World of Sport  13 of sport’s biggest fads  Your eyes are not
deceiving you: This really is a six-wheeled F1 car  Yesterday's
revelation of a crazy new gadget promising to "transform tennis
forever" might turn out to herald a sporting revolution.  But
let's face it: it probably won't. Millions of man hours each
year are spent by crackpot inventors and multinational
corporations trying to create some sort of money-spinning
technological marvel. Once in a generation something genuinely
useful comes along, of course; but most of the time the results
of those labours is a pile of junk that ends up gathering dust
in a cupboard somewhere.  So we decided to take a nostalgic look
back at the things we thought would take off but never really
did in the world of sport - starting with that tennis racquet
sensor, which we sense could end up on a list such as this in a
few years' time...  - - -  RACQUET SENSOR - The Babolat Play
Pure Drive which, like Sony's Smart Tennis Sensor, has been
released with the promise of trans