彈簧腿傑克
The Velocette Spring Heeled Jack is a motorcycle built by Velocette at Hall Green, Birmingham, England. This famous works KSS 350cc, sprung frame, Velocette was a prototype and as such the only one ever built by the Hall Green factory. The bike was christened Spring-heeled Jack by Harold Willis, and has been known by that name ever since by enthusiasts all over the world. First registered in May 1927, the motorcycle was a one-off built for Alec Bennett, the factory's number one rider, and was unsuccessfully tried in the practice sessions of the 1928 Isle of Man TT. This bike retained the factories hand change mechanism although the positive stop foot change was to be seen on the other race bikes of that year, and also had a straight through exhaust pipe.