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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 is the quantity of fuel that cannot be safely
used in flight.
• Usable Fuel is the fuel available for flight planning.
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.
• Arm is the horizontal distance from the reference datum to
the center of gravity (CG) of an item. The airplane’s arm is
obtained by adding the airplane’s individual moments and
dividing the sum by the total weight.
• Basic Empty Weight is the actual weight of the airplane
including all operating equipment that has a fixed location
in the airplane. The basic empty weight includes the
weight of unusable fuel and full oil.
MAC Mean Aerodynamic Chord is the chord drawn through the
centroid of the wing plan area.
LEMAC Leading Edge of Mean Aerodynamic Chord is the forward
edge of MAC given in inches aft of the reference datum
(fuselage station).
• Maximum Gross Weight is the maximum permissible
weight of the airplane and its contents as listed in the
aircraft specifications.
• Moment is the product of the weight of an item multiplied
by its arm.
• Useful Load is the basic empty weight subtracted from the
maximum weight of the aircraft. It is the maximum
allowable combined weight of pilot, passengers, fuel and
baggage.
March 2010
Cirrus Design Section 1
SR22 General
Information Manual 1-13
• 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).
• Reference Datum is an imaginary vertical plane from
which all horizontal distances are measured for balance
purposes.
• Tare is the weight of all items used to hold or position the
airplane on the scales for weighing. Tare includes blocks,
shims, and chocks. Tare weight must be subtracted from
the associated scale reading.
March 2010
1-14 Information Manual
Section 1 Cirrus Design
General SR22
March 2010
Intentionally Left Blank
Information Manual 2-1
Cirrus Design Section 2
SR22 Limitations
Section 2
Limitations
Table of Contents
Introduction ........................................................................................ 3
Certification Status............................................................................. 3
Airspeed Limitations........................................................................... 4
Airspeed Indicator Markings .............................................................. 5
Powerplant Limitations....................................................................... 6
Engine............................................................................................. 6
Propeller ......................................................................................... 7
Weight Limits ..................................................................................... 7
Engine Instrument Markings & Annunciations ................................... 8
PowerPlant ..................................................................................... 8
Fuel................................................................................................. 9
Electrical ......................................................................................... 9
Center of Gravity Limits ................................................................... 10
Maneuver Limits............................................................................... 11
Flight Load Factor Limits.................................................................. 11
Minimum Flight Crew ....................................................................... 11
Kinds of Operation ........................................................................... 12
Kinds of Operation Equipment List ............................................... 12
Icing .............................................................................................. 16
Runway Surface ........................................................................... 16
Taxi Power.................................................................................... 16
Fuel Limits........................................................................................ 17
　
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