Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Laminated – embedded member or encased material
Patent
1981-11-16
1983-10-04
Hornsby, Harvey C.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Laminated, embedded member or encased material
416241A, 416248, B64C 1126
Patent
active
044076355
ABSTRACT:
An adjustable pitch aircraft propeller has peripherally spaced composite blades each including an elongated core of expanded rigid foam material extending from a metal base member having a reduced neck portion and an outwardly projecting flange portion. A casing or skin of plastic resin impregnated fabric material surrounds the core of each blade and extends inwardly along the neck portion and also has a flange portion overlying the flange portion of the base member. The skin material overlying the neck portion of the base member is retained by a filament winding impregnated with plastic resin, and the blade is coupled to the propeller hub by an annular lip portion which projects inwardly and overlies the flange portion of the skin material. The foam core of each propeller blade has longitudinally extending slots, and strips of resin impregnated fabric material extend through the slots to form corresponding webs which connect the skin material forming opposite side of the propeller blade.
REFERENCES:
patent: 2182812 (1939-12-01), Lougheed
patent: 2248590 (1941-07-01), Smith
patent: 3237697 (1966-03-01), Ford et al.
patent: 3303889 (1967-02-01), Bates
patent: 3664764 (1972-05-01), Davies et al.
patent: 4302155 (1981-11-01), Grimes et al.
Grimes Richard V.
Harlamert W. Benjamin
Thompson David F.
Hornsby Harvey C.
Peterson Christine A.
TRW Inc.
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