Hi Richard, just re-reading this (It's all repeats on the TV so I thought I'd enjoy a few of these repeats!).I read somewhere that during WWI someone had tried to use steam powered cannons. Apparently they worked very well but something went wrong. It might have been that it rusted the barrels but I'm not sure what happened. Of course, the cannons needed one heck of a steam generator which would not have been mobile. On ships they might have worked well because their mobility would have been on the ship itself, and thus not really a necessity to be mobile. Has anyone else ever heard of this? I'm very curious as steam pressure can move mountains.
I hadn't realised how true your words are about steam moving mountains, until I remembered Mount St. Helens in Washington (State), Eckyafettle (can't spell it, or pronounce it!) in Iceland and other volcanoes. The steam is created by glaciers, ice-caps or lakes collapsing into a large lake of molten magma, or a mountain of very hot rock, and flashing to steam.... the ensuing steam pressure blowing the top half of mountains many miles! - Literally Steam does move mountains!
Maybe Volcanoes are the ulyimate demonstration that not all "flash steamers" are safe?
Makes one think that the "old faithful" geyser in Jellystone park is the boiler safety valve venting a bit of heat?
Cheers!
K2