Robin2:
Stingray:
Writing 90 degrees is equivalent to telling the motor not to move...I think that is only true if the ESC supports forward and reverse. I presume if it only supports one direction that 90 signifies half speed. We have not been told what ESC the OP is using.
I think that 90 degrees corresponds to 1500 us. That would correspond to neutral position for the trigger on any standard radio, and should also be neutral for the ESC. Shorter pulses on a forward-only ESC correspond to braking.