Simon,My limited experience in this has shown me that steel is used because of the cost factor. I guess dollar for dollar, it is the cheapest and easiest material to work with. As far as weight is concerned, the subs NEED weight anyway so why not incorporate some of that into the pressure hull with steel ? ...that's how it seems to me.Myles.----- Original Message -----From: SIMON WALKDENSent: Saturday, October 29, 2005 3:33 PMSubject: [PSUBS-MAILIST] carbon fibreI'm sure this question has been asked before, but why hasn't anybody made a pressure hull out of carbon fibre? Apparently it's 5 times as strong as steel, and good for reinforcing aluminium. Sounds like a logical, light-weight, low-cost alternative
-Simon