EP 0319574 A4 19900905 - VENTURI ENHANCED AIRFOIL
Title (en)
VENTURI ENHANCED AIRFOIL
Publication
Application
Priority
US 6622387 A 19870625
Abstract (en)
[origin: WO8810210A1] A basic airfoil has its operating performance improved by incorporating one or more apertures in the airfoil adjacent its trailing edge. These apertures (24) extend from the upper surface (18) of the airfoil down through to the lower surface (20) of the airfoil. The entry port (25) and the exit port (26) of these apertures (24) has a greater circumference than that of the throat (27) circumference which is intermediate thereto. This structure forms a venturi having a vertical axis. Spaced below the throat (27) of the aperture (24) are a plurality of air nozzles (30) that communicate with an air plenum chamber (32) within the airfoil. A source of pressurized air (35) is connected to the plenum chamber (32). The venturi enhanced airfoil can be utilized both in a horizontal fixed airfoil or its structure can also be incorporated into the tail rudder (53) of an aircraft or helicopter. The venturi enhanced airfoil can be oriented in any position between the horizontal and vertical axes.
IPC 1-7
IPC 8 full level
B63B 1/24 (2006.01); B64C 21/02 (2006.01); B64C 21/04 (2006.01); B64C 23/00 (2006.01)
CPC (source: EP KR US)
B64C 21/04 (2013.01 - EP KR US); B64C 23/00 (2013.01 - EP US); B64C 2230/04 (2013.01 - EP); B64C 2230/16 (2013.01 - EP); B64C 2230/28 (2013.01 - EP); Y02T 50/10 (2013.01 - EP)
Citation (search report)
- NO FURTHER DOCUMENTS HAVE BEEN DISCLOSED
- See references of WO 8810210A1
Designated contracting state (EPC)
AT BE CH DE FR GB LI NL SE
DOCDB simple family (publication)
WO 8810210 A1 19881229; AU 2325988 A 19890119; BR 8807113 A 19891017; EP 0319574 A1 19890614; EP 0319574 A4 19900905; JP H02501213 A 19900426; KR 890701417 A 19891220
DOCDB simple family (application)
US 8802102 W 19880623; AU 2325988 A 19880623; BR 8807113 A 19880623; EP 88907492 A 19880623; JP 50647188 A 19880623; KR 890700365 A 19890227