ENSTROM 280FX - General; Weight and Balance; Center of Gravity Limits

10-2-16 ENSTROM 280FX OPERATOR’S MANUAL
FAA Approved: Mar 26/12 Rev. 6
Report No. 28-AC-020 Feb 21/12
SECTION VI. WEIGHT AND BALANCE
10-2-16. General
A new weight and balance should be calculated per the
instructions in Section 6 of the Basic Rotorcraft Flight
Manual using the following information:
Table 10-2-1. Weight and Balance Information
ITEM
WEIGHT
(lb)
ARM
(in)
MOMENT
(in-lb)
Float landing gear 75.0 107 8025
Wheel and bracket
removal
-15.0 104.7 -1703
10-2-17. Center of Gravity Limits
1. There are three gross weight/c.g. envelopes for this
helicopter with floats installed. Refer to Figure 10-2-3.
Each envelope corresponds to one of three V
NE
/altitude
envelopes as described in Paragraph 10-2-4 of this
supplement. Refer also Figure 10-2-1.
2. Envelope A is the lightest weight envelope with limits as
follows:
a. Upper weight limit is 2350 lb.
b. Forward limit at 92.0 inches.
c. Aft limit varies linearly from 94.6 inches at 2350 lb to
98.5 inches at and below 2070 lb.
3. Envelope B is the next heavier envelope with limits as
follows:
a. Upper weight limit is 2450 lb.
b. Forward limit varies linearly from 93.8 inches at 2450
lb to 92.0 inches at 2350 lb.
c. Aft limit varies from 96.0 inches at 2450 lb to 98.3
inches at 2280 lb and 98.5 inches at 2070 lb.
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