The software is Rhinomarine, (rhino3d.com).
No propane tank,....same as K boats, rolled ASTM 516 steel.
Length is 27' overall, pressure hull diameter 42", weight 11,500 lbs, give
or take...Accurate weight and balance table yet to be done, I will do this
after I hash out the final concept. The general specifications of PC-5C,
is the model. http://busby.psubs.org/html/page-176.html
".....With the
current thruster angles....the controls should be microcontroller
based......"
Ah, yes...the thrusters! :) , and I just learned something from
you...more on that in a moment. Why the 45 degree orientation you
ask?.....several (not yet chiseled in granite),
reasons.
1- I need that orientation up forward, if I hope to have any kind of
forward view-port. As it is, the design requires significant camera
coverage.
2- This orientation with proper controllers as you note, can and has been
successfully used in opposition and, in concert for spectacular
maneuverability, up / down, left / right. Also, this boat will be heavy so,
the thrusters in opposition to spin her about the vertical axis in her own
Length, with a snappy response......can only be a plus.
3- The last reason, is mimicking the NR-1 in as many ways
possible.
"......This is
provided the shaft drag (seals) on each motor are relatively
close......."
Now this
is the little nugget I just got from you. Minute differences in shaft seal
drag and, how that might effect these little guys controller wise, did not
occur to me. It just so happens, that with my newly planned home machine shop,
that I recently decided the four maneuvering thrusters would be using magnetic
couplers. The two main motors aft, are likely to remain shafts. All of these,
thrusters and the main motors, will be built before the sub
is.
I had
decided that six rotating shafts, is asking too much from the odds maker. But
now that you mentioned that, I suspect the magnetic couplers should be in a
better position to be clones of one another.
Thanks
James, may I suggest that you post links for appropriate suppliers regarding
motor controller electronics on the PSUB web site.
Joe
From: "Lil
Brother LLC" <lil_brother_llc@bellsouth.net>
Reply-To:
personal_submersibles@psubs.org
To:
<personal_submersibles@psubs.org>
Subject: Re:
[PSUBS-MAILIST] Some thoughts on construction (I'm new so my research is not
that thorough)
Date: Sat, 21 Jul 2007 14:52:30
-0500
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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