I had a thought, maybe worm gears are good for low reductions, but maybe they don’t do too well under higher loads? I have experimented with worm gears myself and I always come to realize that normal gear reductions just have less friction when driving something. Maybe you could go a little bit faster with normal gears?
You needed more fuel to air on full throttle, turn the side needle ccw out 1/2 turn you need a little smoke and a better gearbox maybe from a RC truck hpi savage 25 should work
How to start: Pull once or twice with air intake closed (finger on) or instead put some drops of fuel directly into the air intake. Makes starting a lot easier.
Excellent suggestion. Caution: All you want to do is pull fuel from the tank to completely fill the fuel line. DO NOT pull fuel into the engine because it's really easy to pull too much. If too much goes into the crank case the engine becomes hydro-locked. Trying to start it when hydro-locked will severely damage the engine. Trust me, I know: I tore the skirt off of the piston on one of my engines!
@@richardunruh4035 I used to start my model airplane engines by hand. I let some fuel enter the crank case, two or three drops at most. That made hand starting a lot easier. To be shure, one can cautiously turn the motor by hand after priming to avoid damages by hydro locking.
@@richardunruh4035 if the cylinder floods its supereasy to feel it with the pull starter and all you have to do is crank it a couple times with the glowplug removed.
@@norcore8504 I'm missing something in the equation here. Energy density of a fuel is expressed in Joules. How did you go from Joules to Watt without including a time?
@@Dennis19901 look up "Why Nitro Engines Out power everything else" by 'Driving 4 Answers' He goes into detail about the equation, math and engineering behind it better than I ever could. 610hp per liter*
Worm gears are really inefficient at high speed. Maybe you can make several smaller gears (a gerabox) to achiev the ratio you need. Also make a fixed wing drone with a jet engine.
@@MeshJedi The one way ball bearing is a sprag clutch so the bike can free wheel without the motor running. When he removed the sprockets from the rear wheel he also removed the bike's sprag cluch which why he added in the one way bearing.
I still don't know how you manage to make every contraption seem janky and amateur but well made and engineered at the same time. That's a special talent.
Mech. Eng. here. Great video, Integza! Some thoughts: The teflon gear got torn up by the brass worm drive because the teflon gear is resisting the load, so each time the brass worm spins, it digs into the the teflon. Since teflon is softer than brass, it gets chewed up. Ideally gears under load like this should be made from the same material and bathed in very thin oil. That's why transmissions, gearboxes and differentials are designed like this. Another point to note is that you likely are leaving a lot of top-speed on the table using the worm gear with 1:32 gear ratio. Since the nitro engine has 2.5hp and 0.9Nm as compared to the electric with 1.2hp and 50Nm torque, you *only* need ~1:25 gear ratio to achieve the same output. However, because the nitro engine has more hp that means you can trade initial torque out for a higher top speed, and achieve this with an even lower gear ratio. In theory, a gear ratio of 1:13 will get you double the top speed compared to the electric bike. With gear ratios like 1:13, you can easily obtain ordinary gears to use, which will improve overall efficiency compared to the worm gears. The initial acceleration can also be helped by pedaling the bike manually while at very low speeds. Another reason to go this route is that, under ordinary driving conditions, where you are not driving at full speed all the time, you'll be able to feather the throttle to maintain a medium speed, which utilizes your engine more efficiently and dramatically lowers engine wear and tear. 2-stroke engines wear out much faster than 4-stroke engines in general.
To my understanding, it would be better to use a compound gear ratio or a gearbox rather than worm gears in this application anyway since the teeth of the spur gear are rubbing against the worm gear to create a lot more friction at high speed. It's actually a good thing that PLA wasn't used in the final design because of this. I made a (bad) turbine generator back in high school that was intended to withstand higher speeds, but I didn't put enough lubricant around the gears, so the friction generated enough heat for a gear to plastic weld itself to one of the axles. Needless to say, a good chunk of it broke, and I had to reprint the parts.
I was screaming this into my monitor when he used Brass AND Teflon. Maybe he could've used brass on brass with a bit of grease, and put housing around it.
@@PWNAGE703 material wear would technically happen with any gear setup because of friction, but this process is sped up when one material is much softer than the other. With the worm gear to spur gear setup, it's the equivalent of pulling a garbage bag uphill on asphalt. It technically works, but that bag is going to be shredded layer by layer over time until there's trash pouring out (speaking from experience lol)
I don't think a 1:13 ratio is quite realistic. That would give the bike a top speed of like 70 km/h. There's too much air resistance at that speed, you'd probably need a 4-5 hp engine for that. For this engine and bike, I would at most try a 1:20 gear ratio and see if the bike could reach 45-50 km/h. But 32 km/h is quite impressive for such an inefficient gearbox I gotta say.
I recently got a couple of these nitro engines and wanted to make a similar project. I thought about using worm gears too but decided against it due to their low efficiency, I’m surprised it worked well for you.
@@DRSDavidSoft I’m planning on using a 2 stage gearbox. the engine im using only spins up to 12000rpm and my rear wheel is ~ 6 inches so I don’t need as much of a reduction
The 2CV was for 2 "tax horsepowers" ("chevaux fiscaux" in French) which is a way to rate the car for various taxes according to several parameters including the dynamometric horsepowers (noted as "ch" for "chevaux", horses in French). That's why you find specs of modern cars claiming, for example, 150ch and 7CV in French car catalogs.
That wormgear probably causes a ton of friction and power loss. Maybe you could try and redo the transmission with either belts or gears? All that melted teflon is a big indicator for the friction
yeah, that was my first thought when he said he was going to use a worm gear. since you're already using belts, maybe you should see about designing a belt CVT like what motorscooters use for v2, and maybe even add a centripetal clutch?
The engine was not getting to peak power, sounded like 15k to 20k RPM so it still had some headroom. I think either it was not well tuned, still over geared, or too much friction in the system. That said getting around 80kg of man and bike to over 30km per hour is a pretty mean feat when typical stock 1/8th scale RC cars using 3.5cc nitro only manage 80-120km per hour and only weigh around 4-5 kg. Also some of those 3.5cc engines really want 18-25% nitromethane.
As someone who wants to continue to watch awesome Integza videos, please watch a video on tablesaw best practices. Not trying to be a safety nazi, I've just had some close calls and I see some practices in your video that have caused me literal pain until I learned the hard way. I still have all my digits and I'd like you to be able to keep yours too!
I agree. Not only that but he needs to learn how to use his tools. He misused so many tools, its frustrating to watch him. I know engineers are not mechanics, but it really doesnt take much to lean basic workplace safety and correct use of the tools.
@@Brainman_2331 Agreed. Unfortunately most of us end up learning the hard way. Even with proper training, human nature still gets the best of us. It's best to have a healthy fear of ones tools ability to blind and/or mame us 😁
I feel like I just went back in time over 100 years ago, and witnessed the creator of the first motorized bicycle, experimenting and trying to figure it all out. Pretty cool. I think this video has made me an amateur scientist/enthusiast.
There are cheap chinese gasoline engine kits for bicycles you can get online. It isn't the kind of ordeal that repurposing a chainsaw engine or something would be, cause it's a kit designed to be pretty much bolted onto a bike, but it's not all that simple and you learn quite a bit along the way. I have a motorized bike with the 80cc engine kit and yeah it's fun to play around with. You can become an amateur scientist/experimenter for real
Members of the full scale drag racing industry use much higher concentrations of nitromethane: they are limited by the rules to 90% (at least in the NHRA, the main sanctioning body). Historically, racers used higher percentages which frequently caused massive explosions. Modern engines are estimated to generate around 8000 horsepower. The cars can accelerate from 0 to 100 mph in 0.8 seconds and 0 to 335 mph in 4.5 seconds.
True but I used to play with RC nitro cars for years, I used 30 percent nitromethane fuel which is a decent amount of nitro in the mix. You can even buy 40 percent nitro fuels for the race engines
@@KentRoads Did some use Toluene at one point? Other motorsports flirted with the idea a few times, until the toxicity made the FIA and other bodies in the US put a stop to it.
@@Tuberuser187 ah yes, I have a glass every morning alongside my breakfast - as all true racers do. now if you excuse me, I need to go convulse & stumble around yelling incoherently.
Tip to start the engine easier, put your finger over the air intake and turn it over by hand a few times. It chokes it and pumps in some fuel. Then start it normally. When you're done, you should empty the fuel tank and run the engine dry, then put some protectant oil in through the intake and turn it over a few times to distribute. 2 stroke oil, engine oil, and engine cleaning and lubrication products are probably all fine to use for storage.
just a correction: a 2 stroke does NOT like to be run dry, as it runs so lean it stalls from being out of fuel. do this a few times, and it will absolutely score it up and shorten its life drastically. i know some people do it, but its just not good. plus Nitro has no ethanol, and its a synthetic fuel so its like diesel in that it doesnt go bad. no need for this.
Dunno if he is like electroboom and is all part of the character but I see he does some very dumb stuff in many videos. One of the worst ones was the one were he was shown the continuous detonation engine, he did something extremely dumb, he was putting his mouth open into the air blast of the engine, that could have killed him if the air pressure was put to the max by bursting his lungs.
Worm gears give a lot of reduction but aren't very efficient and wear quickly (because of the screwthread rubbing on the gear). They are more useful when you want to lock something in place or clamp with a lot of force (guitar strings or bench vice). Also they only work one way, and you will need a freewheel or your bicycle will grind to a halt as soon as you let off the throttle.
@@theeoddments960 I think a toothed belt for the high speed primary stage and possibly secondary stage, then to chains as the speed comes down and torque comes up.
not all worm gears operate "one way". its about the helix angle. milk/ cream separators, and a lot of vintage cars (pre 1920?) use worm gears that will "back run".
They used to be popular in my area (Croatia)...a lot of chainsaw engines which got thrown away were actualy in good enough shape to use like this on bikes
To start the engine for the first time unit to make sure that there is fuel in the carburator that is why there is fuel line from exhaust to fuel tank in rc car, to do that first you need to blow the fuel line from exhaust to fuel tank with mouth gently.. so after you can see fuel reach carburator, attach the glow plug, than pull the pull start.. don forget to apply oil filter on filter foam
I used to drive a lot of RC monster trucks about 20 years ago or so. Lots of fun... But man, I do not miss all the trouble getting those suckers to run right... These days there are brushless motors in those same trucks and they are SO ridiculously fast in comparison to the old nitro motors. Same fun with 90% less frustration. The nitro motor sounds is like nostalgic PTSD.
I grew up with my dad flying nitro planes, then I got into nitro planes and cars/trucks. Electric have come a loong way and are a majority of what I have nowadays. But, I still have a nitro 1/8 scale HPI Savage and there’s still just something about the process of tinkering with it to get the engine tuned just right and the satisfaction of getting it to run perfectly. And I love the smell of burning nitro fuel…
I sometimes felt like I was the only person who struggled so much with Nitro engines and Carbs somehow never staying tuned. I had like maybe 5 models/engines in the 2000s and in the end felt they're just far too finnicky and fragile to actually want to use and enjoy. The last one I had, a 1/10 truggy somehow jammed full throttle while I was at a busy park, headed straight towards the playground with a bunch of young kids going about 40mph and my immediate thought was this is gonna shatter some toddler's ankle. Really scary experience and while it was incredibly unlucky, that kind of killed my Nitro interest for good. A couple years later I found a used HPI Baja 1/5 Gas buggy selling used for really cheap when they were a grand new and loved that thing. So much easier to work on, less fragile and never had issues with the engine tuning or servos. Like night and day difference in frustration and functionality versus 1/10 scale though my 1/8th buggy was even a big step up in terms of ease of working on it excluding nitro engine issues. I first got a RTR T-Maxx in 2011 when I was like 11 and, even though I never jumped any of my RCs and babied all of them, rarely ever wasn't broken and a money pit. One last thought is I seriously doubt the power claims of RC Nitro engines as I've gotten older and learned more.
This is true, but I have had both there is a different feel to a Nitro when driving. I like that it has a friction break and can free wheel on the clutch. Nitro has a much smoother application of power with a transmission and slipper clutch. Electric feels so violet bc it is insta toque and on breaking it is running motor in revers. Both are fun elec def more reliable plug and paly.
I am still using nitro motors on RC off road buggies. Getting them to run right is part of the fun. The fact that they are actual machines is why I love them. Battery motors are just plain boring.
I always thought tomatoes were disgusting until I tried a garden tomato grown with lots of lime added to the soil. The lime sweetens the soil, and therefore also sweetens the tomatoes. Grocery store produce really is different from homegrown. It looks good, but it tastes terrible.
You should try changing to a compound gearbox, or chain reduction, worm gears are meant for low speed and have a lot of friction loss, which is taking away from your speed.
15:16 The whole difficulty to find asphalt thing is surreal to hear about coming from the US, where even where we had cobblestone roads, we usually paved over them. 😂
If you twist the black ring just behind the chuck of your drill (where the markings are), you can torque limit your drill so that it doesn’t skip on screws (it’ll just stop trying to turn them). You won’t chew out screws as easily, damage the bit or risk stripping whatever you’re drilling into, super useful feature.
@integza WARNING WHILE USING THE TABLE SAW! Dont let the piece of wood stay between the saw blade and the fence. Push that part all the way through because if it touches the blade at all it will kick up and back at you. Your riving knife, the thing behind the blade, helps avoid this, but it isnt fool proof. Otherwise good work and fun video.
They were doing this 40 years ago, remember seeing a guy going up and down the runway at a model show. The Engine runs on Methanol by the way usually with a small percentage of Nitro-Methane maybe 10-15% depending on the engine, also has oil in the mix, we generally just used to run Straight Methanol/Oil mix or 5% Nitro in a model aircraft.
yep. they dont need nitro. and all it does is use more fuel. which costs more... yes, ok, you get a bit more power but thats due to being able to stuff more fuel into the cylinder. nitro by itself barely burns. can almost say its non flammable...
About the actual power of the Citroën 2CV: "2CV" refers to "fiscal power". It is the result of a typically French bureaucratic formula that determines the price of the tax you have to pay when you register your car. The power of the first 2CV was 9hp but the engine has undergone many developments and the latest models such as the one you were driving had a power of 29hp.
Sorry but the 2CV engine is a « flat Two », meaning two cylinders opposite and CV means « Chevaux » (horses). At the end of its carreer, the 2CV was assembled in Portugal but this car is French and the name was designed for the French market to show how it was economical
@@2StrokeWRLD Oh... you got a point there. So the air would simple blow through. Damn.. he would need to modify the exhaust that it always closes whenever air is sucked in but I guess that would be a lot of work and kinda tricky to make it function well at high RPMs edit: Or maybe there is a simple solution? Like the one way air tubes with the little ball blocking air flow into one direction? edit2: Nevermind, this makes totally no sense. Because the air comes from the same direction as the outake goes out. The one way tube was a stupid idea.
On one side yes, valve wouldn't make a solution, on the other - why do you think most of the cars are powered by 4stroke? The for stroke engine has higher torque on low rpms because it blows out almost all of the burnt gasses out the chamber, and sucks in more clean mixture. That makes every stroke more powerful. The 2stroke at the same time blows burnt mixture out and sucks fresh one in. Because both intake and outake are opened the mixture isn't entirely replaced by fresh one - efficiency declines. And it has oil mixed in the fuel to lubricate the internals, so the fuel burns less efficiently. Only pros for the two stroke that i know of: 1. Because of its simple design it can reach insane amount of rpms like in this case 30 000, the 4 stroke moving valves would fale at this speed. 2. The 2 stroke can run effectively on higher temperatures than 4stroke. Any questions?
@5:53: One of the most dangerous moves you can make with a table saw - cutting small pieces off on the right up against the fence. If that piece gets slightly out of alignment it can become pinched and that whole pieces can become airborne... not to mention the insane height of the blade above the work piece. A good way to lose a hand!
2CV meant 2 "Fiscal" horsepower, related to how it would be taxed. Indeed, the first one had 9HP, but the one you're showing actually has 29HP. Love that car, I actually have the exact same! Um grande abraço, e obrigado por o vídeo!
You just gave me a hint that actually solved a problem that persisted for over 6 month now! I completely forgot about one-way bearrings, this is the one mechnaical detail i needed for my whole design, thank you so so much! I am at revision 5 of this specific mechine and i am so fed up with it, you can't imagine. I will execute a tomato in honor for you!
This reminds me of something we have in France ; just after WW2, a bicycle company names VéloSoleX put a 50cc engine producing 0,8 hp on the front of a bike, and they produced it in many versions until the 80's. It's super fun to drive, kinda similar to this masterpiece of homemade engineering and 3d printing you made !
Man the table saw bit had me wincing! Clearly a very clever guy with a good understanding of physics. And then doesn't apply it to a machine that can chop bits off you
2cv came from the "chevaux fiscaux" (varies depending on the size of the car, power of the engine and other factors) and it is what defines the taxes you need to pay on the car. 2cv means it was affordable for the people when it first came out.
Some years ago my son and I got into RC trucks using these "little" engines. I was very satisfying to see you having trouble starting your engine using the pull-cord!!! I have no idea how many knuckes we smacked when we first got our trucks. Even after we started using a drill, it was hard to get the engines to start until we had them broken in! We flipped a truck on a jump once and cracked the engine block (which sucked since we had JUST gotten that engine broken in and running smooth). But it was fun to have an 'extra' engine that we could pull apart and look at and not worry about breaking anything or having to put it back together and have it work. I also have to say, the neighors were not big fan of the trucks!
This channel has many of the experiments I tried back in junior high. Well before 3D printers(decades). Self taught and funded. All failures. So I went into electronics for life. Tomatoes are awesome!
Better get a few clutches on hand for spares. If you hear fuel sizzling in the crank case after shut down, she's too lean. If it ever starts to really run great, it's about two minutes before melting down. Nitro wisdom for you. An infrared therm. Is a good tuning tool.
Next up would be making a gearbox that allows multiple gears. You could likely use the gears already on the rear tire and a chain to allow gear switching.
It would be a good idea to look at the electric mid-drives like the bafang that are fairly popular as a easy electric conversion. That way your gears on your bike act like a transmission still.
RC cars with 2-speed transmission are quite common - there are even some 3-speed ones. The concept is actually quite simple, the higher gears are engaged through centrifugal clutches and the lower ones are then freewheeling on a one-way bearing - theoretically it'd be possible to just keep adding more gears.
First off, love the content. for all the mechanics under us, this is not the kind of use for a worm gear. It's quite dangerous actually, a worm gear is not back driveable, that means if the power of the engine is lost, the back wheel will lock up and make you slide all over the road. With that. A worm gear does not use two kinds of self lubing metals/plastics, most of the time the wheel will be made of brons, and the worm made of steel. Oh, btw, the belt he is using to power de back wheel is a normal V belt made for tight angles, not necessarily a toothed belt used for toothed pulleys. Anyway, don't be mad for this comment, just educating and making sure people who try this are safe, would love to see this tried with a planetary gearbox keep on the amazing content!🤩
A good rule of thumb is to only have the teeth of the table saw stick up past the material. You also want to keep your hands on the work peices as the saw stops. Stay safe man!
2:32 when the left gets tired > the right gets fired😂 either your grandfather didn't understand the saying or you did not listen hard enough when he explained it😂 because the saying is meant to go like this "WHEN THE LEFT GETS TIRED" "THE RIGHT GETS HIRED" 😮
I love this! You definitely did your grandfather proud! I am not engineer, but you definitely, with out a doubt, should have gone with 100:1 ratio. Think of it; if your engine can rev to 30,000 rpm, then the gear is spinning at 300 rpm. I dont know the math but I would guess you could go around 50 km/h. Your engine is riding against the clutch and has not even begun to rev after the clutch engages! It's like holding the head of a weed trimmer stationary while at full throttle. If you do max out the engine then try a 75:1 etc.
Or he could have tried the 50:1 he suggested as optimal and e-bike like in terms of torque in the very beginning of the video. But no, he intentionally messed up to add drama to the video. It's about quirkiness with these content creators, not quality.
If you can reduce the transmission losses with the gear system, I think you'll have no problems with this project. I look forward to the next installment!
Plugging the exhaust till the engine first fires is ideal. They create fuel pressure by using exhaust pressure. They even tell you in the manual to prime them that way if you don’t have a primer bulb. I had a handful of nitro cars when I was a kid
You're hilarious, Joel. And informational. And thorough. And creative. And you seem to have cornered the market on sister assistants. Don't worry about not knowing all the right things yet, they will come to you in time. You're remarkably good at implementing field design modifications, prototyping, 3D modeling, CAD, designing around problems, destroying evil tomatoes...things most boys can only dream of. Thanks a ton for all the videos. I realize they represent a significant investment of your time and life. Good job, man. Good job. That Citroen 2CV was pristine! Thanks for showing that.
15% nitromehane sounds really low. we used 25% back in my youth days and that was the second weakest available back then. you should check the user manual for what they recommend and maybe play with the carburator settings (factory settings are for a very specific fuel mixture and using something else will change how the engine responds). that should give you more power. if you are afraid the engine runs to hot, there should also be an optimal operating temp somewhere in the manual. oh, and a total redo of your drive train. its a very bad sign if the transmission eats itself. ;) thx for jet another fun vid :)
I run 30% on all my nitros here in the states an thats just for street use ...keeps engine cooler an happy ..on top of more power .. But may shorten the life of the engine
Your grandfather left you a brand-new Decathlon/BTwin ELOPS bicycle that retails for €200? He’s a generous man! But seriously, that’s some good work there. As an old-school engineer/mechanic I struggle to understand 3D modelling and printing, but I find it fascinating how you can create complex patterns so easily. That would have taken me many hours on a lathe and mill to make those parts in aluminium. Thank you for an entertaining video!
Hi integza! Please hear me out. Some nitro engines can be purchased for very cheap. I really want to see you buy a few of them and combine them together into a nitro V12 or whatever. You can even combine more to get even more power! Would be really cool to see you go fast!
You always have great informative videos on engines, for a new one maybe compare your engines and suggest projects that can easily be done by many with different engines
When you started yanking, i immediately thought 'prime it'! They can be a pita to start by hand if not primed. Drill starting spins it much more consistently which manages to draw the fuel on its own.
thank you for your detailed explanations and visualizations of what you are doing and trying to accomplish. It makes it so much easier for us. Non-nerds to follow along with you, and most people on TH-cam skip over half of the things they’re doing making for a total whack of continuity, in their explanations of what they are trying to accomplish! Good show, brother!
For someone who hasn't got a RC car you definitely know how to stop the engine, some people pinch the fuel line which cuts off the fuel but it also cuts off the oil that protects the engine. Nice work with the bike. 😀👍
Best way is to actually plug up the exhaust pipe with a shoe or quick thumb, the intake will obviously be covered by the air filter. competitive RC racer (:
Thumb on the exhaust works. Just do it quick so you don’t burn a nice circle on your thumb. Super easy and quick once you know how fast you can release
ill be 70 and still giggle like a little schoolgirl when i hear a nitro engine full tilt just "WAAAAAAAAAAAAANNNNNNNNNNNNNNNNNNNHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
@@Niewiem0 Funny, I just disassembled an old two-speed dewalt hammer-drill driver, and was immediately impressed with the quality and durability of the planetary gear-set that’s used to facilitate the the high and low speeds. Unfortunately I am still trying to find a way to make a retrofit housing to go around it with input and output and output bearings to hold the shaft in place. The planetary gearbox has 3 sets of 3 planetary gears, and three more ring/center connecting gears. It’s really quite impressive, how strong it seems. I have no doubt that it could be used on a small moped sized vehicle, and support the torque needed…
I love the rumble of a big diesel and the sound of a nitro engine, but as far as my RC cars and trucks go, I run electric now. They are just so much easier. Drop a battery in and go. And now that my kids are somewhat into RC, it's not much fun to try and keep 3 nitro engines going at the same time. It is a lot easier to have a couple of balance chargers and a few extra LiPo batteries ready to go.
@cadenswain158 I absolutely still have 4 or 5 nitro powered vehicles. I am a welder and heavy equipment mechanic, so my whole day is tinkering. But yes, you are very, very right. There is no comparison to the scream of a well tuned nitro engine and the relative unpredictability of the power curve of a nitro engine. They are a blast, but I find myself more and more running electric, just for simplicity and ease.
@@robertschemonia5617 Funny you mention that you're a heavy equipment mechanic and welder. I'm also a heavy equipment mechanic and welder too. What a coincidence! I do get what you mean though. I get home from a 12 hour work day and I don't feel like tinkering much either. Like the saying goes, the mechanics car is always broken, and the maids house is always dirty.
Everybody seems to forget that the type name "2cv" refers to number of cylinders in the Citroen automobile. Granted that in french 'deux chevaux / two horses' abbreviates to 2cv, the cylinders are referenced. -> excerpt from wiki : The 375 cc engine produced its 6.6 kW (9 hp) at 3500rpm and peak torque at 2000rpm. great vid, thks!
In Boulder, CO (where I spent a few summers) I once spoke to an unhomed person that went through the back alleys in residential areas, collecting recyclables in a 2-wheel trailer pulled behind a motorized bike. He claimed to have once been a mechanical engineer, which tracked when he explained how he'd motorized his bike. He had adapted a small, 2-stroke engine to power the bike, but instead of running it on gasoline with 2-stroke oil, he used alcohol, and occasionally treated the engine with some kind of aerospace-grade lubricant. He said he got way better efficiency, and almost never needed to do maintenance or refurbish the engine, I guess because of the lower burning temp of the alcohol, and way the lube worked. His gearing was very simple, and I don't think he had much if any gear-based mechanical advantage, beyond just the spoke-hub that the bike came with, operated with the OED derailleur. It was really impressive.
Nah, he just wanted to be different and didn't like the 2-stroke smell. Running a 2-stroke with no oil will kill it fast, especially with the lower lubricity of ethanol. Yeah, this dumb crap shows why he USED to be an engineer.
I had one of these engines when I was a kid, and this was literally my dream! Of course, there were no accessible 3D printers in the 1980s, and I lacked a lot of the other skills and tools, so it never happened. But happy to see it was doable after all!
To make it start easier you need to prime it. Put your finger on the exhaust for a crew turns. Also you can shut it down the same way. Also check the temperature of the engine.
BIVICTEBIANC? I think the acronym needs work. BIVICTEM BI-Valved Internal Combustion Twin-Exhausted Motorcycle. Pedestrians Beware! The Bivictem awaits you! (Yes, yes. I know it's spelled victim, but that didn't fit the acronym. Also, it should be Mo-Ped, not motorcycle, but Mo-Ped just doesn't have the same ring to it.) 😀
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I had a thought, maybe worm gears are good for low reductions, but maybe they don’t do too well under higher loads? I have experimented with worm gears myself and I always come to realize that normal gear reductions just have less friction when driving something. Maybe you could go a little bit faster with normal gears?
I think you needed to pull the fuel through to the engine the first time, it might benefit from a priming bubble. 👍🇬🇧
Ps no more than 8mm of your circular saw blade above the wood 😳😳😳😳 more dangerous than jet engines.... possibly 🤣
Great vid!
You needed more fuel to air on full throttle, turn the side needle ccw out 1/2 turn you need a little smoke and a better gearbox maybe from a RC truck hpi savage 25 should work
How to start: Pull once or twice with air intake closed (finger on) or instead put some drops of fuel directly into the air intake. Makes starting a lot easier.
Excellent suggestion. Caution: All you want to do is pull fuel from the tank to completely fill the fuel line. DO NOT pull fuel into the engine because it's really easy to pull too much. If too much goes into the crank case the engine becomes hydro-locked. Trying to start it when hydro-locked will severely damage the engine. Trust me, I know: I tore the skirt off of the piston on one of my engines!
@@richardunruh4035 I used to start my model airplane engines by hand. I let some fuel enter the crank case, two or three drops at most. That made hand starting a lot easier. To be shure, one can cautiously turn the motor by hand after priming to avoid damages by hydro locking.
@@martinwilliges532 nah just use a drill to start it
Came in to say this, leaving satisfied. 🙂
@@richardunruh4035 if the cylinder floods its supereasy to feel it with the pull starter and all you have to do is crank it a couple times with the glowplug removed.
The fact these little nitro engines can put out 0.6 to over 3.5 hp from up to max of 7cc is insane!
Must be the extra oxygen in the nitromethane.
top fuel engines make up to 12,000bhp on this fuel but at a 90%nitro
Roughly 610hp per cubic liter in the engine, there's a bunch of videos out there going into detail about these engines and how cool they are.
@@norcore8504 I'm missing something in the equation here.
Energy density of a fuel is expressed in Joules. How did you go from Joules to Watt without including a time?
@@Dennis19901 look up "Why Nitro Engines Out power everything else" by 'Driving 4 Answers'
He goes into detail about the equation, math and engineering behind it better than I ever could.
610hp per liter*
That one mosquito at 3am 00:01
Worm gears are really inefficient at high speed. Maybe you can make several smaller gears (a gerabox) to achiev the ratio you need.
Also make a fixed wing drone with a jet engine.
Planetary gears are literally made for this
this
Worm gears also can't backdrive, which maybe be bad in this case. Motors stops, bike goes stop.
Yeah the power delivered to the wheel got murdered by the worm gearing.
@@MeshJedi The one way ball bearing is a sprag clutch so the bike can free wheel without the motor running. When he removed the sprockets from the rear wheel he also removed the bike's sprag cluch which why he added in the one way bearing.
The cool engine sounds like it's powered by angry mosquitoes. :-)
Ye
Or wasps 😉
Same
William Osman: "BEEESSSSSSS!"
ye
I still don't know how you manage to make every contraption seem janky and amateur but well made and engineered at the same time.
That's a special talent.
Mech. Eng. here. Great video, Integza! Some thoughts:
The teflon gear got torn up by the brass worm drive because the teflon gear is resisting the load, so each time the brass worm spins, it digs into the the teflon. Since teflon is softer than brass, it gets chewed up. Ideally gears under load like this should be made from the same material and bathed in very thin oil. That's why transmissions, gearboxes and differentials are designed like this.
Another point to note is that you likely are leaving a lot of top-speed on the table using the worm gear with 1:32 gear ratio. Since the nitro engine has 2.5hp and 0.9Nm as compared to the electric with 1.2hp and 50Nm torque, you *only* need ~1:25 gear ratio to achieve the same output. However, because the nitro engine has more hp that means you can trade initial torque out for a higher top speed, and achieve this with an even lower gear ratio. In theory, a gear ratio of 1:13 will get you double the top speed compared to the electric bike. With gear ratios like 1:13, you can easily obtain ordinary gears to use, which will improve overall efficiency compared to the worm gears. The initial acceleration can also be helped by pedaling the bike manually while at very low speeds. Another reason to go this route is that, under ordinary driving conditions, where you are not driving at full speed all the time, you'll be able to feather the throttle to maintain a medium speed, which utilizes your engine more efficiently and dramatically lowers engine wear and tear. 2-stroke engines wear out much faster than 4-stroke engines in general.
To my understanding, it would be better to use a compound gear ratio or a gearbox rather than worm gears in this application anyway since the teeth of the spur gear are rubbing against the worm gear to create a lot more friction at high speed. It's actually a good thing that PLA wasn't used in the final design because of this. I made a (bad) turbine generator back in high school that was intended to withstand higher speeds, but I didn't put enough lubricant around the gears, so the friction generated enough heat for a gear to plastic weld itself to one of the axles. Needless to say, a good chunk of it broke, and I had to reprint the parts.
I was screaming this into my monitor when he used Brass AND Teflon. Maybe he could've used brass on brass with a bit of grease, and put housing around it.
@@silvory7021I’d be interested to see the parasitic loss with different gear set ups. Very interesting
@@PWNAGE703 material wear would technically happen with any gear setup because of friction, but this process is sped up when one material is much softer than the other. With the worm gear to spur gear setup, it's the equivalent of pulling a garbage bag uphill on asphalt. It technically works, but that bag is going to be shredded layer by layer over time until there's trash pouring out (speaking from experience lol)
I don't think a 1:13 ratio is quite realistic. That would give the bike a top speed of like 70 km/h. There's too much air resistance at that speed, you'd probably need a 4-5 hp engine for that. For this engine and bike, I would at most try a 1:20 gear ratio and see if the bike could reach 45-50 km/h. But 32 km/h is quite impressive for such an inefficient gearbox I gotta say.
I recently got a couple of these nitro engines and wanted to make a similar project. I thought about using worm gears too but decided against it due to their low efficiency, I’m surprised it worked well for you.
What did you end up using instead?
@@DRSDavidSoft I’m planning on using a 2 stage gearbox. the engine im using only spins up to 12000rpm and my rear wheel is ~ 6 inches so I don’t need as much of a reduction
Especially dry with no lubricant, no wonder it was churning the mating part up. Solid lube ain't enough
I think a planetary gear could work to lower the very high RPMs to something more useful.
@@dapz you could also use multiple pulleys, might be easier to build than a gearbox
The 2CV was for 2 "tax horsepowers" ("chevaux fiscaux" in French) which is a way to rate the car for various taxes according to several parameters including the dynamometric horsepowers (noted as "ch" for "chevaux", horses in French).
That's why you find specs of modern cars claiming, for example, 150ch and 7CV in French car catalogs.
That wormgear probably causes a ton of friction and power loss. Maybe you could try and redo the transmission with either belts or gears? All that melted teflon is a big indicator for the friction
Yes. could benefit from selectable gears also
yeah, that was my first thought when he said he was going to use a worm gear. since you're already using belts, maybe you should see about designing a belt CVT like what motorscooters use for v2, and maybe even add a centripetal clutch?
@@SevenWay-pu1xm designing a cvt sounds like hell
i guess "designing" wouldnt be too bad but actually making it usable would suck
the wormgear can be redesigned to be wider so it can have small ballbearings inside it, so the friction is gone.
The engine was not getting to peak power, sounded like 15k to 20k RPM so it still had some headroom. I think either it was not well tuned, still over geared, or too much friction in the system. That said getting around 80kg of man and bike to over 30km per hour is a pretty mean feat when typical stock 1/8th scale RC cars using 3.5cc nitro only manage 80-120km per hour and only weigh around 4-5 kg. Also some of those 3.5cc engines really want 18-25% nitromethane.
Making your own gears with a 3-D printer - awesome. Joining the parts together using drywall screws - priceless.
I have this huge box of drywall screws in my basement and you best believe I be using those bad boys on just about everything 😂
Good enough for prototype, tech demonstartor
2:27 Don't stop, I'm almost there!
Blessed is the person who is too busy to worry in the daytime, and too sleepy to worry at night.
I drempt of doing that to my bike as a kid, great to see you actually do it.
If ElectroBoom and Jimmy Neutron had a baby, he would be you.
So funny brah!! Now I can't get that picture out of my mind 😂
God that image is stuck in my head now, DAMN YOU😂
@@YoursNKRWhat picture? Mehdi A-effing Jimmy Neutron? 🤣
Gay
Looks more like vladncl 😂
As someone who wants to continue to watch awesome Integza videos, please watch a video on tablesaw best practices. Not trying to be a safety nazi, I've just had some close calls and I see some practices in your video that have caused me literal pain until I learned the hard way. I still have all my digits and I'd like you to be able to keep yours too!
I agree. Not only that but he needs to learn how to use his tools. He misused so many tools, its frustrating to watch him. I know engineers are not mechanics, but it really doesnt take much to lean basic workplace safety and correct use of the tools.
@@Brainman_2331 Agreed. Unfortunately most of us end up learning the hard way. Even with proper training, human nature still gets the best of us. It's best to have a healthy fear of ones tools ability to blind and/or mame us 😁
his grandfather had to have been a nazi, he's in portugal and looks german.
@@Brainman_2331 Watching him partially strip out every screw with his drill made me sick
you would shit literal bricks if you came to my job lol
I feel like I just went back in time over 100 years ago, and witnessed the creator of the first motorized bicycle, experimenting and trying to figure it all out. Pretty cool. I think this video has made me an amateur scientist/enthusiast.
There are cheap chinese gasoline engine kits for bicycles you can get online. It isn't the kind of ordeal that repurposing a chainsaw engine or something would be, cause it's a kit designed to be pretty much bolted onto a bike, but it's not all that simple and you learn quite a bit along the way. I have a motorized bike with the 80cc engine kit and yeah it's fun to play around with. You can become an amateur scientist/experimenter for real
These engines are actually fueled by methanol, but the fuel is often doped with nitromethane as a performance additive.
Members of the full scale drag racing industry use much higher concentrations of nitromethane: they are limited by the rules to 90% (at least in the NHRA, the main sanctioning body). Historically, racers used higher percentages which frequently caused massive explosions. Modern engines are estimated to generate around 8000 horsepower. The cars can accelerate from 0 to 100 mph in 0.8 seconds and 0 to 335 mph in 4.5 seconds.
True but I used to play with RC nitro cars for years, I used 30 percent nitromethane fuel which is a decent amount of nitro in the mix. You can even buy 40 percent nitro fuels for the race engines
Depends on the region, in europe they banned nitro concentrations over 16%. I think he is in europe?@@Chevymonster203
@@KentRoads Did some use Toluene at one point? Other motorsports flirted with the idea a few times, until the toxicity made the FIA and other bodies in the US put a stop to it.
@@Tuberuser187 ah yes, I have a glass every morning alongside my breakfast - as all true racers do. now if you excuse me, I need to go convulse & stumble around yelling incoherently.
Tip to start the engine easier, put your finger over the air intake and turn it over by hand a few times. It chokes it and pumps in some fuel. Then start it normally.
When you're done, you should empty the fuel tank and run the engine dry, then put some protectant oil in through the intake and turn it over a few times to distribute. 2 stroke oil, engine oil, and engine cleaning and lubrication products are probably all fine to use for storage.
Good advice, thank you
just a correction: a 2 stroke does NOT like to be run dry, as it runs so lean it stalls from being out of fuel. do this a few times, and it will absolutely score it up and shorten its life drastically. i know some people do it, but its just not good. plus Nitro has no ethanol, and its a synthetic fuel so its like diesel in that it doesnt go bad. no need for this.
U need to put the finger in the exhaust … the exhaust pumps the gas in the carb
Make a drone out of nitro engines
😂
A scooter
@@crispyfish2878 that wouldnt make much sense
Crosscutting a 2x4 on the table saw using the fence like that is a great way to lose a couple fingers my friend. Use the cross cut sled for that.
Finally, a comment about the table saw! You are scaring the hell out of me.
Seriously! Especially with how high the blade is set!
I came looking for this comment. The usual cavalier attitude he has towards learning how to use his tools will not serve him well with a table saw.
The saw is pretty bad, but did you see the drill press?! *brushes hand directly next to rotating drill bit*
Dunno if he is like electroboom and is all part of the character but I see he does some very dumb stuff in many videos. One of the worst ones was the one were he was shown the continuous detonation engine, he did something extremely dumb, he was putting his mouth open into the air blast of the engine, that could have killed him if the air pressure was put to the max by bursting his lungs.
Worm gears give a lot of reduction but aren't very efficient and wear quickly (because of the screwthread rubbing on the gear). They are more useful when you want to lock something in place or clamp with a lot of force (guitar strings or bench vice).
Also they only work one way, and you will need a freewheel or your bicycle will grind to a halt as soon as you let off the throttle.
A couple different jackshafts with a few radical reductions would have been much better to use
@@theeoddments960 I think a toothed belt for the high speed primary stage and possibly secondary stage, then to chains as the speed comes down and torque comes up.
I wanted to write same thing. Two stages belt/chain would be much better.
not all worm gears operate "one way". its about the helix angle.
milk/ cream separators, and a lot of vintage cars (pre 1920?) use worm gears that will "back run".
You just unwittingly taught me the difference between Horsepower and Torque.
in Uruguay, those modified bikes are pretty common; we call em "Mosquitos", pretty accurate naming if you ask me
That's funny, ever ridden one? Sounds like it'd be terrifying to turn 😂, doesn't have the width and stability of a motorcycle.
They used to be popular in my area (Croatia)...a lot of chainsaw engines which got thrown away were actualy in good enough shape to use like this on bikes
Dog small dogs always chase you?
There was an Italian brand back in the day that used to make motorised bicycles and they named their engines also “mosquitos”
Little correction : The Citroën 2CV does not stand for 2 horse power. It stands for 2 TAX horsepower
I was looking for such a comment. The actual power output of the car is between 9 and 30 hp depending on the version.
Tax avoidance at its best :)
Yeah this one is 29hp :)
@@thecatofnineswords it aint tax avoidance, iirc it was the same as owning two living horses so far as taxes go
I always thought it was for 2 Cylinders, 2 Valves and the host was being snarky.
To start the engine for the first time unit to make sure that there is fuel in the carburator that is why there is fuel line from exhaust to fuel tank in rc car, to do that first you need to blow the fuel line from exhaust to fuel tank with mouth gently.. so after you can see fuel reach carburator, attach the glow plug, than pull the pull start.. don forget to apply oil filter on filter foam
I used to drive a lot of RC monster trucks about 20 years ago or so. Lots of fun... But man, I do not miss all the trouble getting those suckers to run right... These days there are brushless motors in those same trucks and they are SO ridiculously fast in comparison to the old nitro motors. Same fun with 90% less frustration.
The nitro motor sounds is like nostalgic PTSD.
Yep, nitromethane engines are as finicky AF. The satisfaction of getting one running never outweighed the frustration for me.
I grew up with my dad flying nitro planes, then I got into nitro planes and cars/trucks. Electric have come a loong way and are a majority of what I have nowadays. But, I still have a nitro 1/8 scale HPI Savage and there’s still just something about the process of tinkering with it to get the engine tuned just right and the satisfaction of getting it to run perfectly. And I love the smell of burning nitro fuel…
I sometimes felt like I was the only person who struggled so much with Nitro engines and Carbs somehow never staying tuned. I had like maybe 5 models/engines in the 2000s and in the end felt they're just far too finnicky and fragile to actually want to use and enjoy. The last one I had, a 1/10 truggy somehow jammed full throttle while I was at a busy park, headed straight towards the playground with a bunch of young kids going about 40mph and my immediate thought was this is gonna shatter some toddler's ankle. Really scary experience and while it was incredibly unlucky, that kind of killed my Nitro interest for good.
A couple years later I found a used HPI Baja 1/5 Gas buggy selling used for really cheap when they were a grand new and loved that thing. So much easier to work on, less fragile and never had issues with the engine tuning or servos. Like night and day difference in frustration and functionality versus 1/10 scale though my 1/8th buggy was even a big step up in terms of ease of working on it excluding nitro engine issues. I first got a RTR T-Maxx in 2011 when I was like 11 and, even though I never jumped any of my RCs and babied all of them, rarely ever wasn't broken and a money pit. One last thought is I seriously doubt the power claims of RC Nitro engines as I've gotten older and learned more.
This is true, but I have had both there is a different feel to a Nitro when driving. I like that it has a friction break and can free wheel on the clutch. Nitro has a much smoother application of power with a transmission and slipper clutch. Electric feels so violet bc it is insta toque and on breaking it is running motor in revers. Both are fun elec def more reliable plug and paly.
I am still using nitro motors on RC off road buggies. Getting them to run right is part of the fun. The fact that they are actual machines is why I love them. Battery motors are just plain boring.
It is so good that you finally have a proper CNC machine. I wish you many successful projects.
1:20 "The bicycle my grandfather left me" => shows a modern Decathlon Elops 🤣
"as my grandfather used to say: you can never lubrificate too much. That's why he ended up with 11 kids" -Integza
why has nobody else said this.
@@AdrianGarcia-dm4ep because it was just said in the video we all just watched, there is no point in quoting it
@@d.-_-b nerd @leo_Aqua it still funny
Whenever I try to learn something from the progress, I only remember "Tomatoes are disgusting."
It's all you need to know. Tomatoes are disgusting.
Spoken like a 15th century European
I always thought tomatoes were disgusting until I tried a garden tomato grown with lots of lime added to the soil. The lime sweetens the soil, and therefore also sweetens the tomatoes. Grocery store produce really is different from homegrown. It looks good, but it tastes terrible.
You should try changing to a compound gearbox, or chain reduction, worm gears are meant for low speed and have a lot of friction loss, which is taking away from your speed.
15:16 The whole difficulty to find asphalt thing is surreal to hear about coming from the US, where even where we had cobblestone roads, we usually paved over them. 😂
Difficult in the local he is living in Portugal, not in the country. It´s because he needed a road free from regular traffic.
If you twist the black ring just behind the chuck of your drill (where the markings are), you can torque limit your drill so that it doesn’t skip on screws (it’ll just stop trying to turn them). You won’t chew out screws as easily, damage the bit or risk stripping whatever you’re drilling into, super useful feature.
Yeah nobody uses the clutch on their drills for some reason...like...it is so effing handy. I dont get it.
@@AaronHendu probably because they don't know which setting to use? I use it all the time while turning bolts to limit the torque
I noticed this too but think it was because he had the bit at an angle to the screw head.
Or maybe not buy shit screws anymore and replace everything with torx heads?
The entertainment value of this video outweighs its educational value, but you know what? I'm into that
It's the same as I made a thing.
Two entertaining idiots with just enough knowledge to be dangerous.
Love it.
@integza WARNING WHILE USING THE TABLE SAW! Dont let the piece of wood stay between the saw blade and the fence. Push that part all the way through because if it touches the blade at all it will kick up and back at you. Your riving knife, the thing behind the blade, helps avoid this, but it isnt fool proof. Otherwise good work and fun video.
They were doing this 40 years ago, remember seeing a guy going up and down the runway at a model show. The Engine runs on Methanol by the way usually with a small percentage of Nitro-Methane maybe 10-15% depending on the engine, also has oil in the mix, we generally just used to run Straight Methanol/Oil mix or 5% Nitro in a model aircraft.
yep. they dont need nitro. and all it does is use more fuel. which costs more...
yes, ok, you get a bit more power but thats due to being able to stuff more fuel into the cylinder.
nitro by itself barely burns. can almost say its non flammable...
About the actual power of the Citroën 2CV: "2CV" refers to "fiscal power". It is the result of a typically French bureaucratic formula that determines the price of the tax you have to pay when you register your car. The power of the first 2CV was 9hp but the engine has undergone many developments and the latest models such as the one you were driving had a power of 29hp.
2CV because it had 2 cylinders in V configuration. But it was called 2 cavalos (2 horses) here in Portugal.
Sorry but the 2CV engine is a « flat Two », meaning two cylinders opposite and CV means « Chevaux » (horses). At the end of its carreer, the 2CV was assembled in Portugal but this car is French and the name was designed for the French market to show how it was economical
Also one horse has about 4 "horse power"... so who is fooling whom here?
Now I want to see you building a Turbo for that engine :D Excaclty for that spot where the air flows in.
It's an cool idea tho but on a two stroke engine the intake and exhaust port are both open at the same time so it wouldn't create much boost
@@2StrokeWRLD Oh... you got a point there. So the air would simple blow through. Damn.. he would need to modify the exhaust that it always closes whenever air is sucked in but I guess that would be a lot of work and kinda tricky to make it function well at high RPMs
edit: Or maybe there is a simple solution? Like the one way air tubes with the little ball blocking air flow into one direction?
edit2: Nevermind, this makes totally no sense. Because the air comes from the same direction as the outake goes out. The one way tube was a stupid idea.
@@Craftronix he could use valves for the intake and exhaust
On one side yes, valve wouldn't make a solution, on the other - why do you think most of the cars are powered by 4stroke? The for stroke engine has higher torque on low rpms because it blows out almost all of the burnt gasses out the chamber, and sucks in more clean mixture. That makes every stroke more powerful. The 2stroke at the same time blows burnt mixture out and sucks fresh one in. Because both intake and outake are opened the mixture isn't entirely replaced by fresh one - efficiency declines. And it has oil mixed in the fuel to lubricate the internals, so the fuel burns less efficiently. Only pros for the two stroke that i know of:
1. Because of its simple design it can reach insane amount of rpms like in this case 30 000, the 4 stroke moving valves would fale at this speed.
2. The 2 stroke can run effectively on higher temperatures than 4stroke.
Any questions?
@@justinasnorkunas2966 he could go 4 stroke but that has more weight and idk about if they got it in the same size of the current engine he used
2:18 you seem to have a lot of practice with that motion
@5:53: One of the most dangerous moves you can make with a table saw - cutting small pieces off on the right up against the fence. If that piece gets slightly out of alignment it can become pinched and that whole pieces can become airborne... not to mention the insane height of the blade above the work piece. A good way to lose a hand!
2CV meant 2 "Fiscal" horsepower, related to how it would be taxed.
Indeed, the first one had 9HP, but the one you're showing actually has 29HP. Love that car, I actually have the exact same!
Um grande abraço, e obrigado por o vídeo!
You just gave me a hint that actually solved a problem that persisted for over 6 month now! I completely forgot about one-way bearrings, this is the one mechnaical detail i needed for my whole design, thank you so so much! I am at revision 5 of this specific mechine and i am so fed up with it, you can't imagine. I will execute a tomato in honor for you!
It's funny because he didn't notice (or mention) that the bearing on the recoil starter is also a one way bearing lol.
The most beautiful things in the world cannot be seen or even touched. They must be felt with the heart.
Worm gears at 30.000 Rip-ems.. I'mma need me some popcorn for this :D
Would be nice to see. In the video engine was never going over 10.000rpm by sound
This reminds me of something we have in France ; just after WW2, a bicycle company names VéloSoleX put a 50cc engine producing 0,8 hp on the front of a bike, and they produced it in many versions until the 80's. It's super fun to drive, kinda similar to this masterpiece of homemade engineering and 3d printing you made !
50 cc two wheelers are still in use- en.m.wikipedia.org/wiki/Moped
@@rtos Yes, I have one
Also motorized bike kits.
Man the table saw bit had me wincing! Clearly a very clever guy with a good understanding of physics.
And then doesn't apply it to a machine that can chop bits off you
2cv came from the "chevaux fiscaux" (varies depending on the size of the car, power of the engine and other factors) and it is what defines the taxes you need to pay on the car. 2cv means it was affordable for the people when it first came out.
Some years ago my son and I got into RC trucks using these "little" engines. I was very satisfying to see you having trouble starting your engine using the pull-cord!!! I have no idea how many knuckes we smacked when we first got our trucks. Even after we started using a drill, it was hard to get the engines to start until we had them broken in!
We flipped a truck on a jump once and cracked the engine block (which sucked since we had JUST gotten that engine broken in and running smooth). But it was fun to have an 'extra' engine that we could pull apart and look at and not worry about breaking anything or having to put it back together and have it work.
I also have to say, the neighors were not big fan of the trucks!
Not sure why you quoted the word little. They are literally a little engine. Quotes are not needed in this case.
This channel has many of the experiments I tried back in junior high. Well before 3D printers(decades). Self taught and funded. All failures. So I went into electronics for life. Tomatoes are awesome!
Better get a few clutches on hand for spares. If you hear fuel sizzling in the crank case after shut down, she's too lean. If it ever starts to really run great, it's about two minutes before melting down. Nitro wisdom for you. An infrared therm. Is a good tuning tool.
Next up would be making a gearbox that allows multiple gears. You could likely use the gears already on the rear tire and a chain to allow gear switching.
It would be a good idea to look at the electric mid-drives like the bafang that are fairly popular as a easy electric conversion.
That way your gears on your bike act like a transmission still.
RC cars with 2-speed transmission are quite common - there are even some 3-speed ones. The concept is actually quite simple, the higher gears are engaged through centrifugal clutches and the lower ones are then freewheeling on a one-way bearing - theoretically it'd be possible to just keep adding more gears.
What a beautiful country. Lovely people, lovely food and lovely weather. 😊
First off, love the content.
for all the mechanics under us, this is not the kind of use for a worm gear. It's quite dangerous actually,
a worm gear is not back driveable, that means if the power of the engine is lost, the back wheel will lock up and make you slide all over the road.
With that. A worm gear does not use two kinds of self lubing metals/plastics, most of the time the wheel will be made of brons, and the worm made of steel.
Oh, btw, the belt he is using to power de back wheel is a normal V belt made for tight angles, not necessarily a toothed belt used for toothed pulleys.
Anyway, don't be mad for this comment, just educating and making sure people who try this are safe,
would love to see this tried with a planetary gearbox
keep on the amazing content!🤩
I absolutely love this!! You achieved what I failed to do as a teenage kid with model plane engines.
For years this idea has been bouncing around in my head! I'm happy to see it manifested in such an enjoyable way.
This guy is genuinely a cool guy.
A good rule of thumb is to only have the teeth of the table saw stick up past the material. You also want to keep your hands on the work peices as the saw stops. Stay safe man!
2:32 when the left gets tired > the right gets fired😂 either your grandfather didn't understand the saying or you did not listen hard enough when he explained it😂 because the saying is meant to go like this "WHEN THE LEFT GETS TIRED" "THE RIGHT GETS HIRED" 😮
You have to tune the carb mixture screw for full throttle. Every day.
I love this! You definitely did your grandfather proud! I am not engineer, but you definitely, with out a doubt, should have gone with 100:1 ratio. Think of it; if your engine can rev to 30,000 rpm, then the gear is spinning at 300 rpm. I dont know the math but I would guess you could go around 50 km/h. Your engine is riding against the clutch and has not even begun to rev after the clutch engages! It's like holding the head of a weed trimmer stationary while at full throttle. If you do max out the engine then try a 75:1 etc.
Or he could have tried the 50:1 he suggested as optimal and e-bike like in terms of torque in the very beginning of the video. But no, he intentionally messed up to add drama to the video. It's about quirkiness with these content creators, not quality.
Geweldig gedaan :)
Ik vond het leuk om te zien hoe je dat gedaan hebt.
If you can reduce the transmission losses with the gear system, I think you'll have no problems with this project. I look forward to the next installment!
For those who do not know.
What he called a one way bearing is actually called a Sprague clutch ...to help with your collection of parts.
Plugging the exhaust till the engine first fires is ideal. They create fuel pressure by using exhaust pressure. They even tell you in the manual to prime them that way if you don’t have a primer bulb. I had a handful of nitro cars when I was a kid
You're hilarious, Joel. And informational. And thorough. And creative. And you seem to have cornered the market on sister assistants.
Don't worry about not knowing all the right things yet, they will come to you in time. You're remarkably good at implementing field design modifications, prototyping, 3D modeling, CAD, designing around problems, destroying evil tomatoes...things most boys can only dream of. Thanks a ton for all the videos. I realize they represent a significant investment of your time and life. Good job, man. Good job.
That Citroen 2CV was pristine! Thanks for showing that.
Amazing video man, keep it up!
Can you do an efficiency test if you use this as electric generator? How much watts can you get from this. Could be useful for charging batteries
We love you integza
15% nitromehane sounds really low. we used 25% back in my youth days and that was the second weakest available back then.
you should check the user manual for what they recommend and maybe play with the carburator settings (factory settings are for a very specific fuel mixture and using something else will change how the engine responds). that should give you more power.
if you are afraid the engine runs to hot, there should also be an optimal operating temp somewhere in the manual.
oh, and a total redo of your drive train. its a very bad sign if the transmission eats itself. ;)
thx for jet another fun vid :)
In some countries you can't buy over 15% without a permit, dunno why but in his first video he talked about this.
@@gotindrachenhartWow running a nitro over there must suck if you can’t buy anything over 15% nitro.
@@Billo-07 I think the states are one of the exceptions from what I've been able to gather. But ya, imagine your "race fuel" is 12% lol
I run 30% on all my nitros here in the states an thats just for street use ...keeps engine cooler an happy ..on top of more power .. But may shorten the life of the engine
Thought the same, 30% is what I use for all my nitro engines
Your grandfather left you a brand-new Decathlon/BTwin ELOPS bicycle that retails for €200? He’s a generous man!
But seriously, that’s some good work there. As an old-school engineer/mechanic I struggle to understand 3D modelling and printing, but I find it fascinating how you can create complex patterns so easily. That would have taken me many hours on a lathe and mill to make those parts in aluminium.
Thank you for an entertaining video!
Hi integza! Please hear me out. Some nitro engines can be purchased for very cheap. I really want to see you buy a few of them and combine them together into a nitro V12 or whatever. You can even combine more to get even more power! Would be really cool to see you go fast!
More fast = more loud = more better!
@@isaaclove1144 Preach my friend!
You always have great informative videos on engines, for a new one maybe compare your engines and suggest projects that can easily be done by many with different engines
When you started yanking, i immediately thought 'prime it'! They can be a pita to start by hand if not primed. Drill starting spins it much more consistently which manages to draw the fuel on its own.
Didnt know that Nicolas Cage made motorcycles
So mosquitoes are powered with this engine..
Kool bro 😂
Shame the local council aren't...
The engine is powered by mosquitoes
thank you for your detailed explanations and visualizations of what you are doing and trying to accomplish. It makes it so much easier for us. Non-nerds to follow along with you, and most people on TH-cam skip over half of the things they’re doing making for a total whack of continuity, in their explanations of what they are trying to accomplish! Good show, brother!
For someone who hasn't got a RC car you definitely know how to stop the engine, some people pinch the fuel line which cuts off the fuel but it also cuts off the oil that protects the engine.
Nice work with the bike. 😀👍
good to know
Best way is to actually plug up the exhaust pipe with a shoe or quick thumb, the intake will obviously be covered by the air filter. competitive RC racer (:
Thumb on the exhaust works. Just do it quick so you don’t burn a nice circle on your thumb. Super easy and quick once you know how fast you can release
@@rossfuller3224 yes! I’ve also seen a shoe to the flywheel on racing buggies!
ill be 70 and still giggle like a little schoolgirl when i hear a nitro engine full tilt just "WAAAAAAAAAAAAANNNNNNNNNNNNNNNNNNNHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
Sick. A LOT of work, very scientific. Not what I usually see on U tube. Impressive
My first thought was, you going to use planetary gear box. That would do excellent job of amplifying torq.
You can take one from old drill
@@Niewiem0 Funny, I just disassembled an old two-speed dewalt hammer-drill driver, and was immediately impressed with the quality and durability of the planetary gear-set that’s used to facilitate the the high and low speeds.
Unfortunately I am still trying to find a way to make a retrofit housing to go around it with input and output and output bearings to hold the shaft in place.
The planetary gearbox has 3 sets of 3 planetary gears, and three more ring/center connecting gears. It’s really quite impressive, how strong it seems. I have no doubt that it could be used on a small moped sized vehicle, and support the torque needed…
I love the fact that while everyone else is thinking electric, you're going the opposite direction. Stay cool man!
I love the rumble of a big diesel and the sound of a nitro engine, but as far as my RC cars and trucks go, I run electric now. They are just so much easier. Drop a battery in and go. And now that my kids are somewhat into RC, it's not much fun to try and keep 3 nitro engines going at the same time. It is a lot easier to have a couple of balance chargers and a few extra LiPo batteries ready to go.
Oh yeah I agree, I'm just saying, he's bucking the trends!@@robertschemonia5617
@@robertschemonia5617 I use both. When i want to tinker and hear that sound, nitro. when i want to have 20-30 mins of fun worry free, electric.
@cadenswain158 I absolutely still have 4 or 5 nitro powered vehicles. I am a welder and heavy equipment mechanic, so my whole day is tinkering. But yes, you are very, very right. There is no comparison to the scream of a well tuned nitro engine and the relative unpredictability of the power curve of a nitro engine. They are a blast, but I find myself more and more running electric, just for simplicity and ease.
@@robertschemonia5617 Funny you mention that you're a heavy equipment mechanic and welder. I'm also a heavy equipment mechanic and welder too. What a coincidence! I do get what you mean though. I get home from a 12 hour work day and I don't feel like tinkering much either. Like the saying goes, the mechanics car is always broken, and the maids house is always dirty.
Everybody seems to forget that the type name "2cv" refers to number of cylinders in the Citroen automobile. Granted that in french 'deux chevaux / two horses' abbreviates to 2cv, the cylinders are referenced. -> excerpt from wiki : The 375 cc engine produced its 6.6 kW (9 hp) at 3500rpm and peak torque at 2000rpm.
great vid, thks!
you should put like 2 or 4 of those in line by attaching the crankshaft or something and make every mechanic happy
More mobility related videos❤️
You should've used a larger gear connected to the nitro engine and a smaller to rotate the worm gear shoudve given you a lot more speed at lower power
In Boulder, CO (where I spent a few summers) I once spoke to an unhomed person that went through the back alleys in residential areas, collecting recyclables in a 2-wheel trailer pulled behind a motorized bike. He claimed to have once been a mechanical engineer, which tracked when he explained how he'd motorized his bike. He had adapted a small, 2-stroke engine to power the bike, but instead of running it on gasoline with 2-stroke oil, he used alcohol, and occasionally treated the engine with some kind of aerospace-grade lubricant. He said he got way better efficiency, and almost never needed to do maintenance or refurbish the engine, I guess because of the lower burning temp of the alcohol, and way the lube worked. His gearing was very simple, and I don't think he had much if any gear-based mechanical advantage, beyond just the spoke-hub that the bike came with, operated with the OED derailleur. It was really impressive.
a lot time ago, all engines were on alchogol)
@mrreetmake I had the same thought, but he didn't seem unhappy. Content, is how I'd describe his attitude.
You mean hobo?
@@ghoulbuster1 Nah, that's a term only a**holes use.
Nah, he just wanted to be different and didn't like the 2-stroke smell. Running a 2-stroke with no oil will kill it fast, especially with the lower lubricity of ethanol. Yeah, this dumb crap shows why he USED to be an engineer.
Nitro engines are so powerful
Yup because they're 2 stroke and use nitromethane which contains oxygen = more power 🔥🔥
Pretty cool you got as fast as the average e-bike but with more noise and pollution. Good job!
Ride starts at 14:00
You should drag race Tom Stantons drone motor powered bicycle!
In terms of speed and torque, integza wouldnt stand a chance. Would still be fun to see tho.
I had one of these engines when I was a kid, and this was literally my dream! Of course, there were no accessible 3D printers in the 1980s, and I lacked a lot of the other skills and tools, so it never happened. But happy to see it was doable after all!
Is it a plane?
Is it a bird?
NO! It’s a bike with a RC PLANE ENGINE!!!
😂🤣
To take the HP lie a step further, the average horse has about 15HP
It's about 7 but yeah. Horsepower has nothing to do with the power of a horse.
They probably have around 1500nm+ of torque
To make it start easier you need to prime it. Put your finger on the exhaust for a crew turns. Also you can shut it down the same way. Also check the temperature of the engine.
God that screw at 1:21 gave me chills. Just use an extension next time
that, and the cringe every time he hammers a bearing into place on the inner race... argh
You should call it The Bi-Valve Interior Combustion Twice-Exhausted Bi-Axle Nitro Cycle!
BIVICTEBIANC?
I think the acronym needs work.
BIVICTEM
BI-Valved Internal Combustion Twin-Exhausted Motorcycle.
Pedestrians Beware! The Bivictem awaits you!
(Yes, yes. I know it's spelled victim, but that didn't fit the acronym. Also, it should be Mo-Ped, not motorcycle, but Mo-Ped just doesn't have the same ring to it.) 😀
A friend is someone who understands your past, believes in your future, and accepts you just the way you are.
You should try 3D printing an arbor press for those bearing installs