Hi Bobby:
So in both cases of RSC Mode 1 and 2, the systems is looking for a signal on Input Channel 8.
In Mode 1, after arming, Arducopter will pass-through the Ch8 signal to the RSC. I’m currently using this on all my ESC’s with YEP ESC’s (YGE clones). I allows me to have Ch8 on a knob so that I can vary the RPM in-flight. I also have a switch setup on my radio which operates like a Throttle Hold switch. When it is “down”, it cuts the Ch8 signal to minimum. When it is “up”, it sends a Ch8 signal according to my knob position.
So, the operation is simple. Arm the heli with the Throttle Hold switch “off”. Then flip the TH switch up, and the motor achieves the target speed using the governor mode. When I’m done flying, you simply flip the TH to off, and wait for the blades to wind down, then disarm.
Mode 2 is somewhat similar. The only differences is that it is only looking for Ch8 to be “on” or “off”. When it’s off, it sends a low signal out to the ESC. When it’s on, it sends the RSC Setpoint value to the ESC. Otherwise, operation is the same. Arm with TH on Ch8 off, then flip up the TH switch. After landing, flip off the TH switch, then disarm.
I originally played with not using Ch8, and instead, had it like for quads where, if the collective stick is all the way down, it kills the motors. But this led to two crashes for me, when I unintentionally shut the motor off inflight, and then they take too long to restart.
I also believe it is a safety issue that the pilot needs to be able to shut down the motor easily and quickly in any condition. So, we have to use a channel to accomplish this.
Cheers,
Rob