Powerful combustion mini?
Threads about mini hybrids:
http://www.spudfiles.com/forums/viewtopic.php?t=1975&
http://www.spudfiles.com/forums/viewtopic.php?t=1061&
http://www.spudfiles.com/forums/viewtopic.php?t=1357&
http://www.spudfiles.com/forums/viewtopic.php?t=1867&
and the most famous: http://www.spudfiles.com/forums/viewtopic.php?t=236&
Takes 2 seconds to find them: just click on the Submit Hybrid Cannons and Official Hybrid cannons.
And, yes, small metal cannons that can hold a lot of pressure have been built. One that I know uses steam.
http://www.spudfiles.com/forums/viewtopic.php?t=1975&
http://www.spudfiles.com/forums/viewtopic.php?t=1061&
http://www.spudfiles.com/forums/viewtopic.php?t=1357&
http://www.spudfiles.com/forums/viewtopic.php?t=1867&
and the most famous: http://www.spudfiles.com/forums/viewtopic.php?t=236&
Takes 2 seconds to find them: just click on the Submit Hybrid Cannons and Official Hybrid cannons.
And, yes, small metal cannons that can hold a lot of pressure have been built. One that I know uses steam.