How do you guys recommend setting up the radio failsafe? If Channel 8 goes low won't the motor shut down? The pixhawk won't be able to control altitude with "throttle"/collective with no power. Do you recommend setting the receiver to maintain channel 8, center the other channels and set channel 5 to something like RTL. I read that is not recommended but seems like the only option for helis. Thoughts?
Sincerely,
PBL
Replies
Patrick, Test it with the blades off. If channel 3 goes low and all others hold their last known position I think you will be ok. Remember the Pixhawk is looking at channel 3 input to determine if a failsafe should be invoked. Honestly though I don't remember if I preset all my channels or if just 3 goes low and all others use last known. It works though.
Regards,
David R. Boulanger
I currently use the "PWM Output Off" setting in my Rx to trigger failsafe, as it's actually the simplest and usually the best choice for Arducopter. But honestly, I haven't tested this functionality in a long time and I really should. I expect it will be fine, as the motor will only shut off if the Rx sends a Ch8 Low signal, which it shouldn't do. It should just shut off the PWM, so the logic won't shut off the motor.