Push-up system for towing kites with variable angle of attack and single skin surfaces

Abstract

A push-up system for towing kites with variable angle of attack and single skin surfaces is disclosed.

Description

State of the art

[0001] Double-skin or single-skin towing kites are preferably used for kite landboarding, buggy riding, or snowkiting. These towing kites regulate their pulling force by adjusting the angle of attack of the entire towing kite by lowering or raising the trailing edge. To minimize crash susceptibility on hard surfaces and improve light wind performance, the single-skin construction of towing kites is receiving increased attention in its further development. For example, DE 202018003459U1 enables pulling force regulation by adjusting the angle of attack of the wing profile using a pulley system.However, in the aforementioned invention, in addition to minimizing traction at a flatter angle of attack, partial deformation of the flexible single-skin panels toward the trailing edge also occurs, resulting in a wavy formation of the single-skin surfaces and thus negatively altering the optimal wing profile by lowering the sailcloth in the rear area. Due to their design, these single-skin surfaces begin to flutter quite quickly at a flat angle of attack, and the kite loses its optimal propulsion characteristics. Representation regarding the invention

[0002] The solution to this problem, as described in the protection claim, is based on the idea of ​​creating a reinforcement for towing kites with single skin surfaces in order to maintain a flutter-free wing profile at a flat angle of attack for the purpose of minimizing towing power, so that the wind window does not decrease and the flight speed remains high at lower angles of attack. Brief description of the drawings

[0003] The invention is explained in more detail below using exemplary embodiments; the figures are shown schematically. Fig. 1 shows the push-up system according to the invention with bundled attachment of the bridle lines and deflection system on a single skin kite. Fig. 2 shows a sectional view of the push-up system according to the invention on a wing profile with a single skin surface. Fig. 3 shows an oblique sectional view of the push-up system according to the invention on a section of a single skin kite with a high angle of attack, with the rear area shown transparent for clarity. Fig. 4 shows an oblique sectional view of the push-up system according to the invention on a section of a single skin kite with a flat angle of attack, whereby the rear area is shown transparent for clarity. Fig. 5 shows an oblique sectional view without the push-up system according to the invention of a section of a single skin kite, with a high angle of attack, whereby the rear area is shown transparent for clarity. Fig. 6 shows an oblique sectional view without the push-up system according to the invention on a section of a single skin kite, with a flat angle of attack, whereby the rear area is shown transparent for clarity. Fig. 7 shows in lower view the push-up system according to the invention on a hybrid kite with individual single skin surfaces, Detailed explanation of the drawings

[0004] Fig. 1 gives an overview of the push-up system according to the invention, consisting of spacers 6, surface stabilizer 7 with flexible forming rod 8, the transverse stabilizers 9 and their attachment points 10, which is installed on a towing kite 1 with leading edge 2 and trailing edge 3, with simple sailcloth 4 and panel keels 5 in between and is guyed by a bridle line system 11 which is not described in more detail.

[0005] Fig. 2 gives an overview of the push-up system according to the invention on the wing profile of a single skin kite, consisting of spacer 6, surface stabilizer 7 with flexible forming rod 8, the transverse stabilizers 9 and its attachment point 10, which is attached behind a leading edge 2 and in front of the trailing edge 3 to a simple sailcloth 4 in between.

[0006] Fig. 3 shows the adjacent air flow 14 in a lateral sectional view on the upper side of the towing kite 1 at a higher angle of attack, wherein for clarity the rear area of ​​the single skin surface is shown transparent in order to show the push-up system according to the invention, consisting of spacer 6, surface stabilizer 7 with flexible forming rod 8, the transverse stabilizers 9 and its attachment point 10, which is attached behind a leading edge 2 and in front of the trailing edge 3 to an intermediate simple sailcloth 4 with panel keels 5 and forms a dimensionally stable structure, wherein a bridle line system 11 (not described in more detail) guyed the towing kite 1.

[0007] Fig. 4 shows the adjacent air flow 14 in a lateral sectional view on the upper side of the towing kite 1 at a flat angle of attack, with a bridle line system 11 not described in more detail, wherein for clarity the rear area of ​​the single skin surface is shown transparent in order to illustrate the push-up system according to the invention behind a leading edge 2 and in front of the trailing edge 3 on an intermediate simple sailcloth 4 with panel keels 5, wherein the tensioned transverse stabilizers 9 press the spacer 6 with attachment point 10, the surface stabilizer 7 and flexible forming rod 8 upwards in order to significantly increase the wing profile form stability.

[0008] Fig. 5 shows the adjacent air flow 14 in a lateral sectional view on the upper side of the towing kite 1, wherein for clarity the rear area of ​​the single skin surface is shown transparent, on which the simple sailcloth 4 with panel keels 5 is located between the leading edge 2 and trailing edge 3, but without the push-up system according to the invention through the combination of an increased angle of attack, as well as the adjacent air flow 14, achieves its shape stability and is held by a bridle line system 11 which is not described in more detail.

[0009] Fig. 6 shows the adjacent air flow 14 in a lateral sectional view on the upper side of the towing kite 1 at a flat angle of attack, wherein for clarity the rear area of ​​the single skin surface is shown transparent, which is held by a bridle line system 11 not described in more detail, wherein the simple sailcloth 4 with panel keels 5 is located between the leading edge 2 and trailing edge 3 and due to the lack of the push-up system according to the invention the air flow 14 can no longer adhere optimally, so that the dimensional stability of the simple sailcloth 4 in the rear area is prevented and the simple sailcloth 4 pushes through downwards, with the result that the towing kite 1 deteriorates its flight behavior and begins to flutter.

[0010] Fig.7 gives an overview of the push-up system according to the invention on a hybrid kite, consisting of spacer 6, surface stabilizer 7 with flexible forming rod 8, the transverse stabilizers 9 and its attachment points 10, which is installed on a towing kite 1 with leading edge 2 and trailing edge 3, with air-filled chambers 12 and air inlet opening 13 in between, as well as sections of simple sailcloth 4 with panel keels 5 and is guyed by a bridle line system 11 that is not described in more detail. List of reference symbols 1 towing kite 2 leading edge 3 trailing edge 4 simple canvas 5 panel keel 6 spacers 7 Wing stabilizer 8 flexible shaping sticks 9 Anti-roll bar 10 attachment points 11 Bridle line system 12 air-filled chambers 13 Air intake opening 14 Air flow QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 202018003459U1

[0001]

Claims

[1] Push-up system for towing kites (1) with variable angle of attack and simple sail surfaces (4), consisting of at least one spacer (6), at least one transverse stabilizer (9) and attachment points (10). [2] Push-up system according to claim 1, the shape stability of which is supplemented by at least one surface stabilizer (7) and flexible shaping rods (8). [3] Push-up system according to claims 1 and 2, which is also used on hybrid kites with simple sail surfaces (4), in combination with air-filled chambers (12).

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