Systems

Question 1

Where is torque measured on the PT6

Answer 1

Engine torque at the propeller shaft is sensed by a transducer located inside the first stage reduction gear housing

Question 2

The engine instruments are powered by what

Answer 2

The triple fed bus on 28vdc power and are protected by circuits breakers on the fuel control panel.

Question 3

The rudder boost system is available to what?

Answer 3

Aid in maintaining directional control in the event of an engine failure or a large variation of power between the engines

Question 4

What is P3 Air?

Answer 4

P3 air from the compressor stage of the turbine provides cabin pressurization, heating the cabin and cockpit, operating the instruments, rudder boost, and de-icing

Question 5

Explain the electrical system

Answer 5

28 VDC 42 amp lead acid battery two 250 amp starter generators 
Hot battery bus
Left gen bus
Right gen bus
Center bus
Triple fed bus

Question 6

What does the GCU do?

Answer 6

It provides voltage regulation, over voltage, paralleling, reverse current, cross current limiting

Question 7

Explain the fuel system

Answer 7

Fuel is delivered to each engine