SE506264C2 - Bidirectional Column Rudder - Google Patents

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 alpha 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 alpha 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 alpha 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

z 506 264 Figure 2 shows a view towards a cross section of a part of an alternative design of the object in Figure 1A.

The ur gures denote a vehicle-fixed support element, with support surfaces, such as a wing or a fin, with 1. A rudder element 2 is eccentrically mounted pivotally on the ring first vessel fixed axis 3. On each side of a 1st cord plane 4 through the support element 1 a 1st is arranged door, denoted by 5 and 6. These doors are arranged pivotable about each pivotable 2nd shaft 7 and 8 next to the support element. Each 1st door is arranged to with its from its 2nd axis facing edge 9 and 10, respectively, connect to the surface of the rudder element, then a 2nd chord plane 11 through the rudder element is parallel to the 1st chord plane 4, wherein the two-way gap rudder is in the neutral position, or forms an angle α with this in the direction of the said 1st door. This forms at the said edge 9 or 10 a gap 12 with the rudder element when the said angle ot is formed in the direction from the approached door. IN each of the 1st doors is a 2nd door, designated 13 and 14 arranged pivotable around the 2nd shaft 7 and 8 and opens an opening 15 and 16 in the 1st door when the angle ot formed in the direction of said door, so that a flow path, denoted by 17, as shown in Figure 2, is formed for the air.

As shown in Figures 1B-1F, the 2nd doors 13 and 14 (shown in Figures) also be arranged pivotable about separate 3rd axles 30-33, placed at a distance from the 2nd axis 8. In IF gur IF a variant is shown, where the door 14 is supported by a link 34 which is pivotable about a third axis 33.

Figure 1 relates to a two-way gap rudder with asymmetrical support element and asymmetrical rudder element. The column 2 in the example shown constitutes about 1.4% of the two-way column rudder total cord length, which is appropriate.

The desired function can be achieved in various ways, either purely mechanically, with guide discs and canvas systems, or electrohydraulic, or a combination of both system. Figure 2 schematically indicates parts of a mechanical control system. A guide disk 18 is mounted rotatable about a 3rd axis 19. and controls the rudder element 2 via links not shown twist. In the 1st door frames are fixed two guide arms 20 and 21 which are guided by grooves 22 and 23 in the rudder element. The said guide disc 18 is provided with two guide grooves 24 and 25, which affects pivot links 26, 27, 28 and 29 to control the 2nd doors 13 and 14 movements.

Claims (3)

3,506,264 Patent claims A two-way split rudder for flidynamic application, in particular aerodynamic, comprising a vehicle-fixed support element (1) with bearing surfaces, relative to which a rudder element (2) is pivotally mounted about a vehicle-fixed 1st axis (3), each side of a chord plane (4) through the support element (1) a 1st door (5,6) is arranged, pivotable about a 2nd axis (7,8) next to the leg element, the 1st door being arranged to with its from the 2nd axis facing edge (9, 10) connect to the surface of the rudder element, when a 2nd chord plane (1 1) through the rudder element is parallel to the 1st chord plane (4) or forms an angle ot therewith in the direction of the said 1st door, this at the said edge (9, 10), when said angle ot is formed in the direction from said 1st dune, forms a gap (12) with the rodex element, characterized in that a 2nd_door (13, 14), is arranged pivotable about a 3rd axis (7,8, 30- 33), and opens an opening (15,16) in the 1st door when the angle ot is formed in the direction of the said 1 : a the door, so that a flow path (17) is formed for fl uidet from the pressure side of the rudder element to its suction side. Two-way gap rudder for aerodynamic use, characterized in that the extent of the gap (12) in a plane perpendicular to the 1st and 2nd chord planes constitutes 0.3% to 3% of the total chord length of the support element (1) and the rudder element (2). Two-way gap rudder according to claim 1 or 2, characterized in that the extent of the gap parallel to the 1st and 2nd chord planes constitutes up to about 80% of the extent of the rudder element (2) parallel to these planes.