Normal Procedures
CSP
−
E
−
1
ROTORCRAFT FLIGHT MANUAL
MD 500E
(Model 369E)
Revision 16
4
−
24
FAA Approved
4
−
9. PRACTICE AUTOROTATION
Perform throttle rigging check prior to attempting practice
autorotations (paragraph 4
4). Misrigging of the throttle control
may result in inadvertent flameout during rapid closing of the
twistgrip to the ground idle position.
Uncoordinated turns/maneuvers may cause fuel starvation with
less than 35 LBS of fuel. Do not practice autorotations if the FUEL
LEVEL LOW caution indicator is ON.
Do not perform intentional full touchdown autorotation with blade
tracking reflectors installed on blade tips.
Make practice autorotation landings as follows:
For autorotation descent, the twistgrip should be in the full open or ground
idle position. However, if a practice autorotation landing (minimum engine
power) is desired, rotate the twistgrip to the ground idle position.
Increase collective pitch after establishing autorotation to prevent rotor
overspeed if flight is at high gross weight or high density altitude. To re-
duce rate of descent or to extend gliding distance, operate at minimum rotor
rpm. Restore ROTOR RPM (N
R
) by lowering collective prior to flareout.
If a power recovery is desired, lower collective to fulldown, rotate the
twistgrip to the full openposition, verify that N
2
is between 102 and 103
percent and that fullengine power is available prior to increasing collective.
Conduct practice autorotation at 130 knots IAS or below (see V
NE
placards).
Maintain rotor between 410 and 523 by use of the collective control.
NOTE
:
Refer to Section II “Power turbine (N
2
) speed avoid range”.
Maximum gliding distance is obtained at 80 knots and 410 rotorrpm.
Minimum rate of descent is obtained at 60 knots and 410 rotor rpm.
NOTE
:
Glide distances attained during an actual engine out autorotation may be less
than the glide distances achieved during practice autorotations when operating
at reduced RPM (N
2
/N
R
needles joined).
Touchdown in a level attitude.
Avoid use of aft cyclic control or rapid lowering of collective pitch during
initial ground contact or during ground slide.
WARNING
CAUTION
