Inplane nodalization system

Details Inplane nodalization system Inplane nodalization system

B - Operations, Transporting

64

C

244/15

B64C 27/58 (2006.01) B64C 27/00 (2006.01)

Patent

CA 1142155

ABSTRACT OF THE DISCLOSURE A helicopter transmission mounting structure is disclosed in which at least three decoupled inertial isolators (26,38,30,32) are connected to the transmission (12) to support the helicopter fuselage. Each of the inertial isolators (26,28,30,32) is mounted in the nodal plane of the transmission (12) to absorb inplane vibra- tions generated by a rotor blade and transmitted through a rotor mast (10). The inertial isolators (26,28,30,32) respond individually to applied vibrations which have predetermined frequencies and generate counteracting forces to reduce the amplitude of vibrations transmitted to the fuselage. In an alternative embodiment beam input links (134,136,138,140) are connected from the nodal plane of the transmission to inertial isolators (142,144,146,148). The beam input links (134,136,138,140) are connected to transmit only those forces parallel to the rotor mast (10).

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