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I looked at how to seal the flat plexi windows, and settled on the "Sika"
way, first because it doesn't require extra machining of O ring grooves, and it
just seems that a larger sealing surface is not as dependant on accuracy.
With the 3 inch thick plexi disk, and a 2 inch landing flange, there's 5
inches of sika gasket that the water has to get through to reach the inside of
the hull.
With an O ring, there's only about 1/4 inch of seal, where the O ring
actually contacts the plexi disk.
The bad thing about this is I'm guessing there's no way you're gonna get
that disk out of there and save it if you wanted to remove it for some reason.
Pretty much guaranteed the disk will be destroyed getting it out.
I'm thinking the absolute best way is to use conical disks seated in sika
in a matching conical seat, but that's gotta be pretty expensive to make
something like that. I'm no machinist so anything that needs machining must be
hired out. Having a small check book means designing things as simple as
possible. Frank D. A Good Credit Score is 700 or Above. See yours in just 2 easy steps! |