Remember a while back there was a mild hubbub about whether a wind-powered vehicle could travel faster than its own tailwind? There was quite a bit of controversy about it among makers and physicists, until Rick Cavallero unequivocally proved it could be done.
Since he set out what he intended to do, Rick’s Blackbird Wind Vehicle is for sale on ebay. Bidding at time of publication is just $265. It promises a 2.8x downwind speed. Any takers?