Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Reverse curve surface
Patent
1986-12-03
1988-10-25
Schwartz, Larry I.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Reverse curve surface
416223R, B63H 126
Patent
active
047800585
ABSTRACT:
A fluid foil for use in a marine propeller having an upper surface with a uniform, continuous convex shape commencing at the leading edge and terminating at the trailing edge of the foil section and a lower foil face having a convex shape extending from the said leading edge to the foil mid/chord position and having a concave shape extending from the said mid-chord position to the said trailing edge. An effective pitch line extending from the foil leading edge to the foil trailing edge is intersected tangentially by the concave shape of the lower foil face.
REFERENCES:
patent: 4073601 (1978-02-01), Kress
patent: 4413796 (1983-11-01), Bousquet
patent: 4608823 (1986-09-01), Maze
Delbridge Robert F.
Fors Arne I.
Marine Systems Research Inc.
Schwartz Larry I.
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