Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Formed with main spar
Patent
1979-04-03
1982-02-23
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Formed with main spar
416230, 416241A, 416144, B64C 2746
Patent
active
043167004
ABSTRACT:
A helicopter rotor blade having a longitudinal axis and a monolithic spar comprising a longitudinally-extending counterweight, a root member attached to the counterweight, and a retention means retained by and projecting laterally from the root member. A plurality of longitudinally-extending fibers is assembled into a group and is wrapped around the retention member and brought back at least partially upon itself, and then the foregoing elements are bonded together to form a solid spar member. A longitudinally-extending spacer member and the spar member are placed between a top skin section and a bottom skin section, each of which skin sections extends laterally and has a leading edge and a trailing edge. The leading edges abut each other and the trailing edges are bonded to each other. Preferably the trailing portion of this blade is hollow and unsupported internally. A method of making this blade and its component part is also disclosed.
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Mon Donald D.
Powell Jr. Everette A.
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