From Peter Murray
As I read your article on electric vehicles that charge while parked (25 January, p 20), I recalled that when I was in Switzerland in 1996, I saw buses that spun up a flywheel using an electric motor powered by contact with a pole at the bus stop. The bus then used the flywheel to drive the wheels as it trundled to the next stop.
I do wonder if those buses are still trotting along.
Bellbowrie, Queensland, Australia
