TM 55-1510-220-10
Clean
Gear and flaps up regardless of mission antenna installation.
Configuration
Demonstrated
The maximum 90° crosswind component for which adequate control of the aircraft
Crosswind
during takeoff and landing was actually demonstrated during certification tests.
Gradient
The ratio of the change in height to the horizontal distance, usually expressed
in percent.
Landing Weight
The weight of the aircraft at landing touchdown.
Maximum Zero
Any weight above the value given must be loaded as fuel.
Fuel Weight
MEA
Minimum Enroute Altitude.
Obstacle Clear-
Obstacle clearance climb speed is a speed near Vx and Vy, 1.1 times power
ance Climb Speed
off stall speed, or 1.2 times minimum single-engine stall-speed, whichever is
higher.
Ramp Weight
The gross weight of the aircraft before engine start. Included is the takeoff weight
plus a fuel allowance for start, taxi, run-up and take-off ground roll to lift-off.
Route Segment
A part of a route. Each end of that part is identified by:
a. A geographic location; or
b. A point at which a definite radio fix can be established.
Service Ceiling
The altitude at which the maximum rate of climb of 100 feet per minute can
be attained for existing aircraft weight.
Takeoff Weight
The weight of the aircraft at lift-off from the runway.
6.
WEIGHT AND BALANCE TERMINOLOGY.
Arm
The distance from the center of gravity of an object to a line about which moments
are to be computed.
Approved Loading
Those combinations of aircraft weight and center of gravity which define the
Envelope
limits beyond which loading is not approved.
Basic Empty
The aircraft weight with fixed ballast, unusable fuel, engine oil, engine coolant,
Weight
hydraulic fluid, and in other respects as required by applicable regulatory
standards.
Center-of-Gravity
A point at which the weight of an object may be considered concentrated for
weight and balance purposes.
CG Limits
CG limits are the extremes of movement which the CG can have without making
the aircraft unsafe to fly. The CG of the loaded aircraft must be within these
limits at takeoff, in the air, and on landing.
Datum
A vertical plane perpendicular to the aircraft longitudinal axis from which fore
and aft (usually aft) measurements are made for weight and balance purposes.
Engine Oil
That portion of the engine oil which can be drained from the engine.
Landing Weight
The weight of the aircraft at landing touchdown.
Maximum Weight
The largest weight allowed by design, structural, performance or other limitations.
B4
