MD Helicopters 369E, Rotorcraft Flight Manual

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CSP − E − 1
Optional Equipment
Four − Bladed Tail Rotor
ROTORCRAFT FLIGHT MANUAL
MD 500E
(Model 369E)
Revision 14
9 − 17
FAA Approved
9 − 7. OPERATING INSTRUCTIONS: FOUR − BLADED TAIL ROTOR
PART I
GENERAL
The MDHI Four−Bladed Tail Rotor Kit has been developed to reduce the exter-
nal noise signature of the helicopter. It consists of two principal assemblies, a
four bladed tail rotor, and gearbox. The pedal bungee has been changed to
compensate for tail rotor produced loads.
There is a weight increase of 9.4 pounds which will cause an aft C.G. shift of
0.6 to 0.9 inch depending on gross weight. The exact shift must be determined
by individual helicopter weight and balance.
The four−bladed tail rotor turns at reduced RPM thus substantially reducing
the external noise signature which is a function of rotor tip speed.