West Coast have been using cable

Hi,

Many racers out here on the West Coast have been using cable steering “forever”, but I had to be contrarian and use rack-n-pinions and tillers. Until… the Beach Party Buggy arrived. This vehicle was built with fabulous craftsmanship by professional fabricators, but they were not vehicle dynamics engineers. I converted the Buggy from four wheels with no suspension to three wheels (which needs no suspension). Once the front fork was mounted, it was obvious that this was the perfect opportunity to try steering by steel cables. I installed a pulley on top of the front fork, and a hand crank between the front seats. Such an arrangement needs a lot of “gearing”, so the pulley up front is something like 9 inches in diameter, and there is no pulley at all on the hand crank – just the ¾ inch shaft itself. And it still could use more reduction. Many racers use a bicycle rim for the pulley. 
Installing this, the cable needed to be wrapped many times around the shaft, and I tried to wrap it in a tight orderly spiral. But this cable was too stiff, and I wound up happy that the cable stayed on the shaft at all while I tightened the turnbuckle. I left it on the loose side, because the cable would obviously be “tripping over itself” when I turned the handle. 
Guess what…? It worked great, right off the bat! The cable is slowly being chewed apart where it goes thru the hole in the shaft, but this can be easily monitored and the cable replaced as needed. The slack I allow in the cable so it can wrap over itself on the shaft without over-tightening causes no trouble at our low speeds.

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Thanks

 

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