Turbo Prop, Turbo Jet and Turbo Fan Relative Performance Flashcards
1
Q
The efficiency of an aircraft engine is expressed by…
A
(Power output ÷ Power input) × 100 = % Efficiency
2
Q
What is the propeller engine efficiency expression?x
A
Propeller Thrust × TAS
3
Q
What is the formula for Jet Thrust?
A
M X (Ve - Vi)
4
Q
What is the by pass ratio equation?
A
By-Pass Mass Flow / Core Mass Flow = By-Pass Ratio
5
Q
How is fuel converted into propulsive energy?
A
Conversion of fuel chemical into gas power
Conversion of gas power into propulsive power
6
Q
What are some large jet aircraft differences?
A
High momentum
Large weight range
Large CofG range
Low drag - difficult to slow down
Poor low speed lift
High speed compressibility effects
High altitude buffet margins
