Lightweight propulsor blade with internal spars and rigid base m

Details Lightweight propulsor blade with internal spars and rigid base m Lightweight propulsor blade with internal spars and rigid base m

1991-02-13

1992-07-14

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Formed with main spar

416217, 416219R, 416229A, 416241R, 416241A, B64C 2746

Patent

active

051297876

ABSTRACT:
A lightweight propulsor blade (10) is constructed 10 of a hollow internal spar (30) and an exterior airfoil shell (20) which defines and encompasses a hollow interior cavity (26). The internal spar (30) is disposed within the cavity 26 and extends spanwisely from its tip portion to terminate in a spar root portion (40). The spar has at least forward and aft spanwisely extending, chordwisely spaced, hollow box-like cavities (52A, 52B), a leading edge shear web (53) projecting chordwisely forward from the forward cavity (52A), a trailing edge shear web (55) projecting chordwisely rearward from the aft cavity (52B), and an intermediate chordwise shear web (57) spanning the space between and interconnecting the forward and aft cavities (52A, 52B). An additional intermediate box-like cavity (52C) may be incorporated in the intermediate chordwise shear web (57) in spaced relationship between the forward and aft cavities (52A, 52B).

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patent: 4810167 (1989-03-01), Spoltman et al.
patent: 5017092 (1991-05-01), Violette et al.
patent: 5022824 (1991-06-01), Violette et al.

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