Golf club, jetdrv driver for increased distance and accuracy

Abstract

A golf club, a driver, designed to provide an inprovement in the accuracy of ball control as club head speeds are increased from 100 miles per hour to the level of a semipro at 120 miles per hour. Most forces on the club head increase as the square of the velocity, representing a forty four percent increase. A detailed analysis has been made of forces generated during the collision of the ball and club head and their effect on trajectory of the ball. The design proposed greatly reduces the aerodynamic drag of the clubhead, increases the allowable tolerance to angular misalignment of the club striking face from two degrees to ten degrees and reduces the torque that twists the club head causing an angular misalignment prior to contact with the ball.

1 . A golf club, driver, is designed with a nacelle surrounding the clubhead. This nacelle is designed to capture a stream tube of air that enters the club head, the internal air passage shape provides an increasing diffusion volume, reducing the air velocity, thereby increasing its pressure. The air is then expanded by discharging it, at near sonic velocity, through the nozzle at the rear of the club. The ram drag of the air entering the club is balanced by the jet thrust resulting from the change in momentum. The drag is then limited to skin friction on surface area exposed to air flow. This drag is far less than the blunt body drag of a conventional clubhead.  
   
   
       2 . A hosel of an aerodynamic airfoil design to reduce the drag.  
   
   
       3 . Four symetrical airfoil shaped struts supporting the nacelle and capable of transmitting the inertia load of the nacelle to the striking head of the club. One strut is alligned with the hosel as an extention to attach the club shaft to the clubhead.  
   
   
       4 . Clubhead with a external shape designed to provide the area distribution within the nacelle for diffusing the air as it passes through the club. The clubhead is hollow to control the weight and the center of gravity location relative to the shaft centerline.  
   
   
       5 . The striking face of the clubhead is thick and contoured to make it rigid and give it a high natural frequency on impact with the ball. The deformation shape of the ball is controlled by the striking face acting as an anvil to deform the ball. Spin and spin direction and force to accelerate the ball is controlled by the shape of the striking surface. The magnitude of the force is dependent on the mass of the clubhead and its velocity at time of impact.  
   
   
       6 . The contour of the striking face of the clubhead is designed to increase the tolerance to angular misalingment from about two degrees in the conventional driver to ten degrees for the proposed driver.  
   
   
       7 . Three recessed triangles on the top surface of the clubhead define the location of the sweet spot and a measured distance on the contoured striking face that can be used by the highly proficient golfer for making controlled hooks and slices. They can also be used to compensate for high crosswinds giving a reduced drag and improved distances.  
   
   
       8 . A roll pin is added to provide a mechanical attachment as backup to the cement bond of the dissimilar meterials in the shaft and clubhead.