DA-42 Prop System

Question 1

What are the props made of?

Answer 1

Wood and covered in GFRP

Question 2

What do counter weights do?

Answer 2

Oppose centrifugal twisting of blades (fine pitch)

Question 3

What does the speeder spring want to do?

Answer 3

Move the blades to a coarse pitch, or feather

Question 4

What is the oil system in the prop pressurized to?

Answer 4

320 psi

Question 5

When the engine is over speeding, what does the prop. governor do?

Answer 5

Causes the fly weights to move out, and oil leaves the prop hub and goes back to the sump

Question 6

What will happen if you have a failure in the oil pressure system in the prop?

Answer 6

The blades will want to go to a feather position

Question 7

What angle is feathered? (or degree)

Answer 7

81

Question 8

What is the low pitch position/degree?

Answer 8

12

Question 9

What is the Start Lock position/degree?

Answer 9

15

Question 10

What are the two things that are trying to feather your blades?

Answer 10

Counter-weights, Spring

Question 11

What are the two things keeping it out of feather?

Answer 11

Oil Pressure from governor, course pitch stop