Alang wrote:

I think the Germans experimented with energy storage systems in buses
back in the early 1930s, they used a heavy flywheel system which absorbed
energy when breaking and releasing it for accelerating, ideal for a stop
and start vehicle but god knows how they arranged the pulley/ gear train
to achieve the necessary power transfers.
Interesting though!!
Don

Swiss
http://www.newscientist.com/article/...ywheel-firsts-
.html

British.

Double deckers buses featuring flywheels were manufactured in the 1930s.
They featured in the "Modern Wonder" magazine.