Today everybody and their dog seem to be working on a quad project. And with my own quad having reached a relatively mature stage with stable flight some time ago, I thought it would be nice to try something different.
So inspired by the full-size Osprey tilt rotor design I just started an experimental duo/tilt copter build. Frankly I am far from sure if it will ever fly, but that is what makes it fun!
Mechanical:
My tilt design is one I used in an earlier tri-copter build. I insert a 8mm CF rods into a 750x10,5mm CF square tube and glued then together. A modified T-Rex 600 blade-holder is then inserted on the 8mm tube and fastened using glue. Finally a servo is epoxied at the side of the square tube and linked to the 600 blade-holder. Motor and ESC is a cheap TowerPro combo from HobbyKing. Cheap and easy to replace when experimenting, and the ESC has no problem handling 333mhz PWM pulses.
Hardware / software:
For control and stabilization I will use the same hardware that I used in a Quad I built earlier. A FASST R617FS receiver modified with PPM output, and the ArduIMU V2 board with custom software for stabilization and servo/ESC control.
Main body / tail:
I have yet to decide what I will do for a main body. At the very least I will need some kind of tail with a lift surface to get some balancing momentum in the pitch axis, and tail drag when in forward flight. Lots of fun experimenting to be done!
Parts:
Carbon Fiber Square Tube 750x10.5mm
Carbon Fiber Tube (hollow) 8x750mm
Align T-Rex 600 Blade holders and bearings
Turnigy S3101S Servo 17g / 2.5kg / .14sec
TowerPro BM2410-9T / 18A BEC/ 1047 Prop Combo
Futaba FASST R117FS receiver
ArduIMU+ V2 (Flat)
Comments
great work! thumbs up! ;)
i'm trying to make a bicopter without control board, and since i'm new to RC, i'm unable to understand if its right to connect two esc's to a single battery,...and i want to know how to setup FLYSKY FS-T6 for a bicopter.. with channel mixing for servos...
please help me out... i'm done with the fabrication of the model.. all thats left is the electronics setup :)
As mmormota points out, I suspect you may have longitudinal control issues in hover (if you consider your craft to be oriented like a V-22). Symmetric rotor speed gives you thrust control, differential RPM gives "roll", differential motor tilt gives yaw control, but how do you generate "pitching" moment without cyclic blade pitch control or a separate (lifting) tail rotor?
Unlike a quad, you may also have to deal with inter-axis coupling (which could improve if you use the couter-rotating rotors, as Darren (and james Cameron) suggest
- Roy
Was thinking of going for something along one of these... Which may give you some ideas on the tail.