Bifoil blade

Details Bifoil blade Bifoil blade

1980-04-22

1982-07-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416230, B64C 1126

Patent

active

043392300

ABSTRACT:
A bifoil blade structure useful for various aerodynamic blade applications is disclosed wherein internal support is provided by a unidirectional integrally wound fiber composite channel spar comprising at least two unidirectional fiber composite channels extending from the root end to the tip end of the blade. These channels each contain two unidirectional fiber composite bars joined by a fiber composite channel web.

REFERENCES:
patent: 2694458 (1954-11-01), Stevens
patent: 3028292 (1962-04-01), Hinds
patent: 3476484 (1969-11-01), Brunsch
patent: 3586460 (1971-06-01), Toner
patent: 3713753 (1973-01-01), Brunsch
patent: 3962506 (1976-06-01), Dunahoo
patent: 3967996 (1976-07-01), Kamov et al.
patent: 4079903 (1978-03-01), Ashton et al.
patent: 4081220 (1978-03-01), Andrews
patent: 4213739 (1980-07-01), Euler
patent: 4278401 (1981-07-01), Martinelli

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