now this is a quad I would put down my tricopter for http://youtu.be/uuExXFCCDgA (http://youtu.be/uuExXFCCDgA) well maybe for a short time
I like it and would love to know the drive systems used :D
It certainly works well
dizzy :)
Just think put a huge fuel tank in it and go for some uber long range stuff ;D
Quote from: Dizzy on January 27, 2014, 12:57:41 AM
I like it and would love to know the drive systems used :D
It certainly works well
dizzy :)
It is a shaft drive going along the fuselage and belt drive going to a tail rotor mechanism on each arm.
To get the counter rotation there is a twist in the belt.
It is meant to be a lot like flying a collective pitch heli.
/Steve
Sent from my C6603 using Tapatalk
I agree.
I think engine is connected to system of drive belts that transfer propulsion to rotors. All rotors have exactly the same RPM. They would be all variable pitch, like tailrotors in standard heli with pitch controlled individually by small servos.
IMHO disadvantages would be as follows: higher cost, more weight, much more complexity and much more things to break. It would have to inspected thoroughly after every flight.
The only advantage I see is that fuel is more energy dense per weight than batters, but then small hobby motor could be so inefficient that there would be no benefit. Hard to say without any numbers.
It would be interesting to know how much flight time he gets. Wet/dry weights, payload capacity and fuel consumption rate.
Weight? Not much more, The CP system is probably like a heli and most likely uses 9g servos. These can go to much better angles than a normal quad!
Liam
What a ghastly contraption. I mean it's neat that someone has made it as a technical exercise but beyond that I can't see the point. If you want to fly LOS 3D aerobatics then a normal helicopter is better and for FPV all it seems to offer is the ability to fly upside down. This offset by the massive vibrations from an IC motor, the fact that any sort of arrival that wasn't optimal is usually going to break something, cost, complexity and a horrible noise.
Its made by curtis youngblood, they have a electric version:
Flite Test - Stingray 500 - REVIEW (http://www.youtube.com/watch?v=TnGhEInTXYc#ws)
That FPV racing would be epic.
Quote from: Loopdreams on January 27, 2014, 09:29:07 AM
What a ghastly contraption. I mean it's neat that someone has made it as a technical exercise but beyond that I can't see the point. If you want to fly LOS 3D aerobatics then a normal helicopter is better and for FPV all it seems to offer is the ability to fly upside down. This offset by the massive vibrations from an IC motor, the fact that any sort of arrival that wasn't optimal is usually going to break something, cost, complexity and a horrible noise.
Could not agree more. It is indeed very clever, but people (inc. me) fly helis, because they are helis. We like having a model.... heli...... a replica of a .... heli.... :-) Love the way they fly, and the challenge of mastering them
I fly quads too because I want a stable, cheap, reliable, easy to fly, stabalised camera/fpv platform.
I don't want my quad to inherit characteristics of a heli. Not at all.
I guess that reducing the pitch on one rotor is going to reduce the torque and so induce yaw in much the same way as slowing it down on a fixed pitch one.
Quote from: Clunk84 on January 27, 2014, 06:30:45 PM
I have been toying with the idea of a collective pitch quad using one motor and four tail booms etc but I can't think how to get it to yaw?? Does anybody know how this is done?
As Loopdreams said, you pitch up two rotors on diagonal while pitching down other two on other diagonal. Rotors with higher angle of attack will put more torque on the frame and "win" with ones that are pitched down resulting in yawing the aircraft.
well I only posted vid cos its nice to see a quad actually flying instead of hanging around at 200ft flattening the battery until naza decides to bring it back home. Still toying with the idea of making one though I.E four sceadu tail booms with tail gear and belts motor with 4 pulleys mmm! off to the shed..... till then its back to the tri's. bye
Yeah the design has they benefit told such as being able to auto down! A kk2 would be fine as the cp could be in the throttle channel and using heli mode on the tx it should work, listen to flite test podcast 6 and e goes into detail in how it's all set up!
Sent from my iPhone using Tapatalk (http://tapatalk.com/m?id=1)