Quote Originally Posted by SGWilko
In the back of my mind in respect of 2009/KERS is the fact that, some 10 years ago, McLaren had a system ready to run. Now, if they have continued to develop this in the background, the potential for them to have a very robust, reliable and well packeged system is enormous.
IIRC there was an article in Motorsport about this not so long ago. Adrian Newey was developing it while at McLaren and initially the FIA approved the system. Newey continued work until a KERS-type system was ready for testing/racing (not sure which) at which point the FIA changed their minds.

Who knows whether McLaren have continued to develop the idea in some shape or form, or perhaps Newey took the concept with him when he went to Red Bull...