Torpedo Engine,
I once imported from Sweden for a client a packing case full of engine bits from allsorts of engines, one in particular foxed us until we asked the client what it was, and indeed it was a pressurised gas operated V8 made entirely of Brass, Phospher Bronze and Copper, nil lubrication system( as it would lonly run once) and the carnk case took the shape of the diametre of the body of the Torp which looked like it could have been about 30" Dia, very strange looking V8 , all screws, nuts amd washers were also Non ferous metal, it weighed about 250Kilos.
Peter R-B
Vfrpilotpb