Looks like zenoah 80cc twin cylinder motors. As a kid I used to be onto gopeds and stuff like that . You may want to look int polini 50cc engines if tuned right with pipe they make around 18hp but the weight you will save would be a big plus . Good luck
Jay Savage Yeah! That makes sense now! Thanks for that! Wow, completely new code must be written for the flight controller. That must be some complex staff since there are two engines (each with slightly different rpms than the other)
BIll Georgoulakis Both the engines are connected to the same shaft via belts, so the RPMs will be matched. The flight controller will connected to servos to control the blade pitch rather than controlling the quad via prop speed.
It is an amazing machine guys. Is it your aim to use cyclic and collective pitch to roll and pitch? In that case how will you manage yaw? Are the two engines paired with two rotors in order to change rpm in both? Sorry for so many questions, I got shocked when seeing your work :)?
Hi, Great project you're working on. Just a guess but if your rotors span 30", the maximum amount of static thrust will be gained at a pitch of 18" (30x18). This is because the max amount of static thrust is achieved at the diameter multiplied by 0.6. That said, with a rotor speed at a nominal speed of of 5600rpm, your rotor tips speed will be at a safe 500mph (well below Mach I, 767mph ASL), you will achieve 137lbs per rotor head for a total of 548lbs at maximum. Subtract the weight of the airframe with fuel, and that will be your max payload. I can hardly wait to see what you achieve. All the best!
Hey Ron, I like your leads and ideas. However, can you please explain how did you get 137lbs per rotor head? Don't you not have to know the (horsepower) power? Also, did you use diameter of 30" to calculate the wing tip speed... if so, why that and not the diameter of 18" which is the diameter of the propeller? Thanks a lot!
The aluminum tubes, If I were you, I would mount them on mill with a 4th axis, and drill a spiralling hole pattern all over them to drop as much weight as possible.
First of all, Great Job !!! It looks awesome My only concern would be Yaw control . On electric models the Yaw is controlled by the speed differential of counter rotating motors? I Can see how you can control Pitch and Roll by manipulating the pitch on the blades but since all of the booms will be spinning at a constant rpm of each other, Yaw might not be possible. Curious to see how it flies. A tricopter of even Pentacopter design might be worth considering if yaw is not available.
Franco Giambona As the pitch of the blade increases, then lift increases, but drag also increases creating an equal but opposite torque on the platform. So but increasing pitch in the blades spinning one direction and decreasing in the other, you can get an imbalance in torques and therefore a yaw movement without changing the overall lift.
+Incredible HLQ Still makes no sense to me. As the pitch of which among all the blades increases? Also, where exactly are you referring to where you say drag increases? "Increasing pitch in the blades spinning in one direction" aren't they all spinning in the same direction? Also explain that "inbalance" of torques. Thanks
+masso172 2 rotors are going clockwise and 2 anti clockwise, just like an electrical quadcopter. By increasing the pitch on 2 rotors and decreasing on 2 others you will be able to 'yaw'. Just think of a helicopter, when they are on the ground with 0 pitch, the tail rotor has very little work to do, but when the pilot changes the pitch of the blades (take off) the tail rotor will have to work a lot harder to keep the heli from yawing.
Good morning, 4 days ago I made a request and the amount you buy gave me free fast shipping, which is done in 3-4 days, but now I check the status of my order just shows me that day 16 / 06/2015 you will be sending, need to know why this taking so long time shipping, if you request products told me they processed within 24 hours. I look forward to a prompt response. Thank you.
You're losing a lot of lift with those fat spars being in the way. At least a third of your airscrew lift/flow is pushed into the spars, creating eddies and vortices.
Very stupid mechanical construction..... - With high torque of the motor (and low speed), the rays should be several times longer! -A lot of heavy metal
very nice!! cp control i take it.i see your very good at building things i take my hat of to you.now then i do not have the means to play like this so if you have the time means and inclanation to. what about using those engines to drive through gears to brushless ? brushed motors as genarator's then to capasitors to esc's to brushless motors with fixed props and run a flight controller dont know if this would work but if so then scale it up and ill ride it LOL!!!!!!!!!!!.
!! hola, esto viendo este vídeo, y deberás me da pena ajena..por qué es que han surgido tantos inventores locos por ahí que ellos asen volar su inche imaginación y inche dinero, e endejadas que ya están inventadas, juegan a se inventores, inche locos y bipolares, mejor inversión es en otras cosas..?
Good evening, I'm putting a drone also gas , however 'm doubts on electronic ignition. How they used to control two motors shown in the video ? I am using 2 chain saw engines and need to connect the two engines on the cdi with the starter to connect the two at the same time ? Thank you
Very cool project, BUT, first of all - how are you gonna control every and single one of the propellers? Second: Those engines have a buffering time for responding to your commands, and that is not "so" bad, but the same is for the Flight Controllers commands, and unfortunately it stays unstable in air. My opinion: you need one of the 8 KW 3-phase motor to bind it to your engine as a el.generator, and with 4 el. motors on every drone arm you could provide lift and control the drone.
@@CSparzo Yeah, it could be with the pitch control, but they haven`t made it yet. Maybe they would in the future. I have a feeling that with those two engines working unstable (with changing rotating speeds - what could be heard from the audio) this drone /if it flies/ will jump around in the air. They need a stable thork. But I would like to stay as an optimist, because I like what they have acchived. And btw, except flying videos, that could be almost all what I could expect from this drone, because I wouldn`t like it in my neighborhood, it is so crepe laud, can U imagine flying above your house a couple times a day.... But I will repeat - this is very nice project, BRAVO for such a engineering.
We don't need to control the speed of every rotor because we change the pitch of the blades instead. This allows the quod to use its inertia to steady the rotor speeds while going through higher loading situations while the blade go into a steeper pitch and the engines catch up to stabilize the rpms. It also allows much more responsive control than we would have otherwise. The generator idea is a good one, but it is borderline of wether it would provide any beneficial weight savings. It would certainly be mechanically less complex, but perhaps at the expense of more mass due to a significan't amount of copper you add in the form of electric motors.
@@Incrediblehlq Well, I hope you are right, I will stay as an optimist. From my experience - pitch control isn`t cheap solution :-/ especially for the little rotors in a WINDY day - when stability, trim compensation (our of atti-mod), moving progression (in desired direction) and the wind are vectored :( . I wish you luck, you are gonna need it. I suppose that the other engine is for the redundancy? or I am wrong? I am hardly waiting for the next video :)
@@darkodimitrijevic8496 Both engines provide power at the same time to a single shaft through one way bearings. If on engine is faster than the other, it cannot hold that rom, and so slows down until the other engine is at the same speed and then power is balanced between the two. In the testing we have done, it seems to work decently well, but we have only done a somewhat flawed tethered flight test so far. There is some talk among the team memebers to perhaps start up some work on it again this summer, but with current world conditions, this may not be possible until a later time.
Green Silver We are hoping to get a half hour run time per gallon of fuel, but this number is based on fuel consumption specs from the engine manufacturer. We have no idea the condition under which they got their numbers, so really don;t know with any certainty what kind of flight time we will get. As we do some ground testing, we will likely get a much better idea.
This is awesome experimental build. At some scale it might make sense to pursue the most weight efficient gas generator/charger. Would take some custom charger tech to do right, I think. You could then simply use a 'traditional' quad tech/structure elsewhere, and it's accompanying simplicity advantages. Plus you'd have a short battery flight reserve. If you could get the gen/charger, gas, and small battery to weigh no more than regular batteries, you might get some real energy density gains. Or this idea may already have been found to not be that much help. The concept I present is of course not new. If it does help we there may even be some examples of such already built, idk.
Incredible HLQ Epic work gentleman, I bet the getting the timing right was fun :P. I wonder if using a timing gun and some math would balance this puppy. (EDIT: Oops, sorry saw the timing gun LMAO, carry on I'll shut up now.) *I think some ONE WAY BEARINGS would really spice this thing up!!!*
USE EDF electric motors AND buy a Tesla Power Wall battery. In fact, Buy 5 batteries and used approx 170 EDF electric motors mounted in formation with necessary space in-between. 170 should give you 100 Kg of extra lift, i.e. rideable. //Erik S
erkanen But the TPWB's weigh 100kg, and finding the right point to mount it will also be an issue, as if too high, it'll create topple and if too low, it'll create a huge pendulus period. That will also fight the pitch and roll inputs from the airscrews.
Are the engines staying cool? Looks like they will be prone to overheating unless you direct a fan at them especially in a hover. You are breaking a lot of ground at one time with this project. Bet it is a big challenge. And expensive it if flops over on its back like my Quads always do on the first flight. I hope you can make it work. I would like to see it fly.
Hi Rich. We expect the rotors/blades to reach just under 3000 rpm at maximum throttle. We have a 3 to 1 step down from the engine which means engines will spin at a max of just under 9000 rpm. We are using the Align 435mm blades which puts them in the 500 class I believe.
how will you calculate the thrust,how will you know if the engine is capable of lifting the weight.is there any formula or some thing.and how will it pitch forward without variable speed.
sometimes the simplest things can make the biggest problems go away. the use of hose for the landing is friggin brilliant . it absorbs impact etc etc etc, wow cant wait to see this gnarly bitchin chopper fly.
yes....great job..but .my bet is gonna be a quad (hexa,octa) copter which electric motors are gonna be fed by a gas turbine-electric generator on board...
How do you control the speed of the motors?? I mean, with electric brushless motors you use esc and connect it to the flight controller, how do you connect this to flight controller??
nice work. Do it have clutch between the engines and the main center shaft? For safety reason, i think it should have. Same thing like turbine, gasser or nitro helicopter. Then add some safety brake use when starting the engine.
You may want to add parachutes and program it into one of the channels on the transmitter. Just in case it stops abruptly in the air. Nice engineering though. I'm inpressed with the effort.
Jacob Bond We are using the Ardupilot APM2.5+ controller. But we have an additional arduino to handle the engine control and a raspberry pi on board as well for image capture and possible future computer vision implementations now that the new Pi 2 has been released and has some more computing power.
*I think some ONE WAY BEARINGS would really spice this thing up!!!* I bet it's crazy difficult trying to get it so the motors work together, and aren't tugging on one another. *Some kind of clutch system might make warm up easier.*
If you watch the beginning again you will see each engine has its own pulley but each drives the blades , not sure if I explained that correctly or not.
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