for sprung throttles the user should center the throttle

[tridge]

it would be even better if there was a tick-box for sprung throttle and it automatically set the right option bit for the vehicle type. For example, on plane you would set FLIGHT_OPTIONS bit 10.

[rmackay9]

In Copter the equivalent parameter is PILOT_THR_BHV and it's the first bit (bit0).