Blade of composite materials and its manufacturing process

Details Blade of composite materials and its manufacturing process Blade of composite materials and its manufacturing process

1989-06-07

1990-01-09

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416230, 416134A, 416241A, B64C 1100, B64C 2700

Patent

active

048924628

ABSTRACT:
The blade of composite materials and its manufacturing process according to the invention are such that the spar includes at least one bundle (10a, 10b) extending longitudinally in the shell (4), between the fillings of the leading edge (12a) and the trailing edge (12c) and which adheres directly to the laminated pressure face and suction face coverings, (4a, 4b) of the rigid shell (4). Beyond the blade footing (3), the spar is shaped to form a root loop flexible in torsion (8) and passing round an attaching socket (9) on the hub. Application to variable pitch multi-blade propellers for the streamlined tail rotors of helicopters.

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