Jed Rothwell wrote: > I wrote: > >> 2. The incredibly efficient transmission design. > > By the way, this transmission would not work without the electric > motor. It depends upon the high torque produced by electric motors at > low speed. > > I suppose that a fully electric vehicle with four independent motors > coupled directly to the wheels might be even more efficient. That > design would do away with the need for a transmission and > differential. You would have to trust the computer to keep the car on > the straight and narrow! > > Electric motors can be coupled directly to wheels, can't they? I > believe they operate through the full range of speeds on electric > railroads without gears. > > - Jed > >
I think the Martian rovers Spirit and Opportunity have such wheels. Harry
