DIY Tip Jet Helicopter (Build) #2
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- เผยแพร่เมื่อ 2 มิ.ย. 2024
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Is it a bad idea to build a giant R/C helicopter completely from scratch using just balsa wood? Well, this video shows you the process of taking my previous Mk1 tip jet helicopter and turning into a lighter, more powerful and more advanced aircraft. Subscribe to catch the next part where I flight test this beast!
▶ Check out Tom's video on the Pendulum Fallacy! • Drone Pendulum Fallacy
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🎵 CREDITS!
Music by Andrew Applepie
www.andrewapplepie.com
/ andrewapplepie
andrewapplepie.bandcamp.com/
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📌ABOUT
Project Air is all about building DIY aerospace engineering creations, learning about the science behind them and testing to the limit. Make sure to check out the rest of the channel to watch projects on RC planes, drones, rc boats, hydrofoils, hydroplanes, seaplanes, rockets and more. Project Air was started in 2017 by James Whomsley 😎
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As mentioned, not sure when the finishing and flying part of this mini series will be coming out 😬 Should I build some rockets in the meantime? Post your thoughts👇
Totally maybe a rocket that launches and little blades pop out instead of a parachute and it autorotates to the ground
The idea is amazing
But
You had a tough time building it
Take a look for this th-cam.com/video/FVwedVUWFz0/w-d-xo.html (Mini Multi Big Rotor! | Flite Test by PeterSripol)... I am not sure if it will fly but is interesting seeing.
Rockets would be righteous! Got an idea for you. Saw a video with Tom Stanton building a drag car and using super capacitors for a quick charge and discharge. I feel that you should build a drop plane, ie, Bell X-1 or maybe X-15, and drop it from the Lancaster or another plane as for the speed record. Then it could glide in. Perhaps vertical take off and glide? You could revisit the shuttle that way, though I'd like to see it as a pusher. Whatcha think?
Not sure about the strength of this airframe but you must see it through now James, and rockets seem to be out at the moment... although how you're going to test fly either while under lockdown is anyone's guess. 🤣
That specific kind of channel, when i hit the like button before i actually watch the video. Thanks!
Me too!
Me too!
Consider my channel as well! I'm just getting started, but the general directives are the same!
Dude you are really underrated. Just to let you know, you inspire me👍
Seems like a Kerbal idea
Ah I see a man of culture you arw
My dog loved this video
Good stuff! The quality of your videos is insanely good! Can't believe you took the risk, even when there was a 20% chance of it blowing up into a million pieces.
callum watt thanks matey
Love the experimentation of of it! Really wish we had the ability to quickly cut out ribs and other air frame parts like that when we were kids.
I can't wait to see more of your 3D Printed Rocket Designs. I've been advocating for people to do this for years, Glad to see someone else with the same thoughts!
Love the energy! Makes me happy 😃
Next, you should try building a multi-copter with wings and a laterally-facing, gimbal-mounted prop. One of the delivery giants are prototyping something similar for drone delivery and I wonder what they see in the design.
Was searching for CLC helicopter but saw this , subscribed haha
Quality stuff- i love seeing the design process including changes/failures/fixes
Hi, am working on a model tip jet rotor system using a rotor head, two blades and two EDF motors in the USA.
I recommend that you at least add a lead - lag hinge (aka draging hinge) with a small amount of movement because even a rigid rotor is not totally static like propeller and keep the edf ' s at or built into the blade tips!
New quote of the day “I’m going to try not to get decapitated” excellent starting point🤗
Hi, i think the Dome where you fitted the Shaft is not strong enough. When you became little Vibrations, the small Wooden Bar brake.
Love your ideas but . . .
One major problem you'll encounter is the moment you start ' flying ' in any direction wing lift will start spinning aircraft in corkscrew as forward motion speeds ads to lift on example right side and deducts from trailing side lift
on left side.
To resolve problem is quite easy using Counter rotating wings ( Rotors )
as this cancels out this problem 100 percent.
One more thing to try is moving thrust points at different positions say down halfway or two thirds from center. That would give sufficient torque and speed to rotation depending on need .
Good luck and never give up , will be watching progress.
Greetings from an old man in South Africa.
Pretty nice work, James! 😃
Stay safe! 🖖😊
This channel just make me happy.
I am currently doing physics and if you want the blades to spin as fast as possible, you will need them to be as far from the frame you can make them. This is because it takes a lot more force to move the blades when the EDF's are essentially the pivot point. If you put them out further the rotational speed will increase and therefore efficiency👍.
Nice video chap!
Please keep trying! I love this idea and I'm sure you'll get it figured out. Its a very underrated airframe. Don't give up man. Love your channel and I hope it grows to be the best hobby channel out there!
Nice work mate
James, if you look up the required rotor speed for an RC helicopter of this size, you will find that it should run much, much faster. Once you have figured out how to achieve the correct speed, you will also discover why rotor blades are never built like wings. Wear protective clothing and film it. ;-)
Hi! I've already done the maths to work out the size and rotational speed of the rotors. They need to spin about 4 times faster than the max speed in this video when I actually have it finished and all go for a test flight.
Putting the ducted fans on the inside also creates added turbulence for the wings to fly through, decreasing lift. I've never been a fan of the tip-jet helicopter concept, but I think that extending the rotors past the EDFs is a particularly bad way forward. Lengthening the wings/rotors should give a better result.
Introducing a progressive twist to the blade profile would help, but it's a complex geometry to calculate and build.
Hey project Air, so for your idea to merge a quad copter with your helicopter for control, I’m not sure if you know this already but you’re going to probably run into an issue with gyroscopic precession. So if you were to induce a force upwards on the right side, the helicopter would actually pitch nose down and the same would be true all the way around, essentially any force you induce Perpendicular to the helicopter blades is going to act 90° clockwise, or in the direction of rotation really. Even so it might work fine as long as you set your controls 90° backwards from the direction of rotation. Either way I would still love to see you try it. I would recommend watching smarter every day’s series on helicopters. pretty much everything I know about them comes from that series. Anyway sorry for the long comment but I thought you would like to know if you didn’t already. Cool beans channel also
Great video! I’m very curious to see how this project will turn out, keep up the hard work!
Thanks for checking it out!
that is amazing, keep up
Whoever told you to move the thrusters close to the centre: you shouldn't have listened unless u have a very powerful EDC/thrusters.
yeah
Considering the individual wing to be a lever your initial assumption of puting the jets a the tips was correct because this is the place where it will be easier for them to counter the drag of wing. Also, the speed and regidity will increase as soon as you add the cover to the blades.
Greate work as always!!!
Your sketches look great ... the perspectives are right and ratios.
Great
Cheers, I've had quite a lot of practice haha
I'm late to the game. Your ideas are good. The inboard 1/3d of rotors don't contribute enough lift to matter. You can make 4, 5, or, more bladed rotor if you leave the inboard portion just a tube. If you are going to test a new helicopter indoors changing them down so they don't disassemble themselves is a good idea.
I really hope you pursue this project, really excited about it. Well made and imposing model and I am sure many people would want to build one,I know I would. Oh for access to your laser cutter what a piece of kit. Cheers from NZ
I wonder if you could place a single EDF in the centre of the rotor assembly, such that it tries to 'inflate' the 4 wings.
The wings would have discharge ports at a certain point along their trailing edges, to propel them into a spin.
That would be rather unique.
I am concerned with the torsion and drag strength of the single spar.
I would like to see 2 parallel.
I have had models with a single spar have issues with wing twist and spars break with minor rough landings. There is a lot of leverage on those.
I would very much like to see your xperimental fly using quadstyle controls 💪 Excited!!
Great! Thanks for your feedback
I don't think it'll be able to hover in place without the quadcopter motors on the fuselodge. The wings will turn one way and the fuse lodge will constantly be spinning the other way. This is why quads always have counter-rotating propellers. You'll have to constantly need at least 2 of the quad motors on and spinning to counteract that torque. Even then, I don't think the amount of torque you'd get from the quad motors on the fuse lodge is enough to counteract the wings.
This is why helicopters have that vertical propeller in the back - it's to work against the spin that the body will want to develop, (and it can work harder to turn the heli, or less harder to let the heli turn the other way)
The noise alone is fantastic! Sounds like a turbine helicopter. I’m excited to see what happens.
Semi-rigidor non-rigid rotorheads are mainly used to reduce stress. When spinning the rotor will want to remain in its plane and so when the helicopters pitches or rolls a lot of stress would get put onto the rotorhead.
Go for it 👍
I really love your ghuts really risky project..!
Flite test did something like this a while ago. Love the video
i love your channel ive been a sub for a couple of months now and your highkey one of my fav creators keep up the awesome work man
I just started watching you recently. Looking forward to seeing how the ejector seat project ends
Great content
Awesome design James, I look forward to seeing where you take it from here. Please wear some safety glasses when testing moving parts, an eye is irreplaceable. Be safe out there.
Change wing shape to maximize lift near engines. Use radial web of Kevlar thread as 'spar'
How about an ornithopter? The heli is looking good though!
Are you aware than when you skin the “wings” the structure stress will be different when lift is applied
i’m sure he doesn’t... 🤦🏼♀️
If you feel the need to use rotors for stability, consider trying a configuration similar to the V22 Osprey using 2 tilt rotors (& potentially a small concealed tail rotor per the scale model). That way you can achieve all of the same things as 4 motors but witth only 2 motors and 2 servos which would also be closer to your CG already.
MORE MORE!!
Keep building it I want to set this work
One fan for each blade and mounted on external side, I thynk u will have more power and the torque will be eliminated. Sorry for my english, good work, greetings from Sicily
I feel like you need a good pare of ball bearings for your central part
also carbon bars for connecting those wings to it......
and maybe adding 2 motors to other wings.....
There are two bearings in the central section. The previous version had carbon tubes but I decided to go with lighter wood for this one.
Love it
Hola ! Si pones helice de 4 palas debes poner los motores en exterior como en la primera prueba para tener mas fuerza
That's an interesting way to get the prop to turn.
Make a helicopter out of a ceiling fan
I don't understand why did you move the thrusters inwards. They produce more torque when placed further away from the hub, therefore, the blades should move faster the further the thrusters are. Am I missing something?
The shaft of a helicopter doesn't move. The swashplate dynamically changes the angle of each blade according to their position. Every revolution each blade continuously changes their angle of attack thus generating where lift is more needed and where need is less needed.
Will probably have some crazy gyroscopic issues when trying to control the craft using a normal quad configuration due to the massive spinning wing. Awesome content and great quality video. Subscribed.
it is a very good idea
There's no such thing as moment of torque but rather tourqe can be defined as moment of force. Fun build.
Thanks for clarifying that! I'm not an engineer (as you might be able to tell) but trying to learn :)
@@Project-Air check out brilliant.org's classical mechanics course. It's a great place to start.
The helicópter is the Best, please
Can you PLEASE make a tutorial on how you design such beautiful aircraft? It would be really nice to see your toolchain. Thx!
you can get aluminum inserts for doors.there 8ft long square piece of metal.
When I was a lad (I'm60 now) model aeroplane wings were constructed in pretty much the same way. However, they always had a tissue paper skin covering.
I was surprised to see that was omitted by yourself.
Gary Hardman the wings are not finished yet
Wonder if channel wing (or some sort of partial duct) mounted mid-wing would work better than fully ducted or completely unducted props.
James, I think why it isn't going to work is because the wing (blades) aren't covered, so instead of the blades pushing air downwards ,the air will just pass through the openings.this will decrease the lift totally!!!.
The aircraft isn't finished yet..
What a timing tbh. I was searching all over TH-cam about building for rc helicopters, but was not getting anything helpful. Thanks for posting this dude
This is not how you should go about building an rc helicopter
@@willasproth what should I do. I want to build one from scratch completely
Riley Ghost it’s first important to have extensive knowledge of remote control helicopters, even with this knowledge, building a functional scratch build helicopters is extremely difficult. There precsion machines with little room for error. Needless to say you’ll need precision equipment. If you want my opinion on how to go about doing it, I would say no, but if you’re looking to make helicopters that looks a certain way; I would suggest buying a prebuilt model and giving it a new skin of balsa or vacuumed for plastic, or some other combination of light weight materials.
Riley Ghost also great option is build kits with come with most of the necessary parts. www.hobbytown.com/rc-heli-kits/c382
I could imagine the fans are more efficient when mounted to the end of the wings. Since they make more distance per revolution they operate at higher air speed. That might make them more efficient.
that's true, but at the same time when the rotational mass is nearer to the center the propeller can spin a lot faster. it'd be interesting to see what's the best
Beware if the tip of the blades go supersonic. It will end VERY badly
But I think you have sufficent room with the speed so you could go higher if you want ^^
But goodluck anyway! Very interesting!
Good job young man.
I think, if you use some stracture for infrastructure of motor in far distance from the center you get best results.
What happens if you keep the edfs at the wing tips and make them spin the same direction as the tip vortices?
This is looking really promising! Can hardly wait for the next installment. I’m curious as to how you set the pitch on the rotor blades...? I always struggle with setting accurate pitch on my scratchbuilt helis. Great work!
I didn't really show it for some reason in this video but the spacers that separate the disks of the rotor hub have square holes offset at 7 degrees so that the entire wing, when inserted into these holes, is set at a pitch of 7 degrees. ☺️ Thanks!
@@Project-Air Ooooh hey that’s a nice way to do it. 👍 Thanks!
It's like watching a news reel for 1900 of flying machines and it's inventor,,,,, except in color😀😀😀
Autogyro next!
Hey dude, maybe these two EDFs are to close each other, it can be causing some kind of turbulence wake...
And further you place de EDFs from the shaft easier you’ll produce torque due to leverage effect...
Hello, I have a question. Can you use a Flysky receiver with a different transmitter or do the have to both be Flysky? Thanks a lot.
I think the helicopter needs a vertical stabilizer (rudder) ,not for controls but for stability due to the different ways helicopter s flies from other aircrafts
Have a look at the Fairey Rotodyne I think you will find a lot of very useful information
Plus that thing is as MAD AS A HATER you just got to love it
I wonder if tilting up the motors will improve lift. Btw super vid
Using directional thrusters can work for changing the helicopters attitude, but you've got to realise that you're applying a force to a rotating mass, so you'll have to contend with gyroscopic procession. Smarter everyday made a video series on the physics of helicopters that I can recommend.
Good point 🤔 Might have to go for some quite large motors then 😂
@@Project-Air that or just make sure you're applying force 90° ahead of where you want it to take effect
Bear in mind though that Smarter Everyday attributed a lot of it to the gyroscopic effect, which isn't correct for helicopters. It's a similar effect, but gyroscopic forces actually play a very small part of the overall equation for a rotating helicopter blade.
Awsom
Bravo James! I am cooped up as well here in SC, USA. I've been biding my time building aeroplanes and awaiting this video. Though I'd like it to have been longer, (what she said) it was great to get an update as well as seeing the direction you have taken. If you come over for any reason it'd be cool to meet you. I'd say Joe Nall, but probably not happening this year. Be well and safe!
Thanks Joseph! Glad you enjoyed the video. 👍
I left a second comment but so not see it. I watched a vid with Tom Stanton where he used super capacitors to quick charge and run an rc dragster. I'f like to see you make a drop plane, ie Bell X1 or X15, drop it and use the capacitors to run it, like in the speed record runs, and glide it in. Perhaps do vertical take off and glide in. You could revisit the space shuttle, however I would enjoy seeing it as a pusher not a tractor. Whatcha think?
@@O.L.D_RC I like it! I've actually been designing a large rocket plane to do an x-15 type project, so maybe it could be done at a similar time 👍
👍👊
Should I post some safety glasses to you? :D
Watch the Blade tips pass a Single Point. they ALL NEED to be in the same Plane of travel.Right now they are all different. At speed it will shake itself apart.
Why are you 4-blade rotors of different length? The 2 blades that have the electric fan thrusters are the same length, but are shorter in length than the other 2 longer rotor blades. How come you do not have any skin film covering the rotor blades???
You are a real inspiration
But But, However, Motors may not provide enough torque because they are very close to the middle section. So the motors can spin faster if they are far from the middle section
Put the motors in the center of the wing.
Why did you move the fan prop inwards instead of the tips.
Think it will always have a vibration because not every wing will produce the same amount of lift
Surprised when checking for vibration you didn’t use the standard Tyrannosaurus Rex detector
Why there wasn't a fan at tail just like others helicopters ?
The rotors are not being driven from within the air frame.
@@frackcha ohohohohoh l get it
Thanks
This is a great project. Just wondering, once you lift into a hover, how do you plan on dealing with torque. Maybe I missed something, but I did not see a tail rotor or counter-rotating rotors. Really enjoy your videos. Thanks for all your hard work.
There is no torque when the propulsion source is located on the rotor blades, see Fairey Rotodyne.
en.wikipedia.org/wiki/Fairey_Rotodyne
yes good idae
This helicopter could be cool stick at it. Quad control system sound truly originally, go for it. Don't like the extra arm for motors. Why not try positioning halfway. Not at the tip, not at the rotor head? 😷
You have to put the wings articulated, otherwise as soon as you start flying forward it boomerang effect and goes crazy.
www.youtube.com /watch?v= _BBxV9VUKoA
Is it really a tip jet if the jets are not at the tips of the blade?
check blade weights and tracking.