Can't get RCx_Option=209 (forward thrust) to work

[William_Walker]

Hi, I am developing a tricopter tilt rotor VTOL. To reduce drag I want to tilt the two front motors instead of tilting the entire vehicle. According to the Quadplane documentation this can be done using the RCx_Option= 209 (forward throttle) and assigning a RC channel to operate the front motor tilt. I can not get this to work. I have a Pixhawk cube orange flight controller and a Taranis X9D 2019 transmitter. I have assigned the right finger controller on the transmitter (RS) to chanel 12. In Mission Planner I can see I can control channel 12 using the RS controller, but it does not tilt the front motors. Below is my log file. Can anyone tell me what I am doing wrong and what I can do to get this to work?

[00000183.BIN - Google Drive ]

RCin:

• ch4=Transmitter Rudder stick
• ch12=Transmitter right finger control (RS)
  RCou:
• ch3=Left front motor tilt
• ch4=Right front motor tilt

Picture of signals:

QHover.jpg

Below is a link to see details of the VTOL tilt rotor vehicle I am developing:

New full scale unmanned winged tiltrotor VTOL

Hi, I am developing a new type of winged tilt rotor vtol, similar in functionality to the Convergence RC model. It is a flying car with 4 large wheels, that uses the body as a wing, So there are no wings to unfold and the vehicle flies just as it is. The vehicle is capable of horizontal and vertical flight. In addition it is amphibious. The vehicle weighs a 150 pounds it is 15’ long 8’ wide and 4.5’ high. It uses 2 counter rotating tilting motors in the front, and 2 coaxial coaxial counter rota…

Thanks, William

[kolin (Miroslav)]

Hi, I have just needed this and figured it out.
Parameter Q_FWD_MANTHR_MAX = 0 by default, so max throttle applied from channel with option 209 is also zero.
Setting Q_FWD_MANTHR_MAX = 70 solved situation for me (I do not need full throttle).

Not sure if it helps after almost a year, but maybe someone will google this and find the answer.