RE: [PSUBS-MAILIST] Solo update pictures

["Alec Smyth" <Asmyth@changepoint.com>]

Is there a particular reason there are holes in the stiffeners?

AS: Yes, two reasons in fact. I put eyebolts through the holes during
the process of forcing the stiffeners into the hull, and second they're
handy for passing cables or tubes along while keeping them a little
better protected. But the high-amp cables shown in the picture of course
are too thick for the holes.


On StbdXpanel.jpg, is the red light on top a safety light? By that I
mean
that it runs independently of the main power, so that if power goes
there's
still some light - like an "exit" sign inside of a building.

AS: The red lights are on the top of both panels. They are simply
interior lighting that runs off the hotel battery -- little LED lights
that draw next to no power and of course could be turned off anyway. Red
because it makes the pupils contract less. I guess the "safety" will be
a flashlight.


PortXpanel.jpg, there are two controls that are labeled "Port" and
"Stbd".
What are they for? Are they the "throttles" for your motors?

AS: Yes. I recycled the OEM trolling motor speed controls because they
were nice pulse width modulation units, and as they came with the motors
I felt the specs were guaranteed to be well matched. I just machined
those handles for them because the originals jut out too far into the
cabin. However in hindsight I would not go this way if I were to do it
again. The controllers seem to work very well, but under the covers that
panel is way too dense. It has 3 layers of components in about 3 inches
of depth, and takes days to take apart. I was terribly pressed for
space, and a better solution would have been remotely controlled speed
controllers, placed in the stern.
 

I like the brackets you made for the power cables. Looks like the same
material that are used to hold the air tanks in place. What's that
material?

AS: I've made half the sub of that stuff, even the sub's wings and the
external chassis that carries the thrusters. It's ultra high molecular
weight polyethylene, or UHMW for short. It's cheap, mechanically strong
(similar to nylon), absorbs very little water, and is easy to machine.
As it's a nice white, you don't even need to paint it.


-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Alec Smyth
Sent: Monday, May 24, 2004 12:57 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Solo update pictures

Hi all,
 
I just posted some updated shots on moki
(http://www.prismnet.com/~moki/subfiles.html) showing how the interior
is
coming along. I'm keeping the viewport off as I find it easiest to get
in
and out through the bow that way. There are also many things that are
ready
to just bolt in, but which I've refrained from assembling because they
don't
let you move around. For example, there's the pilot's "tray", a sonar
just
inside the bow dome, and a big flood valve that goes on the roof in the
middle of the boat.
 
I posted these pictures with the description in the subject line rather
than
the body. As a result you can read the descriptions without having to
open
the "desc" file... and its empty anyway. The photos are in some
semblance of
logical order if you look at them from the bottom of the page up,
although I
did make one mistake along the way and posted the same picture twice.
 
One thing I'm far from proud of is the finish of the interior paint. You
can
see the drips and sags in the pictures. The reason is it was so
miserable
painting with epoxy inside a small pipe, even with a respirator, that I
pretty much flung the stuff at the wall as fast and hard as I could to
get
out of there. I got so much epoxy on myself, I could have used my head
as a
paintbrush were it not inside a plastic bag. The only thing worse was
sandblasting the inside of the small pipe first!
 
The last picture shows the PLC assembly sitting on the floor of the sub.
It
doesn't go there of course, it's just that it's a handy spot from which
to
connect it to my laptop and de-bug it through the window. Once debugged
and
mounted, the instrumentation and power circuits will be finished and
I'll be
on to the plumbing. I'm hoping to be finished by the end of the year,
but
have learned the margin of error in my schedule is huge, so who knows...
 
cheers,
 
Alec
 




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