Demonstrated
crosswind
velocity
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
The force of gravity or acceleration.
Usable fuel
Total fuel that can be effectively consumed by the engine.
D
50
Takeoff or landing distance over a 50-foot (15-meter) obstacle
Weight and Balance Terminology
Reference
datum
Datum perpendicular to the longitudinal airplane centerline from
which all distances are measured for weight and balance
purposes.
Arm
The distance from the reference datum to the center of gravity
(C.G.) of an item.
Moment
The product of the weight of an item multiplied by its arm.
Center of
gravity
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
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
The difference between maximum ramp weight and the basic
empty weight.
Maximum
Ramp Weight
The maximum weight approved for ground maneuver. It includes
the weight of start, taxi and run up fuel.
Maximum
Takeoff Weight
The maximum weight approved at the beginning of the takeoff
run.
Maximum
Landing
Weight
The maximum weight approved for landing touchdown.
General Abbreviations
A
Ampere
A/C
Air Conditioning
ADC
Air Data Computer
Section 1
General
Pilot's Information Manual
PIM TBM 960 - Edition 0
Rev. 00
Page 1.4.3
PIM - DO NOT USE FOR FLIGHT OPERATIONS
