Hi Geoff P,
Not a problem, I think I will do the drawings and when they are complete I will post a thread in the 'Model Boating' section saying they are available so anyone that wants them can say so- of course I will PMM everyone who has expressed interest on this thread first.
It's 50"LOA and 11.5" beam and about (I havn't measured) 3.5" draft BWL.
Circlip,
You know more than me!!!! I havn't measured the calibre yet- but at a quick look I would say about 6mm -/+ .5mm. I like model guns as pieces of engineering, nothing else, so while I know what to look for as regards making it work, I don't know the first thing about it's history or who would have made it.
Your theory regarding a junior rating's project may be a good one- one of my crewmates on Gondola who worked at BAE systems for years said when he did his machining courses the navy ratings in the workshop who were going on to ordnance and artillery engineering would make miniature artillery or small parts for full size guns.
I will search Hilti Cartridges and WEB, trhanks for the lead.
Greg