Ok,
In the case of a Pilatus PC-6 B2H2, powered by a P&WC PT6A-34, driving the all aluminium, fully featherable, and reversible four bladed Hartzell HC-D4N-3P Propeller...
There are three controls, from left to right :
- Propeller Control : Normal operation and FEATHER
- Power Lever : IDLE STOP and REVERSE
- Idle Control : HIGH IDLE, LOW IDLE and CUT OFF
My question is, how to reach the Beta ? Do you have to lift up the Power Lever, entering into REVERSE range ? How should the Prop Control Lever be ? ( If I undertood, excepet if it's in feather position, the Beta mode bypass it and don't care of the Prop Control position ? )
If you control only blade angle in the beta between +4° and -12.5°, with which control ? So what is the Ng in beta, it is near to idle or near to full speed, does it depends in HIGH-LOW idle settings ?
I would LOVE someone could clearly answer those questions.
Many many thanks.