Alan,
I am not wanting to dampen your enthusiasm but I think you need
to design the scrubber, battery switches, VBT internal spare battery, Coms,
valves, motor controllers, etc and allow for your 72 hours safety time and
make mockups of those to put into your foam model. Cliff Redus and Nuytco
designs are as small as you can get them. Even with fiberglass if you
cant make them out of steel /alumiinium then the design will have to be many
times thicker. i.e. cylindrical / conical / spherical designs are also
going to be best for fiberglass as well. Too small a personal space makes
air control too sensitive. Have you considered all this? Deepworker is about
as space conscious as you can get. Try and talk to Cliff. If the
space is too small then you will end up having to add a lot of floatation. Just
my penny’s worth. Hugh
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Alan James
Sent: Monday, 31 May 2010 8:40 a.m.
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] through hull reinforcement
Brian,
the hull is similar to Graham Hawkes "Aviator" wich was made out of
cast aluminum.
I'm
trying to make this as small as possible so that I have the convenience of
launching it off
the
beach etc. The shape is too complex for me to make out of steel.
I'm
designing this using a simple pressure program & a large block of
polystyrene that I've carved out
to
fit me & the subs internal componentry. once finalized I can contour the
polystyrene exterior to within
.5"
of the interior & just fiberglass over the outside.
The
small dimentions make it more suitable for using fiberglass. Mostly I'll be
about .5" thick (apart from reinforcements)
&
this will give me a 1000 ft crush depth for an operating depth of about 250ft.
However this will be confirmed
once
my final design is analyzed. The composite engineering program will also come
up with a laminate lay up plan.
-----
Original Message -----
Sent: Monday, May 31, 2010
1:07 AM
Subject: RE: [PSUBS-MAILIST]
through hull reinforcement
Why are you making it out of fiberglass?
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Alan James
Sent: Sunday, May 30, 2010 1:00 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] through hull reinforcement
I
need to design the reinforcement of the area around my hatch seat.
I've
read that with through hulls a general rule is you replace as much material as
has been removed
My
sub is small & is being made of fiberglass. At this stage I'm just trying
to get in the ballpark with
my
design calculations, as I intend to take take my drawings to a composite
engineer & get them
analysed
& corrected where necessary.
Would
the reinforcement be better on the inside of the hull, the outside, or divided
evenly on both sides.???
P.S.
To European & South African psubbers. NewZealand hot favourites for the
world cup.
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 5156 (20100530) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com