[PSUBS-MAILIST] main pressure hull thicknes?

[Håvard Hardy]

i was thinking about calling a estmatet cost of the main pressute hull here
in norway. just so i have clue about what it would cost to build a sub. but
cant really find ut how thick the pressute hul have to be.. i am thinking
that it would have to be 10 - 12 mm thick? whit ribs. to get to 500 meteres
safe.

tried using the design tool on the web paige, but the site dosent work..

Diameter 1 meter. length: 4.5 meters.
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