Method for modifying engine loading through changing of...

Details Method for modifying engine loading through changing of... Method for modifying engine loading through changing of...

2005-01-04

2005-01-04

Wright, Andrew (Department: 3617)

Marine propulsion

Screw propeller

C440S050000, C416S22300B, C029S889600

Reexamination Certificate

active

06837760

ABSTRACT:
The present invention is directed to a method of altering the pitch of a propeller through localized bending of its blades. To alter the propeller's pitch the camber of at least one of its blades is changed by bending a portion of a trailing edge, a leading edge, or both edges relative to a remainder of the blade. A bent portion can be located away from a tip of the blade at a distance that is less than or substantially equal to 60% of a radius of the blade, and bending preferably commences at a distance in from an edge of a blade of up to 50% of a section width of the blade. The maximum preferable change in pitch at any location on the radius due to bending is 30%.

REFERENCES:
patent: 2013705 (1935-09-01), Warren
patent: 3032092 (1962-05-01), Erlbacher
patent: 3704500 (1972-12-01), Okamoto
patent: 4143536 (1979-03-01), Okamoto et al.
patent: 4161056 (1979-07-01), Dunham
patent: 4222259 (1980-09-01), Junes
patent: 5315856 (1994-05-01), Mackey
patent: 5377521 (1995-01-01), Mackey

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