Engine Power Terminology; Airplane Performance And Flight Planning Terminology; Weight And Balance Terminology - Cessna 182Q 1979 Pilot Operating Handbook

CESSNA
MODEL 182Q
ENGINE POWER TERMINOLOGY
SECTION 1
GENERAL
BHP
RPM
Brake Horsepower is the power developed by the engine.
Revolutions Per Minute is engine speed.
MP
Manifold Pressure is a pressure measured in the engine's
induction system and is expressed in inches of mercury
(Hg).
AIRPLANE PERFORMANCE AND FLIGHT PLANNING
TERMINOLOGY
Demon-
strated
Crosswind
Velocity
Usable Fuel
Unusable
Fuel
GPH
NMPG
g
Demonstrated Crosswind Velocity is the velocity of the
crosswind component for which adequate control of the
airplane during takeoff and landing was actually demon-
strated during certification tests. The value shown is not
considered to be limiting.
Usable Fuel is the fuel available for flight planning.
Unusable Fuel is the quantity of fuel that can not be safely
used in flight.
Gallons Per Hour is the amount of fuel (in gallons)
consumed per hour.
Nautical Miles Per Gallon is the distance (in nautical
miles) which can be expected per gallon of fuel consumed
at a specific engine power setting and/ or flight configura-
tion.
g is acceleration due to gravity.
WEIGHT AND BALANCE TERMINOLOGY
Reference
Datum
Station
Arm
Moment
1 October 1978
Reference Datum is an imaginary vertical plane from
which all horizontal distances are measured for balance
purposes.
Station is a location along the airplane fuselage given in
terms of the distance from the reference datum.
Arm isthe horizontal 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
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