Method and apparatus for folding/unfolding the blades of a rotary-wing aircraft rotor
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United States of America Patent
Stats
-
Feb 24, 2004
Grant Date -
Feb 12, 2004
app pub date -
Feb 27, 2003
filing date -
Mar 11, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To fold/unfold blades of a rotor, at least one variable-length linear actuator is removably attached to two blades locked in the flight position. A first blade is unlocked, and the actuator is actuated to vary its length and bear against the other blade which remains locked. This causes the first blade to pivot about its pivot axis and move to a folded position where it is again locked. The other blade is then unlocked and the actuator once again actuated but this time bearing against the first blade. In this way the other blade pivots into the folded position where it is again locked. The two locked folded blades may be connected to each other by a link rod. Rotors with three blades, four blades, five and six blades can be folded/unfolded with only two actuators.
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