Leaping on the spot...

[iacob alex]

.....as a grass-hopper,due to a steam engine , at :
http://en.wikipedia.org/wiki/File:Marin ... engine.jpg

.....or, as a self-moving mass , due to a continuous gravity unbalance , at : http://www.geocities.ws/iacob_alex/Some ... ext036.jpg

Al_ex

[iacob alex]

.....as a continuous controversy , at :
https://m.notey.com/blogs/perpetual-motion
In a so long dispute...the truth is always lost...
Al_ex

[Bill_Mothershead]

Thank you, Alex.

That is a really good video about a fun perpetual motion machine.

The wheel turns and everybody knows it is not perpetual motion
but only two old British guys know the secret of how it really works.