Process for manufacturing a variable pitch multi-blade propeller

Details Process for manufacturing a variable pitch multi-blade propeller Process for manufacturing a variable pitch multi-blade propeller

1985-01-04

1987-01-27

Czaja, Donald

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156221, 156245, 156293, 264137, 264152, 264258, 416230, B32B 3120

Patent

active

046392840

ABSTRACT:
A variable pitch multi-blade propeller suitable for use on a helicopter is constructed of a foam preform joined with a fibrous spar enclosed in resin-impregnated foils and fitted with a metal leading edge. Various components are assembled in a mold and the resins, then cured. The structure may further include a reinforcing yoke of carbon fiber fabrics preimpregnated with a polymerizable synthetic resin. The process may further include a heat treating step to effect polymerization.

REFERENCES:
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patent: 3647317 (1972-03-01), Furlong et al.
patent: 3765267 (1973-10-01), Bourquardez et al.
patent: 4091068 (1978-05-01), Karas
patent: 4281966 (1981-08-01), Duret et al.
patent: 4302155 (1981-11-01), Grimes et al.
patent: 4306837 (1981-12-01), Brogdon et al.
patent: 4332525 (1982-06-01), Cheney, Jr.

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