PROPELLER - OBSCHESTVO S OGRANICHENNOI OTV

Title:

PROPELLER

Document Type and Number:

WIPO Patent Application WO/2005/068292

Kind Code:

A1

Abstract:

The inventive propeller consists of a shaft (1) comprising at least two hubs (2) which are mounted thereon and provided with blades (3) fixed to each of them. Each blade (3) has a front and rear sharp edges and is embodied in such a way that the greater airfoil thickness thereof is equal to (0.10-0.25)b along the blade (3) span, wherein b is the mean chord of the blade (3). The greatest airfoil thickness (6) of each blade (3) is located in the middle of each mean chord and is twisted around an axis (8) passing through the middles of the mean chords along the blade (3) span. The blades (3) can be fixed to each hub (2) at an angle of <90° with respect to the radius thereof, thereby reducing a local aerodynamic drag and aerodynamic loads. The inventive propeller can be provided with a fixed cylindrical enclosure which embraces all blades (3) and extended in front of the blades of the front hub (2) at a distance which is equal to or greater than the blade span, thereby increasing a torque effect value.

Inventors:

AKARO ANDREY IGOREVICH (RU)
ZELINSKY ANATOLY MIKHAILOVICH (RU)
MEDVEDEV MIKHAIL MIKHAILOVICH (RU)

Application Number:

PCT/RU2005/000004

Publication Date:

July 28, 2005

Filing Date:

January 11, 2005

Export Citation:

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Assignee:

OBSCHESTVO S OGRANICHENNOI OTV (RU)
AKARO ANDREY IGOREVICH (RU)
ZELINSKY ANATOLY MIKHAILOVICH (RU)
MEDVEDEV MIKHAIL MIKHAILOVICH (RU)

International Classes:

B64C11/00; B64C11/18; B64C11/48; (IPC1-7): B64C11/48; B64C11/18

Foreign References:

GB2239905A	1991-07-17
RU2015062C1	1994-06-30
SU1741608A3	1992-06-15
US2953320A	1960-09-20
RU2062246C1	1996-06-20

Other References: