[JamesH]

Originally Posted by wnut

I think that Newey proved quite convincingly that ballast was more efficient than KERS and batteries.

Rosberg then proved that you can drag a dead KERS unit around for half a GP and still finish second, so they would not seem to be much use in the economy stakes either.

"Simplificate and add lightnes" worked for Chapman and would probably be hugely more efficient than KERS.

P.S. Wankels give huge power but they are very inefficient, turbine perhaps?

He may have proved it with the tech at the time, but the tech has improved much over the last 2 years, and of course the amount of storage was artificially limited to a low level at the time. I seriously doubt it's true now.