2-4
ENSTROM 280FX OPERATOR’S MANUAL
FAA Approved: Mar 26/12
Rev. 6
Report No. 28-AC-020
Feb 21/12
c. Aft limit varies linearly from 94.6 inches at 2350 lb to
100.0 inches at 2000 lb. Aft limit at 100.0 inches below
2000 lb.
4. Envelope B is the next heavier envelope. It has a V
NE
of
104 MPH. The c.g. and gross weight limits vary 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 linearly from 96.0 inches at 2450 lb to
99.2 inches at 2240 lb and 100.0 inches at 2000 lb.
d. The lower limit corresponds to the upper and aft limits
of Envelope A.
5. Envelope C has a V
NE
at sea level of 91 MPH. The c.g. and
gross weight limits vary as follows:
a. Upper weight limit is 2550 lb.
b. Forward limit varies linearly from 95.5 inches at 2550
lb to 93.8 inches at 2450 lb.
c. Aft limit varies linearly from 97.3 inches at 2550 lb to
98.4 inches at 2470 lb and then to 99.2 inches at 2240
lb.
d. The lower limit corresponds to the upper and aft limits
of Envelope B.
6. Envelope D is the heaviest envelope. It has a V
NE
at sea
level of 85 MPH. The c.g. and gross weight limits vary as
follows:
a. Upper weight limit is 2600 lb.
b. Forward limit varies linearly from 96.3 inches at 2600
lb to 95.5 inches at 2550 lb.
c. Aft limit varies linearly from 98.0 inches at 2600 lb to
98.4 inches at 2470 lb.
d. The lower limit corresponds to the upper and aft limits
of Envelope C.
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