Air foil blade and methods of making same

Details Air foil blade and methods of making same Air foil blade and methods of making same

1994-01-12

1995-04-04

Loook, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416230, 416241A, 2988971, 264 467, F01D 514, B29C 4514

Patent

active

054031613

ABSTRACT:
For use in rear turbine stabilized helicopters, a air foil blade comprising an integrally formed and readily replicated spar and blade in which the blade is created from compounded plastic having cellular structure and adherent to the spar. The air foil blade is produced by a unique adaptation of an injection molding process using a foamed polypropylene thermoplastic material.

REFERENCES:
patent: 2423700 (1947-07-01), Hardy
patent: 3305196 (1967-02-01), Hanlon
patent: 4477228 (1984-10-01), Duffy et al.
patent: 5076760 (1991-12-01), Westman et l.

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