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PRODUCT DATA
JANUARY 2003
MAIN ROTOR SYSTEM
The main rotor is a four-bladed, semi-rigid, bearingless rotor system. This simplicity
of design reduces maintenance by eliminating mechanical hinges, and eliminating
lubrication requirements. The main rotor assembly includes two composite yoke
flexures and damper assemblies along with four composite blade assemblies. The
two yokes stack on top of each other and are indexed to each other by means of a
dowel pin in the mast flange and the mast drive adapter. Four upper damper stops and
four lower damper stops limit the flapping of the rotor system. Pitch horns are attached
to adapters which also mount the fluid filled lead and lag dampers, and are attached
to the main rotor blades by four bolts. The main rotor carries centrifugal and bending
loads (flapping and lead/lag) through the sets of composite yokes. They are designed
as flexures to reduce loads and vibrations. Each yoke flexure will independently allow
flapping, with flapping stops on the upper surface to limit upward movement, and on
the lower surface to limit downward movement. A nickel plated leading edge wear
strip is cold bonded on the stainless steel leading edge of each main rotor blade,
and is easily replaced by an approved support facility in the event that it becomes damaged
or worn.
Содержание BELL 430
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