Recall that the signal from the RC receiver IS NOT THE PWM we are familiar with. It is a string of a sequence of pule width encoded data. So using it is a bit more complex. THAT is why I made my suggestion.

 

Recall that the signal from the RC receiver IS NOT THE PWM we are familiar with. It is a string of a sequence of pule width encoded data. So using it is a bit more complex. THAT is why I made my suggestion.

You are correct. The R/C PWM system really is pulse width modulation (1.5 to 2.5mS) of a series of pulses in a fixed frame rate (18mS). What we refer to as PWM to control motor speeds is actually pulse proportion modulation (PPM).