C
IRRUS
D
ESIGN
S
ECTION
6: W
EIGHT
AND
B
ALANCE
SR20
I
NTRODUCTION
P/N 11934-005
6-3
Introduction
This section describes the procedure for calculating the weight and
moment for various operations. 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 be found at the back of this section.
It is the responsibility of the pilot to ensure that the airplane is loaded prop-
erly and that all changes to the basic empty weight and center of gravity are
recorded.
Figure 6-1:
Airplane Weighing
Basic empty weight, moment, and center of gravity are provided in inches
aft of datum, where 0 inches datum is 100.0 inches forward of the cabin fire-
wall. CG can also be expressed in terms of its location as a percentage of the
airplane Mean Aerodynamic Cord (MAC) using the following formula:
CG% MAC = 100 x (CG Inches – LEMAC) / MAC
Where:
LEMAC = 133.1
MAC = 47.7
• N
OTE
•
Refer to AMM Chapter 8: Leveling & Weighing for instructions.
Weight and Balance Record
Weight and Balance Data
Refer to “As-Delivered” Weight and Balance Data.
SR20_FM06_5337
x
WL 100.0
y
A
B
FS 100.0
FS 142.5
REF DATUM
FS 0.0
Reissue A