Bob Minchin formulated the question :
Years ago, there was a prototype electrical generator shown on TV - possibly
Tomorrow's World etc.

It was a low ramp on which one wheel of a vehicle was driven and parked.
In the ramp was a pair of rollers driving a generator. The other vehicle
wheels were chocked. With the car in gear and at tickover speeds a useful
amount of power was generated.
I seem to recall the demonstration was a farmer going out to repair a gateway
and being able to run an electric drill to assist the repair.

I can remember it vaguely.


Does anyone know if this was ever taken to a commercial product and have any
references to it?

I've not seen anything, probably it wasn't that practical.

Likely the same could be achieved using an additional alternator, under
the bonnet. Or there are plenty of small portable genny sets about now,
for not much money.

I have an application where something like this would be a possible solution.

I'm listening?

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk