Pilot's Operating Handbook
Section 1
General
Edition 1 - January 15, 2018
Rev. 0
Page 1.4.3
SHP
:
Shaft Horsepower.
TRQ
:
Torque.
Airplane performance and flight 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.
C.G. limits
:
Center of Gravity Limits are the extreme center of gravity locations
within which the airplane must be operated at a given weight.
Standard empty weight :
Weight of a standard airplane including unusable fuel and full
operating fluids (oil and hydraulic fluids).
Basic empty weight :
Standard empty weight plus optional equipment.
Useful load :
Is the difference between maximum ramp weight and the basic
empty weight.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
