Composite blade construction for a propeller or rotor blade

Details Composite blade construction for a propeller or rotor blade Composite blade construction for a propeller or rotor blade

1989-08-03

1990-10-30

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

416230, 416271A, F01D 514, F01D 530

Patent

active

049665278

ABSTRACT:
A composite propeller blade construction has fiber strands extending predominantly in a radial direction and looping around mounting hardware connecting a blade root to a rotor hub. The mounting hardware includes at least one bolt secured to the rotor hub or a shackle member secured to the hub by a mounting bolt and holding a tying bolt so that fiber strand loops forming the blade body loop around the shackle member and around free ends of the tying bolt. The radially extending fiber strands take up centrifugal forces and are enclosed by a jacket, the radially inner end of which is formed as mounting flanges screwed to a respective rim of the hub. The arrangement of the fiber loops is especially suitable for a fiber composite lightweight construction wherein the fibers form redundant load take-up paths and provide an advantageous centrifugal force and moment introduction into the structure.

REFERENCES:
patent: 2919889 (1960-01-01), Rubel
patent: 3027138 (1962-03-01), Howell et al.
patent: 3310116 (1967-03-01), Saeki et al.
patent: 3737250 (1973-06-01), Pilpel et al.
patent: 3883267 (1975-05-01), Baudier et al.
patent: 4268571 (1981-05-01), McCarthy
patent: 4417854 (1983-11-01), Cain et al.
patent: 4810167 (1989-03-01), Spoltman et al.
"Composite Propellers, Some Pros and Cons", in the Magazine Entitled Aerospace Engineering, May, 1986.
Aviation Week & Space Technology, Apr. 13, 1987, pp. 52-67 and 90-93, pp. 78-79.

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