On 13 Feb, 21:08, Guy King wrote:
The message
from Richard Brooks contains
these words:

There was a great kids book in the local library that mentioned that
hydrogen peroxide mixed with manganese dioxide was what powered some
WWII torpedoes. There was also a small projectile launcher experiment
using the two same materials on the same page.

It's also believed to have polished off the Kursk.

--
Skipweasel
We have always been at war with Iran. [George Orwell - almost]

Yes - and a British sub in Gibralter sometime ago. There was
something involving brass/copper and the hydogen peroxide - can't
remember whether everything had to be of these two or whether it was
the other way round.

Judging from the stories coming out of the Old Bailey, hair-dressers'
suppliers seem to be the source - but don't go and buy a box full !!

Rob