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Loading Instructions......................................................................6-12
Center of Gravity Limits ................................................................6-14
Weight & Balance Loading Form ..................................................6-15
Loading Data.................................................................................6-16
Moment Limits...............................................................................6-17
Equipment List ..............................................................................6-18
March 2010
6-2 Information Manual
Section 6 Cirrus Design
Weight and Balance SR20
Intentionally Left Blank
March 2010
Information Manual 6-3
Cirrus Design Section 6
SR20 Weight & Balance
Introduction
This section describes the procedure for establishing the basic empty
weight and moment of the airplane. Sample forms are provided for
reference. Procedures for calculating the weight and moment for
various operations are also provided. A comprehensive list of all
equipment available for this airplane is included at the back of this
section.
It should be noted that specific information regarding the weight, arm,
moment, and installed equipment for this airplane as delivered from
the factory can only be found in the plastic envelope carried in the
back of this handbook.
It is the responsibility of the pilot to ensure that the airplane is loaded
properly.
March 2010
6-4 Information Manual
Section 6 Cirrus Design
Weight & Balance SR20
Figure 6-1
FS
350.2"
BUTTOCK LINE (BL)
200
150
100
50
BL 0.0
50
100
150
200
SR20_FM06_1031A
LBL 210.9"
RBL 87.7"
Typical LBL
MAC 48.4"
RBL 66.3"
LBL 66.3"
LBL 77.3"
BL 0.0"
RBL 77.3"
RBL 210.9"
LEMAC
FS 132.9"
STATION
FUSELAGE
(FS)
WL
165.5"
FS
157.5"
220
350
300
250
200
150
100
0.0
50
50
WL100
150
WATER LINE (WL)
FS
38.3"
Reference Datum located at
fuselage station 0.0".
NOTE
FS
55.6"
FS
222.0"
FS
100.0"
Airplane Dimensional Data
March 2010
Information Manual 6-5
Cirrus Design Section 6
SR20 Weight & Balance
SR20_FM06_1021A
Spirit Level
LONGITUDINAL LEVELING
LATERAL LEVELING
Spirit Level
Straight
Edge
Door Sill Door Sill
Spacer
Block
Straight Edge Straight Edge
Spacer
Block
Figure 6-2
Airplane Leveling
March 2010
6-6 Information Manual
Section 6 Cirrus Design
Weight & Balance SR20
Figure 6-3
Airplane Weighing Form
Weighing
Point
Scale
Reading - Tare = Net Weight X Arm = Moment
L Main A=
R Main A=
Nose B=
Total
As Weighed
CG=
CG = Total Moment / Total Weight
Space below provided for additions or subtractions to as weighed condition
Empty Weight CG=
Engine Oil (if oil drained)
15 lb at FS 78.4, moment = 1176
Unusable Fuel 26.4 153.95 4064
Basic Empty Weight CG=
SR20_FM06_1441
x
WL 100.0
y
A
B
FS 100.0 FS 145.0
A = x + 100
B = A - y
y = ____________ Measured
x = ____________ Measured
REF DATUM
FS 0.0
Airplane Weighing Form
March 2010
Information Manual 6-7
Cirrus Design Section 6
SR20 Weight & Balance
Airplane Weighing Procedures
A basic empty weight and center of gravity were established for this
airplane when the airplane was weighed just prior to initial delivery.
However, major modifications, loss of records, addition or relocation of
equipment, accomplishment of service bulletins, and weight gain over
time may require re-weighing to keep the basic empty weight and
center of gravity current. The frequency of weighing is determined by
the operator. All changes to the basic empty weight and center of
gravity are the responsibility of the operator. Refer to Section 8 for
specific servicing procedures.
1. Preparation:
a. Inflate tires to recommended operating pressures.
b. Service brake reservoir.
c. Drain fuel system.
d. Service engine oil.
e. Move crew seats to the most forward position.
f. Raise flaps to the fully retracted position.
g. Place all control surfaces in neutral position.
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