[PSUBS-MAILIST] bor-silicat glas - SHOTT spheres

[AndrePevestorf@aol.com]

Hi,

Carsten yust told me that the problem with the SHOTT half spheres I mentioned before are made from BS glas. And such glas is not allowed for subs. It´s to easy to destroy with one hammer pitch ....
(is this the right word if I use a hammer ?  What are the common words for the most common tools..?)
BS glas can wonderfull withstand a equal pressure but this stuff is too brittle...
Damn !!! At the same time he told me that you can get it for app. 150 EURO (diameter 43cm)

I think over about to cover the glas with a second (thin and floated) acrylic hull....but what should I do if somethink drops from the inner side .... in the case I´m out of balance or what ever ....

too risk ????

A.