Abstract: An impeller golf club of the type having a piston with a face plate mounted on the club head which stikes a golf ball when a cartridge in the club head is detonated wherein the improvement is a safety feature which prevents the cartridge from being detonated unless the club is positioned in substantially the required position for striking the ball. The safety feature includes three balls, each free to roll in its own groove. Any one of the balls may interfere with actuating depression of the trigger button unless the club is located in the safe range of positions. The cartridges are retained in a cartridge holder that is insertable in the club head and secured by a cam that is released by the user turnng a cam handle.

Abstract: A radial internal combustion engine with a rotatable cam unit. A cam follower is attached to the end of each rod connecting rod for engagement with the cam unit. Rod guide means is provided to maintain alignment of the connecting rods. A further embodiment also provides that three rollers, which rotate about a common axis, provide engagement with the cam unit.

Abstract: A golf club for impelling a golf ball without swinging. The club uses expanding gas generated by an exploding charge to move a piston having an attached strike plate against a golf ball, impelling the ball down the fairway toward the green. The club is prepared for use by inserting an explosive charge and cocking the firing mechanism. The club is fired by placing the head of the club a short distance behind the ball, aiming the ball by aligning the striking plate with the ball, releasing a safety, and triggering the firing mechanism.