ENSTROM 280FX OPERATOR’S MANUAL
3-7
FAA Approved: Nov 26/13
Rev. 9
Report No. 28-AC-020
Nov 5/13
a. Adjust collective as required to maintain rotor RPM in
green arc and establish 58 MPH autorotative glide.
b. Select landing site.
c. Grip cyclic between knees and with right hand turn
fuel boost pump OFF and pull mixture control to idle
cut off.
d. Rotate throttle to start position (start index up).
e.
Engage
starter.
f. When engine fires, mixture full rich and boost pump
ON.
g. Slowly increase throttle until engine and rotor tach
needles join in green arc.
3. Engine Failure – Altitude above 10 ft and below 375 ft
AGL
If an engine failure occurs at low altitude and low
airspeed, sufficient altitude may not be available to
increase rotor RPM. The collective must be adjusted for
the conditions in order to reach the touchdown point
without excessive rotor droop. The collective reduction
will vary from no reduction at zero airspeed and 10 feet
to full down collective at higher altitudes and airspeeds.
If engine failure occurs, proceed as follows:
a. Adjust collective to maintain rotor RPM, throttle to
idle position and right pedal to trim helicopter.
b. Adjust cyclic for autorotative glide.
NOTE
At higher altitudes and low airspeed use forward
cyclic to increase forward speed to approximately
58 MPH. At low altitudes and higher airspeed aft
cyclic will be required to reduce speed prior to
ground contact.
c. At altitude of approximately 50 ft AGL, use aft cyclic
to reduce forward speed.
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