TM 1-1520-238-10
6-17
Section VII.
CENTER OF GRAVITY
6.20 CENTER OF GRAVITY.
This section contains information needed to determine
whether the helicopter loading (gross weight and moment
combination) will fall within the helicopter center of gravity
limits.
6.21 CENTER OF GRAVITY LIMITS CHART.
a. The normal forward cg limit is at fuselage station
201.0 inches to 19,400 pounds and a straight taper from
201.0 to 202.2 inches from 19,400 to 21,000 pounds. The
normal aft cg limit is at fuselage station 207.0 inches to
14,660 pounds and a straight taper from 207.0 to 203.3
inches from 14,660 to 21,000 pounds.
b. The normal center of gravity limits chart is shown in
figure 6-3. All flight cg must remain within these limits.
This chart is used in conjunction with Chart F (DD 365F)
as follows:
1. Load the helicopter to takeoff condition and de-
termine takeoff cg (Form F, ref 12 and ref 13).
2. Check cg limits using the chart (fig 6-3). If cg lim-
its are exceeded, then the loading must be re-
vised. Refer to paragraph 6.10 for guidance.
3. After the takeoff cg limits are satisfied, deter-
mine estimated landing weight and cg (Form F,
ref 15 and ref 16).
4. Check cg limits using the chart (fig 6-3). If cg lim-
its are exceeded, the loading must be revised.
Refer to paragraph 6.10 for guidance.
5. When either takeoff or landing cg is close to the
cg limits, further analysis is required to deter-
mine if intermediate flight conditions will exceed
limits. Refer to paragraph 6.10 for guidance.
