iX12 Manual

The throttle hold should be programmed for zero throttle for electric
helicopters, and engine idle speed for fuel powered models.
Throttle hold serves three purposes for heli pilots:
1. Model helicopters can be extremely dangerous if the throttle is
inadvertently bumped. Throttle hold is used when the helicopter is being
prepared for flight. The general rule is never exit throttle hold until the
model is ready for flight and the pilot is at a safe distance.