Multi Engine Aerodynamics Flashcards

1
Q

What determines if an engine is critical?

A

P
A
S
T

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2
Q

What are the drag factors when in OEI?

A

Full Flaps - 400 FPM
Windmilling prop - 400 FPM
Gear Extended - 150 FPM

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3
Q

What are the Four warning signs that Vmc is occurring or about to occur?

A
  1. Loss of directional control - the rudder pedal is depressed to its fullest travel and the airplane is still turning towards the inoperative engine
  2. Stall warning horn - could result in a spin
  3. Buffeting before the stall - same reason as the stall warning horn
  4. A rapid decay of control effectiveness - any loss of control effectiveness could result in a loss of control of the aircraft
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4
Q

To recover from Vmc, what two actions must occur simultaneously?

A
  1. Reduce power on the operating engine - this will reduce the asymmetrical thrust causing the Vmc in the first place
  2. Pitch down - lowering the nose of the airplane will increase the forward airspeed making the rudder more effective in regaining and maintaining directional control
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5
Q

As density altitude ____, Vmc speed will ____. Why?

A

increases, decrease. Because less engine power at higher density altitude = less asymmetric thrust = less yaw towards dead engine = lower Vmc

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