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
