ORIGINAL: aghost
'' Engine at full rpm with with transmitter stick at half throttle. Going to try adding expo to slow throttle. Never tried this before.''
harley, don't know what Tx you have, but my Futaba has a throttle curve feature. If your Tx has it, that feature probably works better than using expo on a throttle.
Brian
Thats just a poor set up with the geometry of the servo arm and throttle arm on the carb.