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28 Cards in this Set
- Front
- Back
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What is thrust required?
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Thrust required to overcome drag
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What AOA is minimum thrust required found?
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L/D(max) AOA
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What is power required?
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Power required to produce thrust required.
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How is power required calculated?
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Product of thrust required and velocity
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What is the equation for power required including units?
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P(R) = T(R) · V / 325
HP = lbs · knots / 325 |
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Where is L/D(max) found on the thrust required curve?
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Horizontal line tangent to bottom of curve
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Where is L/D(max) found on the power required curve?
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Straight line from the origin tangent to the power curve
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What happens to thrust available for a turbojet and turboprop as velocity increases?
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Turbojet: constant
Turboprop: decreases |
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What happens to thrust and power available as density decreases (i.e. altitude increases)?
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Decrease
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What is shaft horsepower (SHP)?
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Engine output
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What is thrust horsepower (THP)?
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Propeller output / usable thrust
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What is propeller efficiency (p.e.)?
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Ability of propeller to turn engine output into thrust
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Where does max thrust excess occur for a turbojet?
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L/D(max)
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Where does max thrust excess occur for a turboprop?
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Left of L/D(max)
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Where does max power excess occur for a turbojet?
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Right of L/D(max)
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Where does max power excess occur for a turboprop?
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L/D(max)
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What is the effect of weight on thrust required curve?
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Up and right
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What is the effect of weight on power required curve?
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Up and right
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What is the effect of altitude on thrust required curve?
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Shift right
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What is the effect of altitude on power required curve?
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Up and right
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What is the effect of altitude on jet thrust available?
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Decrease
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What is the effect of altitude on jet power available?
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Decrease
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What is the effect of altitude on prop thrust available?
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Decrease
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What is the effect of altitude on prop power available?
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Decrease
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What is the effect of landing gear on thrust required curve?
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Shift up
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What is the effect of landing gear on power required curve?
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Shift up
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What is the effect of flaps on thrust required curve?
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Shift up and left
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What is the effect of flaps on power required curve?
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Shift up and left
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