I have configured my throttle (Hotas Warthog) with one controller assigned to "Throttle" and the other to "Prop". This is perfect for airplanes.
With all the helicopters, the "Throttle" is mapped to the torque, which is perfect, but the prop control is not mapped to anything. In order to control the power of the engine, I can only use F1 and F2 keys (Throttle up/down a bit).
To which X-Plane control shall I associate a controller in order to control the helicopter throttle (engine power)?