Definitions Flashcards
(25 cards)
Critical speed
The speed, beneath which, after engine failure, control of the aircraft is lost- no rudder controllability
Vyse
Single engine best rate of climb speed- blue line
Basic weight
The weight of the aircraft structure including engines, unusable fuel and oil
Service ceiling
The maximum altitude where the aircraft can maintain a climb rate of 50ft per minute
Vmca
The minimum control speed relating to sudden engine failure - at takeoff configuration. A certification, theoretical speed.
Absolute ceiling
The maximum altitude whereby rate of climb falls to zero at full power conditions
TORA
The length of the runway available for the ground run of an aircraft at takeoff
Counter rotating propellers
Propellers which rotate in opposite directions to each other
Be76
Contra-rotating propellers
Problems which rotate in same direction as each other
ASDA
Accelerate Stop Distance Available
The length of the take off run available plus the stopway (if available) if takeoff is aborted and aircraft brought to a stop
Take off Safety Speed Vtoss
Nominal speed to give a safety margin between minimum control speed and stall speed.
Greater of 1.1 x Vmca and 1.2 x stalling speed
The speed above which the aircraft is safely controllable
Vso
The stall speed in landing configuration
Vs1
Stall speed in clean configuration
Vfe
Maximum flap extension speed
Vlo
Maximum landing gear operating speed
Vle
Maximum gear extension speed
Vsse
Single engine safety speed above stall speed and minimum control speed - provide a greater margin of safety for deliberate asymmetric operations and training
Red line speed
Signifies Vmca and Vne
Critical engine
The engine which creates the largest yawing moment when failed in any given set of conditions
Asymmetric blade effect
At reduced power and resulting high angle of attack, the downgoing blade produces more thrust than the upgoing one creating an offset thrust line.
Vxse
The single engine speed for best angle of climb
Define ‘drift down’
Is the maximum thrust/ minimum rate of descent necessitated by engine failure in a multi engine aeroplane in climb or cruise whereby the aircraft cannot maintain current altitude and maintain terrain clearance
What is zero thrust setting?
To simulate feathered prop- typically 13” MAP with aircraft to stay in selected trims
ICAO wake turbulence minima - light twin engine aircraft
Light twin following a heavy aircraft- 6NM / 3 mins
