What about the ones where you pump water to the top of a hill? The lift on
the cliffs at various places around England were operated by counterbalances
witch were filled or drained of water.
Brian

--
--
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Max Demian" wrote in message
o.uk...
On 22/08/2020 17:27, harry wrote:
https://www.youtube.com/watch?v=_QLEERYS5C8

Flywheels aren't the only mechanical batteries available. There are
gravity based batteries like the "accumulators" used to work the bascules
of Tower bridge.

--
Max Demian