TBM
PILOT’S OPERATING HANDBOOK 700
SECTION 1
GENERAL
Page 1.4.4
Rev. 2
AIRPLANE PERFORMANCE AND F LIGHT PLANNING TERMINOLOGY
Climb gradient :
Is the ratio of the change in height during a portion of climb, to
the horizontal distance traversed in the same time interval.
Demonstrated crosswind velocity :
Is the velocity of the crosswind component for which
adequate control of the airplane during takeoff and landing
was actually demonstrated during certification tests. The
value shown is not considered to be limiting.
g:Is acceleration due to gravity.
Usable fuel : Total fuel which can be effectively consumed by the engine.
WEIGHT AND BALANCE TERMINOLOGY
Reference datum :
Datum perpendicular to the longitudinal airplane centerline
from which all distances are measured for balance purpose.
Arm : Is the distance from the reference datum to the center of
gravity (C.G.) of an item.
Moment : Is the product of the weight of an item multiplied by its arm.
Center of gravity (C.G.) :
Airplane balance point. Its distance from the reference datum
is found by dividing the total moment by the total weight of the
airplane.
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