Flight Ops Flashcards
What’s a main advantage of an axial flow compressor turbine compared to a centrifugal type
smaller frontal area
Engine Pressure Ration (EPR) is correctly defined as…
the ratio of turbine discharge total pressure to the total pressure at the compressure inlet.
What are the 2 options for reverse thrust on large turbofans?
- pivoting blocker doors to deflect fan airstream forward
- diverting air through cascade vanes on the side of the engine cowling
While in BETA, the power lever controls both…
fuel flow and prop pitch
What does the dafety out-flow valve do for the aircraft pressurization system?
prevents excessive pressure within the aircraft.
What does a negative pressure relief valve do?
prevents the outside air pressure from becoming more than the internal cabin pressure.
What does a hydraulic accumulator do?
- absorbs power fluctuations or surges in the system
- stores system pressure to provide backup in case of pump failure
What do aircraft use to compensate for variable system demands in the hydraulic system?
use variable displacement hydraulic pumps
Describe how an anti-skid system works?
anti-skid control module detects wheel speed is lower than the reference speed and sends a signal to release the brakes.
Induced drag is ___ proportional to the ___ of the speed.
inversely, square
When operating an aircraft in the slow flight speed range, the required power is greater than that for endurance because…
the L/D ratio is reduced and the drag increased
In order to maintain maximum range in constant winds, a pilot flying a turbojet should…
reduce power / indicated airspeed as fuel weight decreases
To double the speed you need to ___ the thrust.
quadruple (x4)
Name a wing feature that will improve lateral stability
dihedral
If a dihedral wing drops, the aircraft must first develop a ___ towards that wing before the dihedral design can provide the forces needed to bring the wings back to level.
sideslip
How does a fully aft CG effect aircraft stability?
decreased longitudinal stability about the lateral axis
An aircraft has greater longitudinal stability when the C of G is…
well forward of the centre of pressure
How many degrees of bank are required for a rate one turn at a TAS of 200kts?
27°
Formula: TAS/10 +7
Yoru normal stall speed is 95, what’s your stall speed in a 60° baked turn?
134kts
(95 * SQRT of 2)
- 60° = 2G
- 45° = 1.4G
- 30° = 1.15G
Wing tip vortices would be at a MINIMUM for an aircraft flying at __ speed, with a ___ wing span, and in the clean configuration.
high, long
In respect to departing aircraft, vortex generation is most severe at what point?
the point immediately after rotation
What configuration creates the most wake turbulence?
slow, heavy and clean configuration
What’s is the critical engine on a 4 engine pro plane?
eith #1 or #4 outboard engines depending on prop rotation
The speed of sound in the atmosphere is solely dependent on…
air temperature
