Method of folding the blades of a main rotor of a rotary-wing ai

Details Method of folding the blades of a main rotor of a rotary-wing ai Method of folding the blades of a main rotor of a rotary-wing ai

1997-10-20

2000-04-11

Eldred, J. Woodrow

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 39, 244 1711, 244 6, 416142, B64C 356

Patent

active

060479248

ABSTRACT:
Once the rotor of a rotary-wing aircraft is held stationary in an indicated position, the method comprises steps consisting in placing the collective pitch control stick in a first predefined position corresponding to a first inclination of the blades about their longitudinal axes, in placing the cyclic pitch control stick in a second predefined position corresponding to a nose-up position of the rotary-wing aircraft, in modifying the length of the control system to cause the inclination of the blades about their longitudinal axes to go to a second value that is different from said first inclination value, in holding a rotary swashplate stationary by placing at least three locking connection rods between the rotary swashplate and a member integral in terms of rotation with a rotor mast, and in folding the blades by rotating each of them about a corresponding coupling pin for coupling it to a coupling member for coupling the blade to a rotor hub.

REFERENCES:
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patent: 5322415 (1994-06-01), White et al.
patent: 5782606 (1998-07-01), Mondet et al.
EH101 Helicopter Folding System, Sep. 14-16, 1993, Nineteenth European Rotorcraft Forum.

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