If you modified the swing arm on a bike, and put a truck rim and tire on the bike..... would it float enough that you could ride it on the water? Maybe put a ski instead of a front wheel?
Jim Garlitz, a man who runs a pizza shop in Maryland, has combined a Yamaha Virago motorcycle with an outboard engine to create, uh, this thing, the water chopper. Capable of doing 37 mph, it looks like it was invented long ago and called the jetski. It also looks like I wouldn't want to get on it. Unless I was using it as a pirating vessel to rob all the stupid tourists that rent those floating big wheel bikes at the beach.
And lets not forget,
I guarantee that with enough tire (think life preserver) anything will float. I had a Honda big red three wheeler which floated quite well.... upside down after I drove it over the edge of a bluff. not pretty, but not on the bottom either
When I was a kid (and long before sleds had the power-to-weight ratio to maintain a plane on the water), there were clubs in southern PA who would skip their Ski-Doos across a pond to see who could reach the far bank. They were all tethered with a cable to pull out the losers.Around here we have a style of racing..... Not joking here.... they take completely unmodified snow-mobiles and race them, in a circle, on the water. And it is during the summer. No the lake is not frozen.
A Gyro copter will in fact Gyro safely to the ground as long as there is sufficient forward motion prior to engine failure. If you were, say, doing a vertical movement, it would return to earth along the same path that it ascended.
Also the distinction between a Helli and a gyro: a Gyro must have a rearward or forward facing propeller as it will not ascend without forward motion. Once airborne the propeller is slowed and stopped in favor of the rotor blade doing the work.
( I read popular mechanics hey)