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14 Cards in this Set
- Front
- Back
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Define service ceiling
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No greater than 100 fpm
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Define single engine service ceiling
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altitude at which no greater than 50 fpm can be maintained
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What 3 factors determine critical engine?
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P-factor
Accelerated Slipstream Torque |
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Define P-factor
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descending blade creates more thrust than ascending = asymmetrical thrust on each side of prop
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Define accelerated slipstream
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the spinning props accelerate the air going over the airfoil, producing more lift there
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What is torque in relation to ME aerodynamics?
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Torque is when the prop creates a force opposite rotation due to Newtons third law, adding to or subtracting from resulting yaw in a conventional twin
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What is Vmc?
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minimum control speed with crit engine inoperative. minimum speed to maintain directional control
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What are the four warning signs of Vmc?
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Loss of directional control
Stall warning horn Buffeting rapid decay of control effectiveness |
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What effect does power have on Vmc?
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more power, more yawm Vmc up
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Temp increase/ pressure decrease on Vmc?
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Vmc down, less dense, less power, less yaw
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What effect does a windmilling prop have on Vmc?
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Vmc up, more drag, more yaw
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What effect does an aft CG have on Vmc?
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Vmc up, less distance between CG and rudder = less effectiveness
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Heavier weight on Vmc?
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Vmc down, more weight = more lift
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What effect do flaps have on Vmc?
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Vmc down, because more induced drag on good engine side prevents yaw
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