WO1997032779A1 - Two-way slot rudder - Google Patents

Two-way slot rudder Download PDF

Info

Publication number
WO1997032779A1
WO1997032779A1 PCT/SE1997/000385 SE9700385W WO9732779A1 WO 1997032779 A1 WO1997032779 A1 WO 1997032779A1 SE 9700385 W SE9700385 W SE 9700385W WO 9732779 A1 WO9732779 A1 WO 9732779A1
Authority
WO
WIPO (PCT)
Prior art keywords
rudder
door
shaft
rotatable
chord
Prior art date
Application number
PCT/SE1997/000385
Other languages
French (fr)
Inventor
Krister Karling
Hampus Gavel
Anders Haevaker
Original Assignee
Saab Aktiebolag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saab Aktiebolag filed Critical Saab Aktiebolag
Priority to AU19505/97A priority Critical patent/AU1950597A/en
Priority to EP97907520A priority patent/EP0883545A1/en
Publication of WO1997032779A1 publication Critical patent/WO1997032779A1/en

Links

Classifications

    • 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
    • B64C9/16—Adjustable control surfaces or members, e.g. rudders forming slots at the rear of the wing
    • 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

Definitions

  • the present invention relates to a two-way slotted rudder for fluid-dynamic application, in particular aerodynamic application, comprising a carrier element attached to a vehicle or aircraft and having carrier surfaces, in relation to which a rudder element is attached to be rotatable around a first shaft rigidly attached to the vehicle or aircraft.
  • a rudder element attached to be rotatable around a first shaft rigidly attached to the vehicle or aircraft.
  • the object of the present invention is to provide a two-way slotted rudder of the kind mentioned in the beginning which provides a good control function, which has a minimum power consumption and which is relatively simple as to its structure.
  • such a two-way slotted rudder is characterized primarily in that on each side of a first chord plane through the carrier element a first door is arranged, which is a rotatable about a second shaft at the carrier element, the first door being arranged to connect, with its edge facing away from said second shaft, to the surface of the rudder element, when a second chord plane through the rudder element is parallel to the first chord plane or forms an angle a thereto in a direction towards said first door, and that it forms, at said edge, when said angle is formed in a direction away from said first door, a slot together with the rudder element, a second door being arranged to be rotatable about a third shaft and opening a window in the first door, when the angle a is formed in a direction towards said first door, so that a flow path for the fluid is formed from the pressure side of the rudder element to the suction side thereof.
  • the extension of this slot in a plane perpendicular to the first and second chord planes constitutes 0.3% to 3% of a total chord length of the carrier element and the rudder element.
  • the ex ⁇ tension of the slot constitutes then advantageously about 1.5% of said total chord length.
  • the extension of the slot in parallel to the first and second chord planes is not critical but constitutes suitably up to about 80% of the extension of the rudder element (2) in parallel to the these planes.
  • Fig. 1A shows a view of a cross section through a two-way slotted rudder according to the invention
  • Figs. IB - IE show alternative designs of a detail of the object in Fig. 1A.
  • Fig. 2 shows a view of a cross section of a portion of an alternative embodiment of the object of Fig. 1A.
  • a carrier element which has carrier surfaces and is rigidly attached to a vehicle or aircraft, such as a wing or fin, is denoted by 1.
  • a rudder element 2 is attached to be eccentrically rotatable about a first shaft 3, which is rigidly attached to the vehicle or aircraft.
  • a first door is arranged, denoted by 5 and 6.
  • These doors are each arranged to be rotatable about a rotatable second shaft 7 and 8 close to the carrier element.
  • Each second door is arranged to connect, with its edge 9 and 10 respectively, facing away from its second shaft, to the surface of the rudder element, in the case where the second chord plane 11 through the rudder element is located in parallel to the first chord plane 4, the two-way slotted rudder then being arranged in a neutral position, or where it forms an angle thereto in a direction towards said first door. It forms at said edge 9 or 10 together with the rudder element a slot 12, in the case where said angle a is formed in a direction away from said door.
  • a second door denoted by 13 and 14 is arranged to be rotatable about the second shaft 7 and 8 and forms a window 15 and 16 in the first door in the case where the angle a is formed in a direction towards said first door, so that a flow path, denoted by 17, as is apparent from Fig. 2, is formed for the air.
  • the second doors 13 and 14 can also (as is illustrated in the figures) be arranged to be rotatable about separate third shafts 30 - 33, which are located at a distance from the second shaft 8.
  • Fig. IE a variant is shown in which the door 14 is carried by a link 34 that is rotatable about a third shaft 33.
  • Fig. 1 relates to a two-way slotted rudder having an asymmetric carrier element and an asymmetric rudder element.
  • the slot 2 constitutes in the example illustrated about 1.4% of the total chord length of the two-way slotted rudder, which is suitable.
  • the desired function can be obtained in different ways, either in a purely mechanical way, comprising control discs and link systems, or electron ydraulically, or a com ⁇ bination of these two systems.
  • parts of a mechanical control system are schematically indicated.
  • a control disc 18 is attached to be rotatable about a third shaft 19 and controls the rotation of the rudder element 2 through links, not shown.
  • control arms 20 and 21 are attached which are guided by tracks 22 and 23 in the rudder element.
  • Said control disc 18 is provided with two guide tracks 24 and 25, which act on pivotable links 26, 27, 28 and 29 in order to control the movements of the second doors 13 and 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Extensible Doors And Revolving Doors (AREA)

Abstract

A two-way slotted rudder in particular for aircraft is described. It comprises a carrier element (1) which is rigidly attached to the vehicle or aircraft and has carrier surfaces and in relation to which a rudder element (2) is attached to be rotatable about a first shaft (3) rigidly attached to the aircraft. It is in particular characterized in that on each side of a first chord plane (4) passing through the carrier element (1) a first door (5, 6) is arranged to be rotatable about a second shaft (7, 8) to the carrier element. The first door is arranged to connect, with its edge (9, 10) facing away from the second shaft, to the surface of the rudder element, in the case where a second chord plane (11) extending through the rudder element is parallel to the first chord plane (4) or forms an angle α thereto in a direction towards said first door. It forms at said edge (9, 10) a slot (12) together with the rudder element in the case where said angle α is formed in a direction away from said door. In each of the first doors a second door (13, 14) is arranged and is rotatable about a third shaft (7, 8, 30-33) and forms a window (15, 16) in the first door in the case where the angle α is formed in a direction away from said first door, so that a flow path (17) is formed for the fluid from the pressure side of the rudder element to the suction side thereof.

Description

TWO-WAY SLOT RUDDER
The present invention relates to a two-way slotted rudder for fluid-dynamic application, in particular aerodynamic application, comprising a carrier element attached to a vehicle or aircraft and having carrier surfaces, in relation to which a rudder element is attached to be rotatable around a first shaft rigidly attached to the vehicle or aircraft. There are various applications of such controls, in particular within the aerodynamic and hydrodynamic field. For aircraft, it can for example apply to side rudders or ailerons.
Considering the increasing costs of motor fuels one tries to obtain such a con¬ figuration of aircraft and vehicles that said costs will be as low as possible. The de¬ sign of rudder elements has importance thereto. The object of the present invention is to provide a two-way slotted rudder of the kind mentioned in the beginning which provides a good control function, which has a minimum power consumption and which is relatively simple as to its structure.
According to the invention such a two-way slotted rudder is characterized primarily in that on each side of a first chord plane through the carrier element a first door is arranged, which is a rotatable about a second shaft at the carrier element, the first door being arranged to connect, with its edge facing away from said second shaft, to the surface of the rudder element, when a second chord plane through the rudder element is parallel to the first chord plane or forms an angle a thereto in a direction towards said first door, and that it forms, at said edge, when said angle is formed in a direction away from said first door, a slot together with the rudder element, a second door being arranged to be rotatable about a third shaft and opening a window in the first door, when the angle a is formed in a direction towards said first door, so that a flow path for the fluid is formed from the pressure side of the rudder element to the suction side thereof.
In an advantageous embodiment of the two-way slotted rudder the extension of this slot in a plane perpendicular to the first and second chord planes constitutes 0.3% to 3% of a total chord length of the carrier element and the rudder element. The ex¬ tension of the slot constitutes then advantageously about 1.5% of said total chord length.
The extension of the slot in parallel to the first and second chord planes is not critical but constitutes suitably up to about 80% of the extension of the rudder element (2) in parallel to the these planes.
The invention will be described in the following with reference to the accompanying schematic drawings which are related to the use in an aircraft, in which:
Fig. 1A shows a view of a cross section through a two-way slotted rudder according to the invention,
Figs. IB - IE show alternative designs of a detail of the object in Fig. 1A, and
Fig. 2 shows a view of a cross section of a portion of an alternative embodiment of the object of Fig. 1A.
In the figures a carrier element, which has carrier surfaces and is rigidly attached to a vehicle or aircraft, such as a wing or fin, is denoted by 1. A rudder element 2 is attached to be eccentrically rotatable about a first shaft 3, which is rigidly attached to the vehicle or aircraft. On each side of a first chord plane 4 through the carrier element 1 a first door is arranged, denoted by 5 and 6. These doors are each arranged to be rotatable about a rotatable second shaft 7 and 8 close to the carrier element. Each second door is arranged to connect, with its edge 9 and 10 respectively, facing away from its second shaft, to the surface of the rudder element, in the case where the second chord plane 11 through the rudder element is located in parallel to the first chord plane 4, the two-way slotted rudder then being arranged in a neutral position, or where it forms an angle thereto in a direction towards said first door. It forms at said edge 9 or 10 together with the rudder element a slot 12, in the case where said angle a is formed in a direction away from said door. In each of the first doors a second door, denoted by 13 and 14, is arranged to be rotatable about the second shaft 7 and 8 and forms a window 15 and 16 in the first door in the case where the angle a is formed in a direction towards said first door, so that a flow path, denoted by 17, as is apparent from Fig. 2, is formed for the air.
As appears from Figs. IB - IE the second doors 13 and 14 can also (as is illustrated in the figures) be arranged to be rotatable about separate third shafts 30 - 33, which are located at a distance from the second shaft 8. In Fig. IE a variant is shown in which the door 14 is carried by a link 34 that is rotatable about a third shaft 33.
Fig. 1 relates to a two-way slotted rudder having an asymmetric carrier element and an asymmetric rudder element. The slot 2 constitutes in the example illustrated about 1.4% of the total chord length of the two-way slotted rudder, which is suitable. The desired function can be obtained in different ways, either in a purely mechanical way, comprising control discs and link systems, or electron ydraulically, or a com¬ bination of these two systems. In Fig. 2 parts of a mechanical control system are schematically indicated. A control disc 18 is attached to be rotatable about a third shaft 19 and controls the rotation of the rudder element 2 through links, not shown. In the first doors two control arms 20 and 21 are attached which are guided by tracks 22 and 23 in the rudder element. Said control disc 18 is provided with two guide tracks 24 and 25, which act on pivotable links 26, 27, 28 and 29 in order to control the movements of the second doors 13 and 14.

Claims

Claims
1. A two-way slotted rudder for fluid-dynamical application, in particular aero¬ dynamical application, comprising a carrier element (1), which is rigidly attached to a vehicle or aircraft and has carrier surfaces, in relation to which a rudder element (2) is attached to be rotatable about a first shaft (3) which is rigidly attached to the vehicle or aircraft, at each side of a first chord plane (4) passing through the carrier element (1) a first door (5, 6) being arranged, which is rotatable about a second shaft (7, 8) located at the carrier element, the first door being arranged to connect, with its edge (9, 10) that faces away from the second shaft, to the surface of the rudder element, in the case where the second chord plane (11) through the rudder element is parallel to the first chord plane (4) or forms an angle o: thereto in a direction towards said first door, and that it at said edge (9, 10) constitutes, in the case where said angle a is formed in a direction away from said first door, a slot (12) together with the rudder element, characterized in that a second door (13, 14) is attached to be rotatable about a third shaft (7, 8, 30 - 33) and forms a window (15, 16) in the first door in the case where the angle is formed in a direction towards said first door, so that a flow path (17) is formed for the fluid from the pressure side of the rudder element to the suction side thereof.
2. A two-way slotted rudder for aerodynamical application, characterized in that the extension of the slot (12) in a plane perpendicular to the first and second chord planes constitutes 0.3% to 3% of the total chord length of the carrier element (1) and the rudder element (2).
3. A two-way slotted rudder according to claim 1 or 2, characterized in that the extension of the slot in parallel to the first and second chord planes con¬ stitutes up to about 80% of the extension of the rudder element (2) in parallel to these planes.
PCT/SE1997/000385 1996-03-08 1997-03-06 Two-way slot rudder WO1997032779A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU19505/97A AU1950597A (en) 1996-03-08 1997-03-06 Two-way slot rudder
EP97907520A EP0883545A1 (en) 1996-03-08 1997-03-06 Two-way slot rudder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9600928A SE506264C2 (en) 1996-03-08 1996-03-08 Bidirectional Column Rudder
SE9600928-7 1996-03-08

Publications (1)

Publication Number Publication Date
WO1997032779A1 true WO1997032779A1 (en) 1997-09-12

Family

ID=20401737

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/000385 WO1997032779A1 (en) 1996-03-08 1997-03-06 Two-way slot rudder

Country Status (4)

Country Link
EP (1) EP0883545A1 (en)
AU (1) AU1950597A (en)
SE (1) SE506264C2 (en)
WO (1) WO1997032779A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001046008A1 (en) * 1999-12-20 2001-06-28 Saab Ab Arrangement in a rudder for an aircraft or watercraft
US8282038B2 (en) 2008-08-11 2012-10-09 Airbus Operations Limited Bi-directional flight control surface utilizing a split-track mechanism
EP2669189A1 (en) * 2012-05-29 2013-12-04 The Boeing Company Rotary actuated high lift gapped aileron
EP3181444A1 (en) * 2015-07-31 2017-06-21 Airbus Operations Limited A control surface for an aircraft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1506615A1 (en) * 1967-06-12 1969-08-28 Ver Flugtechnische Werke Control flap training and arrangement on a profile of an aircraft
US3677504A (en) * 1969-08-28 1972-07-18 Ver Flugtechnische Werke Control flap arrangement
EP0075966A2 (en) * 1981-09-29 1983-04-06 The Boeing Company Aileron system for aircraft and method of operating the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1506615A1 (en) * 1967-06-12 1969-08-28 Ver Flugtechnische Werke Control flap training and arrangement on a profile of an aircraft
US3677504A (en) * 1969-08-28 1972-07-18 Ver Flugtechnische Werke Control flap arrangement
EP0075966A2 (en) * 1981-09-29 1983-04-06 The Boeing Company Aileron system for aircraft and method of operating the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001046008A1 (en) * 1999-12-20 2001-06-28 Saab Ab Arrangement in a rudder for an aircraft or watercraft
US8282038B2 (en) 2008-08-11 2012-10-09 Airbus Operations Limited Bi-directional flight control surface utilizing a split-track mechanism
EP2669189A1 (en) * 2012-05-29 2013-12-04 The Boeing Company Rotary actuated high lift gapped aileron
EP2669190A1 (en) * 2012-05-29 2013-12-04 The Boeing Company Rotary actuated high lift gapped aileron
US20130320151A1 (en) * 2012-05-29 2013-12-05 Jan A. Kordel Rotary actuated high lift gapped aileron
CN103448904A (en) * 2012-05-29 2013-12-18 波音公司 Rotary actuated high lift gapped aileron
US9108715B2 (en) 2012-05-29 2015-08-18 The Boeing Company Rotary actuated high lift gapped aileron
EP2669189B1 (en) 2012-05-29 2017-04-12 The Boeing Company Rotary actuated high lift gapped aileron
EP2669190B1 (en) 2012-05-29 2017-05-10 The Boeing Company Rotary actuated high lift gapped aileron
RU2625384C2 (en) * 2012-05-29 2017-07-13 Зе Боинг Компани Rotation-driven aileron, set with a gap and creating high lift
EP3181444A1 (en) * 2015-07-31 2017-06-21 Airbus Operations Limited A control surface for an aircraft
US10279888B2 (en) 2015-07-31 2019-05-07 Airbus Operations Limited Control surface for an aircraft

Also Published As

Publication number Publication date
AU1950597A (en) 1997-09-22
SE9600928L (en) 1997-09-09
EP0883545A1 (en) 1998-12-16
SE506264C2 (en) 1997-11-24
SE9600928D0 (en) 1996-03-08

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