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Hi Hugh,
I have motor controllers, valves, O2 & CO2
monitors, O2 regulator, pressure gauge, compass,
etc etc. What I haven't sorted is the through hulls as I'm not certain of the hull
thickness yet.
The batteries are going either internal in a
tubular section out the back of the pod or
external depending on what the engineer thinks, as
this transition may be difficult in fiberglass.
I haven't designed the scrubber yet. I want to have
two small scrubbers for the reason you point
out, that in a small space the margins for error
with the life support system are less. They have a
designated space under my seat.
I have concentrated on buying all the componentry
so I can sit in my model with everything in it & know
for sure it's going to fit & I'm comfortable
enough. If not just dig out some more polystyrene.
Also there is nothing in my hull design that's not
cylindrical, conical or spherical.
Re the flotation; I'll be using inflatable pontoon
type ballasts wich will enable bigger ballasts without the
drag under water. Additionally I'm looking at an
acrylic sail like Emile has that can pivot back through
180 degrees &
sit behind the pod while submerged.
Lots of work but I'm further on than I was 2 years
ago.
Regards Alan
----- Original Message -----
Sent: Monday, May 31, 2010 9:27 AM
Subject: RE: [PSUBS-MAILIST] through hull
reinforcement
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.
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