Cirrus SR20 Pilot Operating Handbook page 177

Cirrus Design
SR20
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
properly. All changes to the basic empty weight and center of gravity
are the responsibility of the operator.
REF DATUM
FS 0.0
FS 100.0
B
A
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 firewall. 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:
Leveling and Weighing procedures are not described in this
section. Refer to Airplane Maintenance Manual (AMM),
Chapter 8, Leveling and Weighing.
P/N 21399-004 P/N 21399-004
Revision A1
FS 142.5
x
y
LEMAC = 133.1
MAC = 47.7
• Note •
Section 6
Weight and Balance Data
WL 100.0
SR20_FM06_2539B
6-3 6-3