Multi Engine Aerodynamics Flashcards
1
Q
What determines if an engine is critical?
A
P
A
S
T
2
Q
What are the drag factors when in OEI?
A
Full Flaps - 400 FPM
Windmilling prop - 400 FPM
Gear Extended - 150 FPM
3
Q
What are the Four warning signs that Vmc is occurring or about to occur?
A
- Loss of directional control - the rudder pedal is depressed to its fullest travel and the airplane is still turning towards the inoperative engine
- Stall warning horn - could result in a spin
- Buffeting before the stall - same reason as the stall warning horn
- A rapid decay of control effectiveness - any loss of control effectiveness could result in a loss of control of the aircraft
4
Q
To recover from Vmc, what two actions must occur simultaneously?
A
- Reduce power on the operating engine - this will reduce the asymmetrical thrust causing the Vmc in the first place
- Pitch down - lowering the nose of the airplane will increase the forward airspeed making the rudder more effective in regaining and maintaining directional control
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