Abstract: A device utilizing a system of photobeam measurers to detect the speed imparted to a golf ball by a golfer that is utilized with a golf club of adjustable weight and design for determining the optimum club design for a particular individual golfer being tested. The device is used in a method of custom-fitting golf clubs in which the proper swing weight, length, and lie and loft angles of a golf club are determined. The method of fitting consists in a series of steps in which a golfer hits a series of balls through the photobeams with a club which is incrementally lengthened, weighted, and has its lie angle adjusted. The adjustments are made until the point is reached at which the golfer imparts maximum velocity.

Abstract: A balloon has an airfoil-shaped member connected to its top surface. The airfoil-shaped member has a top curved skin with a plurality of parallelly-spaced partitions which form therebetween a plurality of air passageways for air. Upon the descent or lateral movement of the balloon, the airfoil-shaped member is expanded to provide a vertical stabilization of the balloon and to afford better control of the balloon during the lateral travel thereof.

Abstract: An apparatus incorporating an electrobalance mechanism to measure the dynamic swing weight of a sporting implement.