Hello everyone,
I am currently designing a vtol plane.
Tricopter with 3 tilt servos
The VT333 
3 rotor, 3kg,3h
I am considering not putting servos on the elevator and controlling the pitch with the tilt of the tail rotor.
Do you know if this is possible with arduplane?
Or even better if it has already been done?
Hi Quentin,
welcome to the VTOL area.
With 3-tilt vectored YAW, it is generally possible to support roll and pitch by tilting the front motors using the parameters Q_TILT_FIX_ANGLE and Q_TILT_FIX_GAIN. See Tilt Rotor Planes — Plane documentation
With RUDD_DT_GAIN you can output different thrust at the front motors depending on the rudderoutput.
If you absolutely want to use the rear motor for vectored thrust as an alternative for the elevator, this could be done using a LUA script.
However, the whole thing is very difficult to set up and you should not forget that at zero thrust you lose all rudder effect!
Rolf
IIRC at 0% throttle you have half rudder authority as lower side will be 0 clamped.
I wouldn’t use rear tilt for pitch control in horizontal flight as during transition you will have ridiculous amount of deflection on elevator which is hardly ideal.
1-Making a Lua script is too time-consuming
2- the possibility of conventional landing with zero throttle must be preserved.
There will be a depth servo.
Thanks for your answers
