Rick:
A 6 foot ABS certified view port starts at right around $100,000 for a depth rating of 300 feet. And it would be about 2.5 inches thick. Acrylic materials are bought and sold by the pound plus machining.
Dave Banks
Rick and Marcia <empiricus@telus.net> wrote:
Phil - thanks for the feedback!
I'm at the point where I have to decide whether to include room for the
family or not. A pressure vessel would protect the kids from potential
barotrauma, but, the necessity for pressure vessel testing is yet another
impediment in a very busy Dad's schedule.
If I want the family to have a great view, but avoid the headaches that you
alluded to, I just may go with the ambient dry pontoon boat [see my MOKI
sketch]. I'll need loads of bottles to compensate the cabin, and limit the
family to less than one atm. over a shallow bottom [at least while they're
still growing].
Except for the pressure vessel aspect, I'll adopt your suggestions regarding
systems testing.
BTW, I'm thinking of launching at Jericho and doing the tests just inside
the dolphins at Spanish Banks. The water seems nice and clear,
little
current, and if I mess up, the tide will ebb and I can yank the thing off
the sand.
Any thoughts on that area? Where did you field test DW? Similar reasons?
Warm regards,
Rick Lucertini
----- Original Message -----
From: "Phil Nuytten"
To:
Sent: Wednesday, February 23, 2005 7:57 AM
Subject: Re: [PSUBS-MAILIST] acrylic viewport thickness
> Hi, Rick!
> Just one run to test depth (unmanned)is required - then a manned
> function test ( demonstarete all functions - thrusters, life-support,
> etc.,) -then a shallow test to demonstrate drop weight, hull separation (
> in our DW case). These tests are done in our pressure chamber, except the
> shallow function test. If these are done at sea, then the manned pressure
> test and the shallow function test can be combined. On a new design, we
do
> hull strain-gauging also.
All of these tests are witnessed by
Lloyds,ABS.or
> DNV surveyor and are the final paperwork for certification. The prelim
> starts with engineered hull design, thrrough materials stamping, charpy
> test, weld Xrays, roundness gauging, and on and on - pain in the ass - but
> neccessary for commercial build.
> Phil Nuytten
>
>
>
>
>
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