| 摘要 |
Swinky™ is a pendulum golf swing trainer. It weighs about six pounds, folds up like an umbrella, and can be unfolded and set up without tools in a moment. It comprises a long, stiff, ultra-light pendulum arm that hangs atop a mast, planted on a sure-footed tripod opposite the golfer's chin. The golfer's club makes up at least 98% of the weight of the pendulum bob. The other vital 2% of the bob's weight is provided by the device's low-inertia, visually graphic rectangular string bridge, one end of which is anchored on the neck of the club shaft and the other on the tip of the pendulum arm. The club swings accompanied by the bridge quite unaffected by its presence as long as the club's center of mass tracks parallel to and centered with the sweep of the pendulum arm. Exploiting rectangle feedback is simple. Preset the mast angle to match the lie angle of the club shaft and the top of the mast to the height of the golfer's own chin at address. Start and complete swings with the bridge just sufficiently tensioned to form the rectangle. Proper swings are confirmed by steadiness of the mast and tripod throughout the swing, along with air speed whistling that peaks at the bottom of the swing. A faulty swing at any point instantly deforms the rectangle and rocks the mast and tripod.
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