[PSUBS-MAILIST] bolt on rings

[hank pronk via Personal_Submersibles]

Sean, I know we talked a bit about this idea before but I need a refresher.  Can I machine a hole in a heavy sphere and insert a hatch land\reinforcing ring assembly that bolts to the sphere.  It looks like Karl Stanley may have done that with his front dome.  This idea if feasible makes building a deep diver more realistic.  I am thinking  of trying this on my current sphere just to see if I can do it.  Better to screw up a cheap sphere first.  ;-)
Next question, when I look at the Deep Rover sub, it has two hemispherical domes coming together on a two sided land.  I am sure the land also gives the domes side support.  Why would this design not work with two heavy steel hemispherical domes.  I am talking 3 to 4 inches thick.   The  steel domes can easily be machined with a flat land and o-ring grooves.  The idea is to eliminate a very costly weld and it would be pretty darn nice to build with the top half of the hull removed.  Hank
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