AIRPLANE
FLIGHT
MANUAL
PERFORMANCE
CTA APPROVED
5-01
ORIGINAL
code 01 Page 15
AFM-1912
MAXIMUM CLIMB THRUST
It is the maximum thrust available for use during climb to cruise flight
level, step climb, or for acceleration to cruise speed, with all engines
operating, not time limited.
MAXIMUM CRUISE THRUST
It is the maximum thrust available for cruise with all engines operating,
not time limited.
IDLE THRUST
It is rather a thrust lever position suitable for a minimum thrust
operation. This may be a thrust idle mode for ground operation
(ground idle), a thrust idle mode for normal flight (flight idle), and a
thrust idle mode for landing approach (approach idle).
ENROUTE AND TURN PERFORMANCE
CLIMB OR DESCENT GRADIENT
It is the tangent of the angle of climb or descent flight path, in relation
to the horizontal plane, usually expressed as percentage. Climb
gradients are positive while descent gradients are negative.
DRIFTDOWN
It is the descent flight path following an engine failure, when the
airplane is not able to maintain cruise altitude.
CEILING
It is the maximum altitude at which straight and level flight is possible.
BUFFET
It is the vibration felt by the pilot caused by boundary layer detachment
due to high angles of attack or shock waves.
LOAD FACTOR
It is the ratio between the aerodynamic force component acting normal
to the longitudinal axis of the airplane and the airplane weight. A
positive load factor is one in which the aerodynamic force acts upward
with respect to the airplane.
BANK ANGLE
It is the airplane lateral inclination of the wings, in relation to the
horizontal plane.
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