Helicopter blade tracking system

Details Helicopter blade tracking system Helicopter blade tracking system

1993-08-02

1997-09-23

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

With light attenuation

356 23, 73455, G01B 1100

Patent

active

056710518

ABSTRACT:
A helicopter blade tracking system including an apparatus and method having a self-contained light unit on each blade; each light unit being of similar construction and matched in size and weight. Rings of light formed by the light units during blade rotation are observed by the operator during hover and blade angular position is changed to bring the rings of light into one multi-colored ring of light.

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patent: 4465367 (1984-08-01), Sabatier
patent: 4531408 (1985-07-01), Chadwick et al.

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