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Re: [PSUBS-MAILIST] Fiberglass



Joe;  (who's Marsee?)

In your original message you mentioned "fiberglass structural sections (tubes,
I-beams)".  I know I've seen things like that, but I am not familiar with
suppliers.  I do know some yacht manufacturers were starting with styrofoam for
stingers, lighter and cheaper, and the atrength was in the fiberglass laid over
them and bonded to the hull.

As for " Rough up the surfaces and slather with resin?"  there's a little more
to it than that.  For one thing fiberglass does not go around sharp corners too
well.  They are generally rounded off (outside corners) or filled in with a 45
degree agle piece (inside corners).  There are many good books on working with
fiberglass, even in libraries for starters.  There are also many experienced
people in most areas where there are marinas and boats.

One area I am not knowledgeable about is what is required for certification.
There may be a requirement for metal framing or something.  There should be
enough  people on the P-subs list who can help with that end of it.  I asked a
"newbie" question a few weeks ago about using Ferro Cement for a sub hull.  The
responses indicated that while it might work the problem would be with
certification. The same could be true for fiberglass structural sections.

Dan

P.S. What general area are you in - I'm on the bayshore of New Jersey, USA
(south of Staten Island)




"Marsee Skidmore" <heyred@email.msn.com> on 01/16/2000 01:14:02 PM

Please respond to personal_submersibles@psubs.org

To:   personal_submersibles@psubs.org
cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

Subject:  Re: [PSUBS-MAILIST] Fiberglass



Yes, that's just the kind of structure I'm talking about. Does somebody make 4 x
8 sheets of fiberglass? Much snottier to work with than plywood, but solves the
problem. How would you go about bonding prefabricated fiberglass structures?
Rough up the surfaces and slather with resin? Slap in an extra mat or two?
Thanks. - Joe
  ----- Original Message -----
  From: Dan J. Rice
  To: personal_submersibles@psubs.org
  Sent: Saturday, January 15, 2000 9:39 AM
  Subject: Re: [PSUBS-MAILIST] Fiberglass




  I used to work for a yacht builder, 29' to 41' cabin cruisers.  They used
  plywood stringers and cross pieces inside the laid up hull (which was in a
  mold).  They fiberglassed over the plywood and the result was very strong, for
  that application. As for the pressures at 300 meters I think starting with
wood
  might not be the best, but if you start with fiberglass or something else
  fiberglass would bond to, to frame it out, fiberglass layers could be added
for
  strength and to attach the frame to the hull.

  Dan




  "Marsee Skidmore" <heyred@email.msn.com> on 01/15/2000 12:19:45 PM

  Please respond to personal_submersibles@psubs.org

  To:   "Psubs" <Personal_Submersibles@psubs.org>
  cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

  Subject:  [PSUBS-MAILIST] Fiberglass



  Gentlemen,

  I've recently been pondering my fiberglass exoskeleton. Since I'm diving to
300
  meters, I don't want to use wood for substructure. Can I glass over aluminum?
  Would fiberglass structural sections (tubes, I-beams) work? How would you
build
  a 30 foot fiberglass cabin cruiser hull without wood?

  Thanks,

  Joe
Yes, that's just the kind of structure I'm talking about. Does somebody make 4 x 8 sheets of fiberglass? Much snottier to work with than plywood, but solves the problem. How would you go about bonding prefabricated fiberglass structures? Rough up the surfaces and slather with resin? Slap in an extra mat or two? Thanks. - Joe
----- Original Message -----
From: Dan J. Rice
To: personal_submersibles@psubs.org
Sent: Saturday, January 15, 2000 9:39 AM
Subject: Re: [PSUBS-MAILIST] Fiberglass



I used to work for a yacht builder, 29' to 41' cabin cruisers.  They used
plywood stringers and cross pieces inside the laid up hull (which was in a
mold).  They fiberglassed over the plywood and the result was very strong, for
that application. As for the pressures at 300 meters I think starting with wood
might not be the best, but if you start with fiberglass or something else
fiberglass would bond to, to frame it out, fiberglass layers could be added for
strength and to attach the frame to the hull.

Dan




"Marsee Skidmore" <heyred@email.msn.com> on 01/15/2000 12:19:45 PM

Please respond to personal_submersibles@psubs.org

To:   "Psubs" <Personal_Submersibles@psubs.org>
cc:    (bcc: Dan J. Rice/EST/Sherwin-Williams)

Subject:  [PSUBS-MAILIST] Fiberglass



Gentlemen,

I've recently been pondering my fiberglass exoskeleton. Since I'm diving to 300
meters, I don't want to use wood for substructure. Can I glass over aluminum?
Would fiberglass structural sections (tubes, I-beams) work? How would you build
a 30 foot fiberglass cabin cruiser hull without wood?

Thanks,

Joe