ENSTROM 280FX OPERATOR’S MANUAL
6-3
Rev.
11
Report No. 28-AC-020
Sep 20/17
SECTION 6. WEIGHT/BALANCE AND LOADING
6-1. General
This helicopter must be flown within the weight and center
of gravity limits stated in Section 2, “Operating Limitations”.
The helicopter empty weight, empty weight c.g., total basic
weight and basic weight c.g. are found in the Weight and C.G.
Calculation form (Figure 6-8). Removal or installation of
optional equipment will change the helicopter weight and c.g.
These changes shall be recorded on the Weight and Balance
form (Figure 6-7) to maintain a running basic total weight,
arm, and moment. The pilot will use this running basic total
when performing calculations to ensure the helicopter is
loaded properly.
6-2. Approved Center of Gravity Envelopes
1. Longitudinal C.G.
a. Station zero is located 100.0 inches forward of
centerline of main rotor hub.
b. Longitudinal c.g. range variable with gross weight from
92.0 inches to 100.0 inches (reference Figure 6-1).
2. Lateral Offset Moment
a. Centerline of helicopter is 0 inch lateral moment arm.
Looking forward, moment arms left of centerline are
negative.
b. Lateral c.g. locations:
Two people on board:
(1) Left seat (pilot)
-13.5
(2) Right seat (co-pilot)
+13.5
Three people on board:
(1) Left seat (pilot)
-13.5
(2) Center passenger
+3.0
(3) Right passenger
+20.5
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