CH573256A5 - Ski for long distance jumping - has fairing over ski tip to reduce air resistance and drag - Google Patents

Abstract

The fairing (3) is made from plastic, rigid expanded plastic foam or inflated rubber. It has a thin section for lightness and an aerofoil shape, its top edge blending in from the ski tip (2) to a point on the ski body (1) and its bottom edge shaped to fit the curve of the ski. At the front, the fairing has a hook (4) for positioning over the end of the ski tip, its other end having two holes (5) for fixing screws into the ski body. This reduces air drag by approximately 50% at speeds over 30 metres per second, where being used for ski jumping.

Description

  

  
 



   The object of the present invention is a ski.



   The aim of the invention is to improve the penetration of the ski in the air by reducing its aerodynamic drag.



   This ski is characterized by the fact that its tip has an aerodynamic body extending it so as to reduce its aerodynamic drag.



   The accompanying drawing represents, by way of example, one embodiment of the invention.



   Fig. 1 is a partial profile view of this ski.



   Fig. 2 is a partial plan view.



   Fig. 3 is a partial end view.



   Fig. 4 represents diagrams showing the results obtained with a ski according to the invention.



   The ski shown in FIGS. 1 to 3 presents a slat 1 terminated by a spatula 2.



   On this tip 2 is fixed an aerodynamic body 3 extending this tip and reducing the aerodynamic drag as shown in FIG. 4, curve A represents the drag of an ordinary ski, curve B represents the drag of a ski whose tip 2 carries an aerodynamic body 3. It can be seen that the drag of the ski is reduced by approximately 50% at high speeds. equal to or greater than 30 m / s.



   This aerodynamic body 3 is preferably removable. It is mounted on the end of the spatula 2 by its part 4 forming a hook, the thin trailing part 5 being fixed to the slat by means of two screws 6 for example.



   Body 3 is light. It can be produced in the form of a hollow body, the wall of which is made of fine and resistant plastic material made of macrolon, nylon and other similar materials.



   It could also be of inflatable rubber or of foamed plastic.



   The advantages of this ski, in addition to the reduction in its aerodynamic drag, are as follows.



   The vibrations of the spatula at high speeds are suppressed.



   The two skis can hardly cross.



   Finally, the stability is increased.



   CLAIM



   Ski, characterized by the fact that its tip has an aerodynamic body extending it so as to reduce its aerodynamic drag.

 

   SUB-CLAIMS
 1. Ski according to claim, characterized in that said body is hollow.



   2. Ski according to claim and sub-claim 1, characterized in that the wall of said hollow body is made of plastic, thin and strong.



   3. Ski according to claim and sub-claim 1, characterized in that said hollow body is made of rubber and is inflatable.



   4. Ski according to claim, characterized in that said body is made of foamed plastic.



   5. Ski according to claim and any one of subclaims 1 to 4, characterized in that said body is removably attached to the spatula.

** ATTENTION ** end of DESC field can contain start of CLMS **.



   

 

Claims (1)

** ATTENTION ** start of field CLMS can contain end of DESC **. The object of the present invention is a ski. The aim of the invention is to improve the penetration of the ski in the air by reducing its aerodynamic drag. This ski is characterized by the fact that its tip has an aerodynamic body extending it so as to reduce its aerodynamic drag. The accompanying drawing represents, by way of example, one embodiment of the invention. Fig. 1 is a partial profile view of this ski. Fig. 2 is a partial plan view. Fig. 3 is a partial end view. Fig. 4 represents diagrams showing the results obtained with a ski according to the invention. The ski shown in FIGS. 1 to 3 presents a slat 1 terminated by a spatula 2. On this tip 2 is fixed an aerodynamic body 3 extending this tip and reducing the aerodynamic drag as shown in FIG. 4, curve A represents the drag of an ordinary ski, curve B represents the drag of a ski whose tip 2 carries an aerodynamic body 3. It can be seen that the drag of the ski is reduced by approximately 50% at high speeds. equal to or greater than 30 m / s. This aerodynamic body 3 is preferably removable. It is mounted on the end of the spatula 2 by its part 4 forming a hook, the thin trailing part 5 being fixed to the slat by means of two screws 6 for example. Body 3 is light. It can be produced in the form of a hollow body, the wall of which is made of fine and resistant plastic material made of macrolon, nylon and other similar materials. It could also be of inflatable rubber or of foamed plastic. The advantages of this ski, in addition to the reduction in its aerodynamic drag, are as follows. The vibrations of the spatula at high speeds are suppressed. The two skis can hardly cross. Finally, the stability is increased. CLAIM Ski, characterized by the fact that its tip has an aerodynamic body extending it so as to reduce its aerodynamic drag. SUB-CLAIMS 1. Ski according to claim, characterized in that said body is hollow. 2. Ski according to claim and sub-claim 1, characterized in that the wall of said hollow body is made of plastic, thin and strong. 3. Ski according to claim and sub-claim 1, characterized in that said hollow body is made of rubber and is inflatable. 4. Ski according to claim, characterized in that said body is made of foamed plastic. 5. Ski according to claim and any one of subclaims 1 to 4, characterized in that said body is removably attached to the spatula.