Chapter 25 - Propeller

Question 1

On a prop where is the flat side?

Answer 1

Back side facing the pilot

Question 2

What is the axis of rotation

Answer 2

straight through the spinner

Question 3

What is the plane of rotation

Answer 3

Vertical line down the back of the spinner

Question 4

Where is the AOA

Answer 4

Chord line and RAF

Question 5

Blade Angle is

Answer 5

Helix + AOA

Question 6

Helix angle is

Answer 6

RAF to plane of rotation

Question 7

The blunt end shows the

Answer 7

direction of rotation

Question 8

The alpha range is where

Answer 8

Normal from coarse to fine

Question 9

The beta range is where

Answer 9

Outside the normal i.e feathered

Question 10

Geometric pitch is

Answer 10

A distance the the blade will travel in one revolution (this includes effective pitch and slip)

Question 11

A fine pitch angle is good for which speeds

Answer 11

slow

Question 12

A coarse pitch angle is good for which speeds

Answer 12

high

Question 13

A fixed pitch propeller is most at efficient at?

Answer 13

One value of TAS

Question 14

As we increase TAS what happens to AOA on a fixed pitch propeller

Answer 14

decrease

Question 15

As we increase RPM on a fixed pitch propeller what happens to AOA

Answer 15

increases

Question 16

The force acting in the opposite direction to the propeller rotation is

Answer 16

Torque (torque drag)

Question 17

The twist of the blade keeps the AOA the same. what does it do from root to tip

Answer 17

decreases AOA

Question 18

To have a small helix angle which position do we want the propeller

Answer 18

fine

Question 19

Push Rpm lever FWD for

Answer 19

Finer