On 23/08/2020 12:13, N_Cook wrote:

snip


https://en.wikipedia.org/wiki/Fireless_locomotive


Don't know about locomotives , but for road transport ,they came to an
abrupt abondonment. All is fine until there is an accident. The flywheel
dislodges and continues like a much more energetic panjanderam,
demolishing everyone and everything in its very long path.

These never caught on either...

https://en.wikipedia.org/wiki/Gyro_monorail

....but it doesn't con men trying...

https://www.litmotors.com/

--
Cheers
Clive