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[PSUBS-MAILIST] mounting acrylic dome in fibreglass



Hi guys,
I'm building a small epoxy/fiberglass 1 atmosphere sub and are wanting to embed an acrylic dome in a block of epoxy resin/fiberglass. The dome and fiberglass ring will comprise my hatch. The dome is 25mm thick and 500mm OD. I'm envisaging I will embed it half way into a ring that is 50mm wide and 25mm high. The ring has a theoretical crush depth of 4000ft(1,768psi) The dome (if it was cast wich its not) would have a crush depth of 3233ft. I have the option of leaving a small portion of the flange on to key it into the fibreglass. The epoxy fibreglass is about 25% stronger than the acrylic. I'm designing everything with a crush depth of 2000ft + but will be happy with a 200ft operating depth.
Any thoughts -reservations - comments would be appreciated.
Thanks, regards Alan