Chapter 26 - Propeller Design Flashcards
(6 cards)
1
Q
If blades increases in length what happens noise
A
increases
2
Q
Power absorption can be increased x4 ways
A
more baldes (more solidity)
Greater mean chord
Contra rotating propeller
3
Q
If a propeller spins clockwise which way will the a/c have a tendency to roll and what happens with rpm increase
A
left
increases
4
Q
What is slip stream effect
A
the streams going back down the a/c created by the propeller act on the fin giving it an AOA
5
Q
Asymmetric blade effect / P effect is
A
When the down going blade is faster and has higher AOA therefore moving the thrust line
6
Q
For the gyroscopic effect what happens for control input
A
a 90 degree precessed happens in the direction of rotation example
pitch up will cause a yaw right on a clockwise prop
