Propeller

Question 1

What is the type of the propeller?

Answer 1

content speed, controllable pitch and full feathering, hartzell Propellers,

Question 2

How does the propeller work? Oil and spring/nitrogen connection

Answer 2

Oil pressure sends the propeller to high RPM, unfeather spring pressure sends the low RPM/feathered position

Question 3

How much time does it take to feather the propeller?

Answer 3

6 seconds

Question 4

What is feathering lock?

Answer 4

Operated by centrifugal force.
prevents feathering during engine shutdown (less then 800)

atches lock the propeller in the low-pitch position as the propeller slows down at shutdown.

Question 5

Why RPM 800 is important during engine feathering?

Answer 5

feathering lock engages and makes it impossible to feather the engine

Question 6

what happens to the flight weights when you pitch down and increase the speed of the crankshaft

Answer 6

1) Flight weights will spin to outwards because of the centrifugal force
2) This will result the pilot valve to go up
3) This will allow oil travel out of the hub
4) Propeller will go to higher angle of attack
5) this will slow down the engine which will stabilize the engine RPM
6) Flyweights go back to original position when the centrifugal force and spring tension equilibrium

Question 7

how does the propeller act when we pitch up?

Answer 7

1) Flight weights will go in ward because of centrifugal force
2) This will allow oil back to the hub
3) More oil will result in more RPM Less pitch
4) This will help the bring the fly weights to neutral position

Question 8

What is speed Spring?

Answer 8

Controlled by the propeller lever (Tension increased and relaxed)
tensioned to balance the fly weights at a specific propeller RPM

Question 9

Flyweights

Answer 9

The “L” shaped flyweights

spins around in a circle, are connected to the engine through gears.

connected to the pilot valve

Question 10

How does the flyweight open or close the pilot valve?

Answer 10

1) engine speeds up, the weights spin faster and fly out due to centrifugal force, lifting the pilot valve up.
2) engine slows down, the weights fall in from pressure from the speeder spring, lowering the pilot valve.

Question 11

What is the default position of the propeller? and Why

Answer 11

Feathered position. If we lose engine in flight or oil, we need less drag.

Question 12

What is the Governor Gear Pump?

Answer 12

boosts oil pressure before it heads out of the governor and into the propeller hub.

better, quicker response from the propeller