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1. US20080191101 - Aerofoil Surface for Controlling Spin

Office United States of America
Application Number 11909500
Application Date 23.03.2006
Publication Number 20080191101
Publication Date 14.08.2008
Publication Kind A1
IPC
B64C 39/00
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
39Aircraft not otherwise provided for
B64C 39/06
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
39Aircraft not otherwise provided for
06having disc- or ring-shaped wings
B64C 5/00
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
5Stabilising surfaces
B64C 5/12
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
5Stabilising surfaces
10adjustable
12for retraction against or within fuselage or nacelle
B64C 5/18
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
5Stabilising surfaces
10adjustable
18in area
B64C 9/00
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
9Adjustable control surfaces or members, e.g. rudders
Applicants HATTON GEOFFREY
MCINTOSH SIMON
Inventors Hatton Geoffrey
Mcintosh Simon
Agents Fleit Gibbons Gutman Bongini &; Bianco PL
Priority Data 0505959 23.03.2005 GB
Title
(EN) Aerofoil Surface for Controlling Spin
Abstract
(EN)

The invention concerns craft of the type in which a fan directs a jet of fluid (4) over a curved canopy (1). The canopy (1) is shaped to divert the flow from a radial to an axial direction to produce lift. A problem is that rotation of the fan causes unwanted rotation of the canopy (1). The problem is solved using vanes (6) on the canopy (1) that have an adjustable surface area; and by providing a control system to adjust the effective surface area so as to compensate for the tendency of the rotor to rotate the canopy. The vanes (6) can be designed to slide in and out of the canopy (1) to obtain the required adjustment. In a preferred arrangement the vanes are arranged between upstream and downstream ends of the flow at a position where the effects of changes in swirl angle with varying rotor speed at least partially compensate for consequential changes in the tendancy for the canopy to spin.

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