DE8112039U1 - Fin for sailing board - Google Patents

Description

• ■ ·

Fin for sailing board

The innovation relates to a fin for a sailboard with a stabilizing surface that can be adjusted in the angle of attack.

Fins with stabilizing surfaces have the task of immersion to counteract the stern of sailboards in planing with aiming to achieve higher speeds.

In DE-GM 77 09 446, a stabilizing surface in the manner of a wing placed under protection, which is positioned at the fin end and is held by a groove connection. To an adjustment to different wind conditions and weight ratios of the sailor, the aforementioned innovation also provides an adjustment option for the float its angle of attack. For this purpose, the fin carries the float at their rear, downward-facing corner, viewed in the direction of travel, by inserting them into a recess of the pivotable Surface engages and both parts are connected to one another by an axis are. The float can then be adjusted on this axis after overcoming a frictional force.

! ι, ¹ 'In the Australian patent application 31 663 a stabilizing surface adjustable in the angle of attack is shown and described under the drawing i "J", which is received in a merely indicated mounting of two parallel brackets.

As you can easily see, both guarantee the status of the Technique-oriented designs, due to their type of fastening in general and their unstable construction in particular, insufficient security against damage when hitting or running into an obstacle. Collisions of the slightest kind lead to Adjustments of the angle of attack, if not to damage the bearings or on the float itself, which is expensive Entails repair work.

The aim of the innovation is therefore a fin for sailboards with a to create a stabilization surface adjustable in the angle of attack, with the risk of damage to the fin and stabilization surface are largely ruled out and, in addition, a quick assembly as well as a simple and safe positioning of the Stabilization surface on the fin allows.

The solution to the problem is that the stabilization surface consists of two individual components with molded contact surfaces that can be fixed on the sides of the fin at a preselectable angle of attack. The two stabilizing surfaces are preferably in the located in the middle of the sides of the fin. According to a further feature, the two stabilization surfaces are over together Screw connections, which are guided through holes in the fin, adjustable about an axis of rotation and can be fixed on the sides of the fin.

■ * ·

The holes can be designed as diametrically arranged elongated holes be, which lie on a circle running around the axis of rotation, and the two stabilization surfaces can with their Screw connections in the elongated holes can be continuously adjusted.

j; · 5 In a further embodiment it is provided that the molded '' Contact surfaces as centering surfaces provided on both sides of the fin

! Chen usable round bodies are designed.

1; With the division of the stabilization surface in connection with the

J; molded contact surfaces becomes an extremely stable construction in the

I 10 achieved with regard to a favorable introduction of force. Conditional here-I through and further through the protected positioning of the two

Individual components on the side surfaces of the fin can be damaged

|; by bumping into and running against obstacles as good as

I will be excluded.

I 15 The construction according to the innovation not only enables a very

fe easy and quick assembly, but also a problem-free one

[I Set the desired angle of attack according to the driving

f conditions.

i; According to a further feature of the innovation, the stabilization

| i 20 areas with cut-offs tailored to the weight of the sailor Markings provided with the aim of an additional variation

|; opportunity.

I ₁ : Last! The innovation is characterized by the fact that the two

; Stabilization surfaces on one that is significantly shortened in length

■ '25 fin are arranged and have an upwardly curved shape. ¹ As a result of the asymmetrical course of the flow, the

I arched shape creates additional buoyancy.

The following is an exemplary embodiment of the innovation based on the figures explained.

Show it

Fig. 1 the innovation according to the fin in a side view, Fig. 2 is a plan view according to the section line A-B in Fig. 1,

3 shows an enlarged illustration of the arrangement of the stabilizing surfaces on the fin in section along the line C-D in FIG. 1.

4 shows a cross section through a stabilizing surface in a modified form.

The fin 1 shown here, consisting of the fin sheet la and the mating surface Ib is in a known manner in a recess of the Surfboard, the so-called fin case, inserted.

According to the innovation, the stabilization surface is designed for immersion of the stern is to counteract, from two individual components 2 and 3 with molded round contact surfaces 2a and 3a formed in centering surfaces 4 can be used in the middle area of the fin on both sides and can be adjusted around an axis of rotation at a preselectable angle of attack are.

An increase in buoyancy can be achieved by means of an upwardly curved one Achieve the shape of the two stabilizing surfaces, according to Figure 4, The asymmetrical shape on the upper side of the stabilization surfaces results in a strong narrowing of the flow cross-section, which results in suction.

About common screw connections 6 through diametrical elongated holes 5, lying on a circle running around the axis of rotation, the two individual components 2 and 3 can be set at an angle of attack Set continuously and set on the centering surfaces 4.

As FIG. 1 illustrates, the fin used here can optionally be designed as a trimmed or as indicated by the dash-dotted line as a full-area fin.

In addition to the possibility of adjusting the angle of attack of the stabilization surface to vary with regard to different wind and weight conditions, the size of the stabilization areas can also be used be reduced, for which purpose these were provided with separating cut markings 7, which are matched to the weight of the sailor.

Claims (8)

rn -irfc t 9 »l ·· · f ·» «II Shark Wassersportgeräte GmbH 04/22/1981 On the heights of Bassum fin for sailing boards Protection claims: 1. Fin for sailboard with an adjustable angle of attack stabilizing surface, characterized in that the Stabil τη sierungsflache of two individual components (2, 3) with molded There is contact surfaces (2a, 3a) on the sides of the fin (1) can be set at a preselectable angle of attack. 2. Fin according to claim 1, characterized in that the two stabilizing surfaces in the central region of the sides of the fin are arranged. 3. Fin according to claim 1 and 2, characterized in that the two Stabilization surfaces together via screw connections ^), which are guided through holes in the fin, are adjustable about an axis of rotation and can be fixed on the sides of the fin. 4. Fin according to claim 3, characterized in that the bores are designed as diametrically arranged elongated holes (5) which lie on a circle extending around the axis of rotation, and which both stabilization surfaces with their screw connections in the elongated holes are continuously adjustable. I 1 I I I 5. Fin according to claim 1 to 4, characterized in that the molded Contact surfaces (2a, 3a) as provided in both sides of the fin Centering surfaces (4) designed round body insertable are. 6. fin according to claim 1 to 5, characterized in that the stabilizing surfaces are provided with separating cut markings (7) adapted to the weight of the sailor. 7. fin according to claim 1 to 6, characterized in that the two Stabilization surfaces on one that is significantly shortened in length Fin are arranged. 8. fin according to claim 1 to 7, characterized in that the two Stabilizing surfaces have an upwardly curved shape.