[PSUBS-MAILIST] Acrylic cylinder viewport

[Raphael SOULIAC via Personal_Submersibles]

Hey guys, i'm currently in the process of designing a little deepworker
style sub and i'm wondering if the benefits of a cylindrical acrylic
viewport (higher freeboard, better view, steel hatch with vents) are worth
the inconvenients (more wheight on top, price, ...).

PS: Yes i know it will be very smililar to hank pronk's project with a
cylindrical viewport.

Raphael
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