Safety and Fundamentals Flashcards
_______ is the flat part of the blade that faces the pilot.
Blade face
Convert engine brake horsepower to thrust horsepower.
Purpose of propeller
The propeller is able to convert about ____% of the brake horsepower to thrust horsepower.
85%
______ is the difference between the Geometric and Effective Pitches. The less the losses the more efficient the propeller.
Propeller Slip
________ is the distance the propeller should travel in ONE REVOLUTION THROUGH A SOLID (no losses).
Geometric Pitch
______ is the actual distance the propeller travels in one revolution through the air (friction drag & weight).
Effective Pitch
______ prop located front end of an engine and PULLS aircraft forward.
Tractor Propeller
______ prop located aft end of the engine and PUSHES aircraft forward.
Pusher Propeller
How does a propeller rotate?
Engine power into thrust
Birch ash oak black cherry black walnut
Woods used for propeller
When we select the wood, what should we do first?
coat with tough protective layer of RESIN
____ converts rotational engine power to thrust in both reciprocating and turboshaft engines.
Propellers
How do we protect the propeller?
Alodining - chemical bath
Anodizing - chemical bath with electrical stuff
Most effective angle of attack for a prop blade?
2 and 4 degrees
Stalling degrees on prop blade?
If exceeded to 15 degrees