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Hi, (any savy sub manman), Busby
recomends a ratio of 1.5 for the maximum viewport opening to the minimun
viewport opening. So on my viewports of minimum opening of 4"dia
that would give a maximum opening of 6"dia , which would make the seat
that the viewport sits in 1" on each side of the circle. I know that
you're suppose to have 100% of the material you take out of the hull replaced
with the same type of grade steel but that doesn't tell you exactly how to shape
your viewport ring. I'm going with 5/8" thick where the
retaining ring bolts onto (7.25"dia) and then the bottom portion would
come out to that 4" dimension. How much meat do I need on that
bottom portion between the inside viewport plane and the point where the
viewport ring comes furthest inside the sub? I need a
picture!
Brian
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