Operational Factors Flashcards
Vef
Velocity that critical engine is assumed to fail
V1
Minimum speed for takeoff and achieve the required height above takeoff surface
Vr
Rotation speed
V2
Single engine climb out speed
Accelerate stop distance
Distance required to get to V1 then come to a complete stop
Rotation speed and accelerate stop distance get greater when weight gets….?
Greater (directly related)
Can you use the stopway of a runway to stop during an aborted takeoff?
YES
Explain how a jet engine works in simplified terms.
Intake, compression, power, exhaust (Suck, squeeze, bang, blow)
What is the most important limitation to a jet engine?
Limited exhaust gas temperature
Where is the highest temperature in the turbo jet engine?
Turbine inlet section
How do you measure the horsepower in a turboprop engine?
Equivalent shaft horsepower
If you have a decrease in outside air pressure and outside air temperature, what is going to happen to the thrust output of an engine and why?
The thrust output will become less because of the air being less dense.
How do you get maximum range performance out of a turbojet engine?
As weight is reduced, you will increase altitude or decrease speed.
Where do you get minimum fuel consumption? (Altitudes)
25,000 to the tropopause
What can cause compressor stall? (3 things)
Dirty blades
Ramming the engine
Volcanic ash
What is an indication of a transient compressor stall?
Intermittent light bangs
What is an indication of a compressor stall?
Strong vibrations and a loud roar
What should you do if you think you have a compressor stall? (3 things)
Reduce fuel flow
Reduce angle of attack
Increase airspeed
What prevents turbine engines from developing compressor stalls?
Compressor bleed valves
What causes the most severe wear and tear on a reciprocating engine?
High MAP and low RPM
What does high relative humidity do to the density altitude?
It increases the density altitude
What does a wastegate of a turbocharged engine do?
Controls the exhaust gas discharge
What is critical altitude?
The highest altitude at which you can get the maximum horsepower out of the engine.
If the pitot tube and the drain hole get clugged, what happens to the airspeed indicator?
It turns into an altimeter. The higher that you go up, the higher the speed.
If the pitot tube becomes blocked, what happens to the airspeed indicator?
The airspeed will drop to zero.
What is station pressure?
It is the actual pressure at field elevation.
What is the altimeter setting?
It is the station pressure corrected to mean sea level.
Corrected altitude
Indicated altitude corrected for non-standard temperature
Explain hot to cold and high to low, look out below
When flying from hot temp to cold temp, the indicated altitude will actually be higher than the true altitude.
If you have too big of a number in the kollsman window of the altimeter will the indicated altitude be higher or lower than the actual altitude?
Indicated altitude will be higher
If the OAT is higher than standard, will density altitude be higher or lower than pressure altitude?
Higher
Compass errors are caused by what?
Magnetic dip
UNOS
Undershoot North
Overshoot South
ANDS
Accelerate North
Decelerate South
If you are in a turn into a 360 degree turn, when will the compass read most accuratly?
90 (East) and 270 (West)
What are two ill effects of ice, snow, frost?
Increase the stall speed
Decrease the angle of attack at which a plane stalls
Frost can…
Reduce lift by how much
Increase drag by how much
30%
40%