TM 55-1510-215-10
Torquemeter
The torquemeter system determines the shaft output torque. Torque values are
obtained by tapping into two outlets on the reduction gear case and recording the
differential pressure from the outlets.
B-5. Graph and Tabular Terminology.
AGL
Above ground level.
Best Angle of Climb
The best angle-of-climb speed is the airspeed which delivers the greatest gain of
altitude in the shortest possible horizontal distance with gear and flaps up.
Best Rate of Climb
The best rate-of-climb speed is the airspeed which delivers the greatest gain of
altitude in the shortest possible time with gear and flaps up.
Clean Configuration
Gear and flaps up regardless of mission antenna installation.
Demonstrated
The maximum 90 crosswind component for which adequate control of the
Crosswind
aircraft 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 Fuel
Any weight above the value given must be loaded as fuel.
Weight
MEA
Minimum Enroute Altitude.
Obstacle Clearance
Obstacle clearance climb speed is a speed near Vx and Vy, 1.1 times power
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 takeoff 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.
B-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
Envelope
the limits beyond which loading is not approved.
B-4
