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Joe,
Wow....those are great design
elements......something like I was thinking....but with a double stepped
sail.
Could I ask what software you used to do the
drawings........
Thanks for the websites....I know there is much
reading to be done. That is the reason I put in the header my research was not
thorough.
I noticed your design seems to revolve around
a propane tank. I think that is a great idea....
How large will the finished design be?
I will help in any way that I can. The problem with
electronics......sometimes it takes more than one try to get what you are
looking for. The first try may work....but it hardly ever works exactly like you
want.(My experience)
I do have a concern about you design. (Please
remember I'm not versed with much submarine knowledge) I'm worried about your
thruster angles. To use the thrusters efficiently they would have to be pretty
well matched to do a coordinated hover turn. (jump from sea floor spin 180
degree and set back down) I don't think it is a
danger, just could be very frustrating. Can I ask why you didn't orient them
vertically and horizontally? Or why they are not at more of a vertical
angle?
With the current thruster angles....the controls
should be microcontroller based. It would be able to balance the
thrust between the 4 much faster and more even than you could
manually.This is provided the shaft drag (seals) on each motor are relatively
close.
James Long
Owner/Designer
Lil Brother LLC (Instrument Division)
----- Original Message -----
Sent: Saturday, July 21, 2007 8:03
AM
Subject: RE: [PSUBS-MAILIST] Some
thoughts on construction (I'm new so my research is not that thorough)
James,
".... I know totally encapsulating(
mostly.....the top hatch could never be totally surrounded) the crew
compartment within a ballast area...."
This is one of several viable
design considerations for soft tanks as specified by the text "Concepts
in Submarine Design", (highly recommended). It also happens to
be my choice for my own
design...http://www.frappr.com/?a=viewphoto&id=269116&pid=7063561
My suggestion for someone new, is to
read...read...read and then...read again. Did I mention read! :)
Besides the online Busby manual on the PSUBS web
site, I highly recommend and have found a gold mine of information in the
NAVPERS fleet boat
manuals...http://www.maritime.org/fleetsub/index.htm
As you are an electronics expert, perhaps I may
ask you a thing or two regarding systems integration when the time comes...not
quite yet as I am far from it at this point.
Joe
From: "Lil Brother LLC"
<lil_brother_llc@bellsouth.net>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: [PSUBS-MAILIST]
Some thoughts on construction (I'm new so my research is not that
thorough)
Date: Fri, 20 Jul 2007 17:05:24
-0500
>First I would like to thank everyone for a warm welcome. It
is nice
>to see a group of people that openly accepts the new guy to
the
>group.
>
>I have a question or two that can be
broken up into various
>departments:
>
>1. If the ballast
tanks were to totally surround the crew
>compartment, could the
ballast area be used structurally?
>
> I
mean if the air were purged, then the ballast area totally
>sealed
(with valves). Would this enhance the structure to help with
>the
pressure at depth?
>
> I figure since
this area would be totally filled with water
>(which doesn't compress
easily) it would add pressure resistance of
>the hull. (I'm only
guessing at this......so anyone could point out
>the error
in my view)
>
> I
know totally encapsulating( mostly.....the top hatch could
>never be
totally surrounded) the crew compartment within a ballast
>area would
be a major pain, and would be hard to up keep over a long
> period of time, but it may be worth the
while if the design is
>possible.
>
>2. I've noticed a
very strange item on the X300( nice fiberglass
>single place, dolphin
shaped sub) aft end. I'm very curious what the
>item is. I would also
like to know what type of propulsion the sub
>uses.
>
>3.
Are there any electronic valves out there that are pressure rated
>for our uses. I would like some companies to checkout to see if I
>can use them for ballast control.
>
>4. What is the
typical way of actuating bow and stern control
>planes?
>
>Any other things you would like to point
out.....would be
>appreciated. I do not have any materials to read
regarding the
>design and construction of a sub. My area is very
rural and the
>library is much to be
desired.
>
>
>James Long
>Owner/Designer
>Lil
Brother LLC (Instrument
Division)
>
>
>
>
>
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