It is better to press the ball bearings onto the crankshaft and to have a transition fit in the housing. that the load revolves around the inner ring and the outer ring is a point load, so it does not necessarily have to be pressed. In addition, ball bearings do not warp as quickly and have less resistance to thermal expansion.
A tip on the rewiring of the eddy brake to 192V: The wires are made of aluminium and they can be really brittle. So avoid bending/handling them more than necessary. Looking forward to seeing it in action!
If the other engine is called "the most powerfull 2stroke" This beast must be called *THE most insane 2stroke"* 😂🤘 Awesome progress! Cheers from Northern Sweden 🍻
You should be using a 3 flute 45 degree helix endmill for cutting aluminum. Those cutters you have are like 30 degree or less and those are for steel. Hope this helps.
The Brute looks like an evil Decepticon Transformer that’s destined to take over the world! Incredible work! Your journey has been breathtaking to watch! I was part of a SAE Baja team in 2005 at USF in Tampa Florida. We built a retarder dyno in the shop; definitely the way to go.
Apologies ahead of time for the long comment: I've been very interested in the brute force engine because I had a similar idea a few months ago, but right now I have neither the money nor the machining equipment to make a prototype. The idea of a two stroke engine that can run without the need for crankcase pressure allows for unmixed fuel for better combustion as well as elimination of windage to open up a little more power. My question would be what made you choose to use a blower with a rotary valve? The obvious problem you are solving with this is to stop the intake charge from simply being blown out of the chamber without either a pressure wave or back pressure. The solution that came to my mind was implementing a turbocharger. The idea would be to run two wastegates; one that would act as intended, diverting exhaust gases as to not over spin the turbine and create too much boost. The other would go to something similar to a proportioning valve: the idea would be to use this in order to bleed pressure off the exhaust enough to be maybe 10% or 15% less than the pressure on the intake side. This (at least in my mind) would create an environment where the intake charge can be pushed into the cylinder without excessive loss into the exhaust port. It would also have the added bonus of being able to produce more boost than a supercharger would normally be able to, and would be able to withstand an engine running at high RPM more so than a supercharger. I'd love to have a discussion about this if you have the time/ interest for it. I love the content you're making! Keep it up!
I like a good tight fit as much as anybody, but c'mon Alex, that's taking it a bit far! Nice to see you back dude, can't wait to see that blower spinning!
This may sound like a ignorant question. But wouldn't you be worried having press fits on all the bearing races on you crank? When the crank case expands would that put undue stress on the bearings especially at high RPM? Maybe on such a small engine it's not enough to worry about. Also what about on your seals putting something like a snap ring outside so you could press them in from the outside than put in the ring so they wouldn't blow out.
I did think that was an unusually tight fit for a two stroke crank. Edit: he mentioned in another comment that one side of the crank is going to be fitted with a roller bearing, but he only had a normal ball bearing to hand.
The whole key to making your design work is the two piece piston and solid ring. That's never going to work though. The ring needs to "spring" into the cylinder walls to make any kind of power.
The rest of europe the obs plates have also really gone up in price, most of them are back down a little now but i have seen it as much as 2,5 times as before.
It's not always like that, some people click it by accident (On their phone, or when using a touch-pad for example (My K400+ sometimes acts funny, but because I know that I stay away from links and things like that). Then there are people that would like to rate the TH-cam algorithm, it's the same kind of people that give a certain product a 1 star rating, just to say in the review that the product is awesome but that shipping was slow or customer service sucks, hence the 1 star. (For those that don't know: websites like trustpilot and yelp are for rating stores).
Good morning Norway. I hope its a great day for you up there. Question, how will the engine be lubricated? Normal 2T pre-mix? How about the blower lubrication, sealed, pre-packed bearings? Great work, wishing you every success. 👍
I've been thinking of building a retarder(s) based dyno... Though this unit appears humongous for the amount of torque that will be generated by a small engine, then friction will likely be a concern...
Ah, yes, the cooling promises of blow-through scavenging to keep hot spots at bay. Yet I wonder how much parasitic friction power will be eaten here. Did you consider a spool-style rotary valve as a way to eliminate sliding friction?@@2STROKESTUFFING
Curious to know what RPM you anticipate running. I feel the second carby is too big and you won’t get effective atomisation. Take for instance the TKM 135 kart motor. 16000rpm with a 34mm carby. Also, what is the rotary valve made from, and how well you prevent warping and maintain an effective seal?
Do you mean warping from heat? Surely it will be near it's limits, especially since the blow-through cooling affect might tend to be cooling a later "degree" segment and not the blast segment(?).
8:28 Is it correct to press the crankshaft into the bearing, creating a load on the rolling elements? Wouldn't it be more correct to make some kind of tube, which rests against the inner bearing race, so that the entire load during pressing was on the holder, and not on the balls?
Is there anything to be gained in the simulation programs by exhaust system design on a pressure charged two stroke? Or is the bigger the pipe the better?
I still think that you will probably want to have Reed valves on both intakes that totally seal and in the end you will probably be going with a fuel injection system with a O2 sensor and you will then probably need to install a separate 2 stroke oil injection system so that you can run just straight gas in the gas tank with a separate oil tank, but throwing a supercharger on a 2 stroke, call me crazy but I think you are on to something with that idea, and there's no doubt that you will have the most powerful 2 stroke, but you are going have to seal the crankcase and maybe even install a crankcase blow off valve that recirculates the air back behind the carburetor and in front of the supercharger, personally I can't wait to see you pull this off
An O2 sensor would surely be overwhelmed by the excess oxygen of the supercharged blow-through cooling charge, so the signal-to-noise ratio would be effectively zero imo. Perhaps rotary-mounted O2 and temperature sensors in the upstream exhaust port area could give readings over a narrow segment of the exhaust cycle, but nearly impossible to implement without a "Honda" budget(?).
You made a smaller mistake at 8:24 , you held the wrong side of the crank in the vise. This way sometimes you can turn the crank offcenter with the nut by an accident. It has a small chance, but just wanted to let you know :D Hope you great luck with both engines!
Hi! Must say you videos are really good. But next time you put the bearings on a shaft, or a sleeve in a cylinder, try to heat both pieces. by doing so, the outer piece (cylinder or bearing) will not get a cold shock and shrink suddenly, and you have more time to get the pieces paired.
Interesting Vid as always and can't wait to see this in action. I rewound the vid a few times but what is the Fan/ Alternator thing called you are going to use for the Dyno? Looks very interesting and I'd like to look them up some more for other projects I have in mind. All the best with this great work!
@@nerd1000ify Thanks. I'm wondering if one could be used as some sort of generator? Seems like they would be able to make a LOT of power in a compact size given the forces that would be running through them.
@@glumpy10 They're not usable as generators, sadly. They rely on eddy currents, which are actually one of the main causes of inefficiency in generators and electric motors- you could say a retarder is a generator that is designed to have 0% efficiency.
I was so confused by the smooth jazz, and then I realized why it was there 😂👌👈
That was a good one😂😂
Got a good laugh out of me too hahahahha
Also took me a second haha
Hahaha yes
Looks like testing will have to take place soon 😏 can't wait to see it in action!!
It is better to press the ball bearings onto the crankshaft and to have a transition fit in the housing. that the load revolves around the inner ring and the outer ring is a point load, so it does not necessarily have to be pressed. In addition, ball bearings do not warp as quickly and have less resistance to thermal expansion.
Lol that music had me dying also keep up the amazing work can't wait to hear that thing run.
That insertion music was amazing
Always awsome to see how far you are getting with this project ✌
Feels like ive been waiting aaagess for a new vid!
Right???? MORE NEW ENGINE!!!!
That music, got me.
I've watched every video, didn't see that coming.
A tip on the rewiring of the eddy brake to 192V: The wires are made of aluminium and they can be really brittle. So avoid bending/handling them more than necessary. Looking forward to seeing it in action!
Thanks for the tip!
kjapt spørsmål, hvor mange amper drar telma'n på 192 volt? (avhenger jo selvsagt av lasta, men sånn ca max?)
@@burzheru ca 16A max i følge datablad.
Every day when 2stroke releases a new video is instantly upgraded to a great day 👍😀
If the other engine is called "the most powerfull 2stroke"
This beast must be called *THE most insane 2stroke"*
😂🤘
Awesome progress!
Cheers from Northern Sweden 🍻
"the most inefficient two stroke/ the flamethrowe)
@@2STROKESTUFFING I can't wait to see this beast work !!!
You should be using a 3 flute 45 degree helix endmill for cutting aluminum. Those cutters you have are like 30 degree or less and those are for steel. Hope this helps.
Sweet! I just put 6 of those same LED lights in my garage, made a HUGE difference. That supercharged engine is going to sound crazy!
Wow, you sheeted your ceiling with gold!! Frickin scrooge McTwoStroke.
By far my favorite engine build on TH-cam right now, super cool
Aw man I lost it when you were checking that spacer 😂😂
The Brute looks like an evil Decepticon Transformer that’s destined to take over the world! Incredible work! Your journey has been breathtaking to watch!
I was part of a SAE Baja team in 2005 at USF in Tampa Florida. We built a retarder dyno in the shop; definitely the way to go.
Welcome back! I know I missed the uploads. Hope you had a nice time relaxing.
YES, YES,YES, get all that machinery working!
I spat out my coffee on my keyboard when that jazz music started playing. Thanks.
Coming together nicely both the project motor and the shop.
OK OK the 10:01 mark made me laugh out loud so hard I had to pause the video and rewind. Well played sir well played.
I had to look away when that saxophone started playing. LOL
Apologies ahead of time for the long comment:
I've been very interested in the brute force engine because I had a similar idea a few months ago, but right now I have neither the money nor the machining equipment to make a prototype. The idea of a two stroke engine that can run without the need for crankcase pressure allows for unmixed fuel for better combustion as well as elimination of windage to open up a little more power. My question would be what made you choose to use a blower with a rotary valve?
The obvious problem you are solving with this is to stop the intake charge from simply being blown out of the chamber without either a pressure wave or back pressure. The solution that came to my mind was implementing a turbocharger. The idea would be to run two wastegates; one that would act as intended, diverting exhaust gases as to not over spin the turbine and create too much boost. The other would go to something similar to a proportioning valve: the idea would be to use this in order to bleed pressure off the exhaust enough to be maybe 10% or 15% less than the pressure on the intake side. This (at least in my mind) would create an environment where the intake charge can be pushed into the cylinder without excessive loss into the exhaust port. It would also have the added bonus of being able to produce more boost than a supercharger would normally be able to, and would be able to withstand an engine running at high RPM more so than a supercharger. I'd love to have a discussion about this if you have the time/ interest for it.
I love the content you're making! Keep it up!
Maybe mill out the flanges for the seal for a snap ring for easier replacement
The porn music at 9:52 made me LOL.
Good to see you’re back!
I like a good tight fit as much as anybody, but c'mon Alex, that's taking it a bit far! Nice to see you back dude, can't wait to see that blower spinning!
You might want to use twin spark plugs for added combustion.
This may sound like a ignorant question. But wouldn't you be worried having press fits on all the bearing races on you crank? When the crank case expands would that put undue stress on the bearings especially at high RPM? Maybe on such a small engine it's not enough to worry about. Also what about on your seals putting something like a snap ring outside so you could press them in from the outside than put in the ring so they wouldn't blow out.
I did think that was an unusually tight fit for a two stroke crank. Edit: he mentioned in another comment that one side of the crank is going to be fitted with a roller bearing, but he only had a normal ball bearing to hand.
DANG IT MAN! I wasn't expecting that music at all. With headphones on, it scared the crap outta me! Funny though....
Yet another awesome video from you
Maybe clutch between engine and charger is good for disconnect it when no needed. In speed attempt is no acceleration time issue.
For the next design, it may be better to have seals that press in from the outside, and are retained by a bolt on plate.
Or grove and circlip were my thoughts
Each video makes my day :)
Oh 2STROKE STUFFING, I wish I could bore holes as good as you! 🤣
Your channel is basically engineering porn and you finally got the right soundtrack .
Welcome back. Missed you.
7:30 push it, pppush it real good
Wellcome back from the holiday
The sound is great. You must have been very diligent about syncing before, because I never noticed it being off, and I'm pretty sensitive to that.
He work in 100th of millimeter aluminium, I'm sure it was millisecond perfect audio lol
9:51 😆
Getting to the pointy end of things now mate..i cant wait for first fire in the hole
Waiting for the upcoming progress.
Appreciate the effort
Great to see you back... thanks for the 'wideo'.... 🤣👍❤️🇭🇲
The whole key to making your design work is the two piece piston and solid ring. That's never going to work though. The ring needs to "spring" into the cylinder walls to make any kind of power.
The ring is not solid.
Sound is good !!
The rest of europe the obs plates have also really gone up in price, most of them are back down a little now but i have seen it as much as 2,5 times as before.
What was that big rusty chunk of machinery again , i dint understand ?
I don't remember if anyone asked, why not going with fuel injection and avoid the hassle of the carburetors? Thanks! Cheers from Italy!
I believe the carb is for testing and will switch over If the design shows promise
All ways healthy to take a brake and look after the family, feeling fresh and rejuvenated produces good work afterwards
The point where the morning tickle turns into caffeine and the drive to get the job done takes over.... Its a process!. Lube it up and slide it in...
It still amazes me that people can "thumbs down" a video like this. Some people have simply nothing good in their lives and want to share the misery.
It's not always like that, some people click it by accident (On their phone, or when using a touch-pad for example (My K400+ sometimes acts funny, but because I know that I stay away from links and things like that).
Then there are people that would like to rate the TH-cam algorithm, it's the same kind of people that give a certain product a 1 star rating, just to say in the review that the product is awesome but that shipping was slow or customer service sucks, hence the 1 star. (For those that don't know: websites like trustpilot and yelp are for rating stores).
That sensual music had me dying
Nice work as Always 💪😎
Impressive stuff as always, my question is how much parasitic loss will there be given size of the supercharger.
I was thinking the exact same thing 👍
Exactly, considering a tuned pipe is zero . Interesting to see tho .
Good morning Norway. I hope its a great day for you up there. Question, how will the engine be lubricated? Normal 2T pre-mix? How about the blower lubrication, sealed, pre-packed bearings?
Great work, wishing you every success. 👍
I've been thinking of building a retarder(s) based dyno...
Though this unit appears humongous for the amount of torque that will be generated by a small engine, then friction will likely be a concern...
Amazing video
Omg minut 10:00 i smile a lott,you are the best
Any plans to cool the rotary valve? or stop it binding with heat? Really love this channel. watching you for years .
Thanks! Hoping the massive amounts of unburnt methanol will keep it cool enough.
Ah, yes, the cooling promises of blow-through scavenging to keep hot spots at bay.
Yet I wonder how much parasitic friction power will be eaten here.
Did you consider a spool-style rotary valve as a way to eliminate sliding friction?@@2STROKESTUFFING
Why are you not running a slip fit crank like you do on your land speed engine?
Cause I'm going to replace one bearing with a roller bearing, just didn't have any on hand.
Was going to ask the same question, but I couldn't imagine it wasn't already asked.
Curious to know what RPM you anticipate running. I feel the second carby is too big and you won’t get effective atomisation.
Take for instance the TKM 135 kart motor. 16000rpm with a 34mm carby. Also, what is the rotary valve made from, and how well you prevent warping and maintain an effective seal?
Peak power is simulated to be around 19-20krpm. I have a custom "carb" in the plans with a better low pressure area in the venturi.
Do you mean warping from heat? Surely it will be near it's limits, especially since the blow-through cooling affect might tend to be cooling a later "degree" segment and not the blast segment(?).
I love the background elevator music !! :)
8:28 Is it correct to press the crankshaft into the bearing, creating a load on the rolling elements? Wouldn't it be more correct to make some kind of tube, which rests against the inner bearing race, so that the entire load during pressing was on the holder, and not on the balls?
Absolutely, but I can't cause the seal is in the way.
Staaaaaart Alex staaaaart!!!!
It's getting exciting again
Amaizing Man !,,,vhere you buy this blower ????
Super charging crankcase? Is that okay? Will the supercharger try to push piston up while combustion is pushing piston down?
Is there anything to be gained in the simulation programs by exhaust system design on a pressure charged two stroke? Or is the bigger the pipe the better?
Saludos desde Uruguay, excelente esta quedando ese motor ,ya quiero verlo marchar 💪🏼💪🏼💪🏼👏👏👏👏
I still think that you will probably want to have Reed valves on both intakes that totally seal and in the end you will probably be going with a fuel injection system with a O2 sensor and you will then probably need to install a separate 2 stroke oil injection system so that you can run just straight gas in the gas tank with a separate oil tank, but throwing a supercharger on a 2 stroke, call me crazy but I think you are on to something with that idea, and there's no doubt that you will have the most powerful 2 stroke, but you are going have to seal the crankcase and maybe even install a crankcase blow off valve that recirculates the air back behind the carburetor and in front of the supercharger, personally I can't wait to see you pull this off
An O2 sensor would surely be overwhelmed by the excess oxygen of the supercharged blow-through cooling charge, so the signal-to-noise ratio would be effectively zero imo.
Perhaps rotary-mounted O2 and temperature sensors in the upstream exhaust port area could give readings over a narrow segment of the exhaust cycle, but nearly impossible to implement without a "Honda" budget(?).
makes my day!
Awesome, finally a new video!
Why is the old engine in usa btw?
cool build so far mate also cool humour - lol.
cheers.
That music 🤣🤣👌🏻
You made a smaller mistake at 8:24 , you held the wrong side of the crank in the vise. This way sometimes you can turn the crank offcenter with the nut by an accident. It has a small chance, but just wanted to let you know :D Hope you great luck with both engines!
Yep. I cringed. No other practical way of doing it. Next time I'll have the seals install from the outside.
Need to fix those cables between the lights, cant have cables hanging free like that :P
I know, I'll get it done within the next 10-15yrs😁
@@2STROKESTUFFING *angry electrician noises*
@@2STROKESTUFFING
*Hahaha!!* 😂😂👍
I stopped looking at lumber at my local home depot when i saw 97 bucks for a sheet of osb.
Hi! Must say you videos are really good. But next time you put the bearings on a shaft, or a sleeve in a cylinder, try to heat both pieces. by doing so, the outer piece (cylinder or bearing) will not get a cold shock and shrink suddenly, and you have more time to get the pieces paired.
Wood prices have gone up in the UK too as well as cement... Great when you just started building a new shed 🤦🏻♂️😂😂
Very interesting, looking forward to se it make some power! What sealant do you use for the crank cases when you are running on alcohol fuel ?
Bonneville calling ...
I love the machining love music. 😂
the 80s romance music is great..entertainment in entertainment thank you
Love the vids
Can I get a version of this to stick in my golf cart
cool. so did you make the cases yourself? if so pretty sweat!!!!
what kind of power output are you expecting to make with this engine?
is weightreduction gonna be a focuspoint down the line when proof of concept has been achieved? it looks kinda chunky for a 50cc.
Cuanto cubicaje tiene ese motor de dos tiempos y cuanto sería real con el compresor?
What supercharger are you using? It would look good on my sprint bike.
Is that a 3d printed block after the blower? I would've thought heat, fuel and pressure would mean it's not the best place for printed parts.
@@ruben_balea I agree, especially with the alcohol evaporating!
Usually it's careless wishpers butt what ever floats your boat
Do you plan to use this engine on a bike or do you just like building them
Interesting Vid as always and can't wait to see this in action. I rewound the vid a few times but what is the Fan/ Alternator thing called you are going to use for the Dyno? Looks very interesting and I'd like to look them up some more for other projects I have in mind. All the best with this great work!
It's a 'retarder' from a truck. Essentially an electromagnetic brake. The fan blades are to help cool it down (slowing a truck creates a lot of heat).
@@nerd1000ify Thanks. I'm wondering if one could be used as some sort of generator? Seems like they would be able to make a LOT of power in a compact size given the forces that would be running through them.
@@glumpy10 They're not usable as generators, sadly. They rely on eddy currents, which are actually one of the main causes of inefficiency in generators and electric motors- you could say a retarder is a generator that is designed to have 0% efficiency.
hello what is the name of this carburetor?
FINALLY!!!
You think that that glued pressed particle board sheets 44.99 are expensive price of plywood has skyrocketed more than gold $86.00 a sheet