US1793702A - Aeroplane supporting surface - Google Patents

Aeroplane supporting surface Download PDF

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Publication number
US1793702A
US1793702A US418831A US41883130A US1793702A US 1793702 A US1793702 A US 1793702A US 418831 A US418831 A US 418831A US 41883130 A US41883130 A US 41883130A US 1793702 A US1793702 A US 1793702A
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Prior art keywords
supporting surface
flap
aeroplane
gaps
gap
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US418831A
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Ksoll Joseph
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C9/00—Adjustable control surfaces or members, e.g. rudders
    • B64C9/14—Adjustable control surfaces or members, e.g. rudders forming slots
    • B64C2009/143—Adjustable control surfaces or members, e.g. rudders forming slots comprising independently adjustable elements for closing or opening the slot between the main wing and leading or trailing edge flaps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/06—Boundary layer controls by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/20—Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction

Definitions

  • Patent application Serial No. 337,422 dated February 4, 1929 describes an aeroplane carrying surface with transversely directed nozzle-shapecl gaps extending inclined towards the rear from the underside towards the upper side and unite above the head of the real supporting surface in a common outlet gap.
  • This supporting surface is remarkable for the fact that with a small angle of adjustment the values (if the raising force and resistance are approximately similar to the corresponding values of an ordinary supporting surface.
  • This invention relates to an arrangement
  • ami it consists in that a device similar to a Venetan-blind covering the inlet opening of the nozzle-shapecl gap and '211- rfin ed on the under side of the supporting sur ace is used for closing each of the nozzlesha ped gaps.
  • Venetian blind surface is provided, instead of the usual single flap on plane, and composed of a plurality of small flaps or planes, movable within the ordinary plana section.
  • a, I) ami e are the parts of the supporting surface, separated by nozzle-shaped gaps cl 50 ami 6, the pari: a, known as the flap, being 418,831, and in- Germany Janua ry 7, 1929.
  • Venetian blind surfaces l are provided as gap closures, by means of which the ends of the nozzle-shaped gaps al end e.
  • Venetian blind surfaces are preferably connected with the flap c by a lever mechanism, net shown, so that on the lowering of the flap the Venetian blind surfaces suddenly open, thereby very considerably increasng the lifting force and that they again close when the flap is being moved into the horizontal position, whereby the lifting force is reduced again to that of an ordinary supporting surface.
  • the Venetian blind surfaces also present the advantage, that the air ecldy current occurring on the lower side of the supporting surface cannot enter as a whole into the nozzle-shaped "gaps, but is divided into sub-eddies and thereby weakened.
  • A11 aeroplane supporting surface comprising in c ombination a real flap, a main suppprting surface having transverse nozzleshapecl gaps leadng to in front of and behind the centre of the supporting surface from the under side inclined towarcls the real to the upper sile and uniting above the head of the rear flap in a common further narrowed outlet gap, and a Venetian blind sul fece composed of movable small flaps a1- ranged within the section of the supporting surface adapted to close the inlet ends of said gaps.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Blinds (AREA)

Description

Feb. 24, 1931. J Ks 1,-793,702
AEROPLANE SUPPORTING SURFACE Filed Jan. 6, 1950 Patent Feb. 24, 1931 PATENI OFFICE J'OSEIPE KSOLL, Oli IBRESLA'J', GERMAN'Y AEROIPLAN'E SUPPORTIIN'G SURFACE Application filed Ianuary 6, 1930, Serial No.
Patent application Serial No. 337,422 dated February 4, 1929, describes an aeroplane carrying surface with transversely directed nozzle-shapecl gaps extending inclined towards the rear from the underside towards the upper side and unite above the head of the real supporting surface in a common outlet gap. This supporting surface is remarkable for the fact that with a small angle of adjustment the values (if the raising force and resistance are approximately similar to the corresponding values of an ordinary supporting surface.
This invention relates to an arrangement,
enabling the closing of the gaps, in order to transfonn the supporting surface into an ordinary plane, ami it consists in that a device similar to a Venetan-blind covering the inlet opening of the nozzle-shapecl gap and '211- rfin ed on the under side of the supporting sur ace is used for closing each of the nozzlesha ped gaps.
he employment of a single flap or single plane is known for closing the opening of a nozzle-shaped jgap, the dimensione of such flaps corresponding in'the longitudinal direction of the supporting surface With those of the gap inlet. These known closing devices are however, if they move within the section of the supporting plane, difiicult te operate by band, as the pressure, acting on the flap or surfaee which h as to be overcome ,When m-oving the flap into the closin g position, is
very great, whereas, if the fiap or plane lies in the open position entirely or partly outside the ordlnary plane section, the air flow on the lower sicle of the aeroplane supporting surfaee and therefore the efi'ect of the nozzleshaped gap is considerably affected.
Consequently, according to the invention, a
Venetian blind surface is provided, instead of the usual single flap on plane, and composed of a plurality of small flaps or planes, movable within the ordinary plana section.
, An embodiment of the invention s illustrated by way of example in the only figure of the accompanying drawing in which:
a, I) ami e are the parts of the supporting surface, separated by nozzle-shaped gaps cl 50 ami 6, the pari: a, known as the flap, being 418,831, and in- Germany Janua ry 7, 1929.
flap c by means of a link la so that, al: horizontal flight (travelling flight) the gap mouth 71 is more 01 less closed and on lowering the flap the gap mouth is widened.
On the under side of the aroplane sup porting surface Venetian blind surfaces l are provided as gap closures, by means of which the ends of the nozzle-shaped gaps al end e.
can be covered. These Venetian blind surfaces are preferably connected with the flap c by a lever mechanism, net shown, so that on the lowering of the flap the Venetian blind surfaces suddenly open, thereby very considerably increasng the lifting force and that they again close when the flap is being moved into the horizontal position, whereby the lifting force is reduced again to that of an ordinary supporting surface. The Venetian blind surfaces also present the advantage, that the air ecldy current occurring on the lower side of the supporting surface cannot enter as a whole into the nozzle-shaped "gaps, but is divided into sub-eddies and thereby weakened.
I claim:
- A11 aeroplane supporting surface, comprising in c ombination a real flap, a main suppprting surface having transverse nozzleshapecl gaps leadng to in front of and behind the centre of the supporting surface from the under side inclined towarcls the real to the upper sile and uniting above the head of the rear flap in a common further narrowed outlet gap, and a Venetian blind sul fece composed of movable small flaps a1- ranged within the section of the supporting surface adapted to close the inlet ends of said gaps.
In testimony whereof I aflix my signature.
J OSEPH KSOLL.
US418831A 1929-01-07 1930-01-06 Aeroplane supporting surface Expired - Lifetime US1793702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1793702X 1929-01-07

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US1793702A true US1793702A (en) 1931-02-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456906A (en) * 1938-12-19 1948-12-21 Bechereau Louis Supporting surfaces for aircraft
US2562227A (en) * 1947-07-09 1951-07-31 Zobel Theodor Wilhelm Flow profile for reduced drag
US20050151016A1 (en) * 2003-03-27 2005-07-14 Juergen Kelnhofer Air discharge valve for an aircraft
US7222819B1 (en) * 2003-08-02 2007-05-29 Airbus Deutschland Gmbh Aircraft ram air inlet with multi-member closure flap

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456906A (en) * 1938-12-19 1948-12-21 Bechereau Louis Supporting surfaces for aircraft
US2562227A (en) * 1947-07-09 1951-07-31 Zobel Theodor Wilhelm Flow profile for reduced drag
US20050151016A1 (en) * 2003-03-27 2005-07-14 Juergen Kelnhofer Air discharge valve for an aircraft
US7185853B2 (en) * 2003-03-27 2007-03-06 Airbus Deutschland Gmbh Air discharge valve for an aircraft
US7222819B1 (en) * 2003-08-02 2007-05-29 Airbus Deutschland Gmbh Aircraft ram air inlet with multi-member closure flap
US20070120009A1 (en) * 2003-08-02 2007-05-31 Juergen Kelnhofer Aircraft ram air inlet with multi-member closure flap

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