Propellor

Question 1

Prop speed

Answer 1

2000 RPM (100% Np)

Question 2

At 100% TQ, how much TQ is produced at the prop shaft (ft-lbs)

Answer 2

2,900 ft-lbs

Question 3

Three conditions of prop pitch

Answer 3

Feathered, low (flat/fine), high (coarse)

Question 4

What is the approximate blade angle at low

Answer 4

15 deg

Question 5

Prop governing is normally set by what

Answer 5

PMU, PIU

Question 6

What happens to the prop if engine fails with PCL outside of cut off

Answer 6

Slowly feathers due to loss of oil Px, but may not fully feather

Question 7

Power for the feather dump solenoid is provided by which CB?

Answer 7

Prop sys

Question 8

How is the pitch of the prop controlled

Answer 8

PMU controls RPM by varying blade angle with oil pressure through the PIU. Increasing pressure moves towards fine and vice versa

Question 9

Role of the flyweight over speed governor?

Answer 9

Modulates oil pressure to maintain 100%Np (+/- 2%) without the PMU on

Question 10

What will happen with PROP SYS SB pulled, PMU off, and PCL off? (ie uncommanded prop feather BF followed by engine failure)

Answer 10

Prop will not rapidly feather (reset CB)