X and Robinson Helicopters have partnered to develop a battery-electric helicopter demonstrator based on the R66 helicopter.

Most electric cars aren't normally associated with performance, but they are able to achieve something gasoline-powered cars can't: peak torque at zero rpm. It's thrown around often, and many will ...

And with the typical electric motor capable of sustaining 20,000 RPM, the top speed often isn't even a limiting factor. There's more that goes into this, too—delightful math and delicious graphics.