1-12
P/N 13772-005
Section 1
Cirrus Design
General
SR22T
Performance and Flight Planning Terminology
Weight and Balance Terminology
g
One “g” is a quantity of acceleration equal to that of
earth’s gravity.
Demonstrated
Crosswind
Velocity
Demonstrated Crosswind Velocity is the velocity of
the crosswind component for which adequate
control of the airplane during taxi, takeoff, and
landing was actually demonstrated during
certification testing. Demonstrated crosswind is not
considered to be limiting.
Service
Ceiling
Service Ceiling is the maximum altitude at which the
aircraft at maximum weight has the capability of
climbing at a rate of 100 feet per minute.
GPH
Gallons Per Hour is the amount of fuel (in gallons)
consumed by the aircraft per hour.
NMPG
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 configuration.
Unusable Fuel Unusable Fuel is the quantity of fuel that cannot be
safely used in flight.
Usable Fuel
Usable Fuel is the fuel available for flight planning.
Reference
Datum
Reference Datum is an imaginary vertical plane
from which all horizontal distances are measured for
balance purposes.
Station
Station is a location along the airplane fuselage
measured in inches from the reference datum and
expressed as a number. For example: A point 123
inches aft of the reference datum is Fuselage
Station 123.0 (FS 123).
CG
Center of Gravity is the point at which an airplane
would balance if suspended. Its distance from the
reference datum is found by dividing the total
moment by the total weight of the airplane.
Original Issue
