|
Forget it
Brent !
Brian
Hello
Joe,
The front and rear MBT's can easily be
enlarged with out changing the external look of the sub. Lighter yet stronger
modern materials can be used in the conning tower. Also since there would be
no need for the WWII very heavy equipment inside that would change a lot as
well.
Even if you didn't
do that, the existing freeboard height the Biber's have is more then a lot of
PSUB's I've seen, including mine. Look at the last picture on this
link.
http://www.channel4.com/science/microsites/S/salvage_squad/machines/sub/index.html#4
Small
saddle tanks like on some of the Seehunds, could be added as well, if one
wanted the added surface
stability.
The torpedo battery
pods, could also be lowered a few inches, and change the height of the main
pressure hull indents that receive them to reflect that change, to gain a
better metacentric height. This wouldn't really change the look enough for
most to notice.
Brent
From: joeperkel@hotmail.com
To: personal_submersibles@psubs.org
Subject:
RE: [PSUBS-MAILIST] Restoring a Biber (or Beaver) midget submarine
Date:
Tue, 12 Aug 2008 10:56:23 +0000
Hi Brent,
The issue with those two in particular is how they lie in the
water with minuscule reserve buoyancy. Not conducive to safe open water ops
any time the hatch is opened. Assuming historical accuracy in a replica, no
amount of modernization would change that.
Assuming a historically
accurate Biber, .....well now gasoline in a sub? Replace with the tiny Yanmar
and you still have a low lying narrow beam ship.
Best then to up the
size to what Kraka became. Not to mention UC3.
Thanks
Brent!
Joe
From: brenthartwig@hotmail.com
To:
personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Restoring a
Biber (or Beaver) midget submarine
Date: Mon, 11 Aug 2008 23:05:55
-0700
Greetings Joe,
I've
been meaning to tell you how much I enjoyed looking at you new CAD work on
your float plane replica. You could make a very nice scaled down RC plane off
those assembly models.
With
regards to making a Biber and/or Seehund looking PSUB, if a person really
wanted to design and construct one, I don't see any massive road blocks in
making a safe one. We have so many material, processes, and equipment options
now days. They are a pretty sleek hydrodynamic design when compared to many
PSUBs and they can be configured so many different ways internally. There
shape isn't really all that odd for a sub.
I don't think that not knowing
what the results of a weights and moments calcs, would be on ones first
configuration efforts, shouldn't be a reason to not even try. I see so many
guys with now successful PSUBS, that likely didn't do any real serious weights
and moments calcs on there PSUB having to place a lot of lead and other things
in different places when they first put there sub's in water to get them to
work as desired.
I would be
interested to know what percentage of PSUB's had proper professional weights
and moments calcs done on that subs design before it
was finished, and what percentage of those are now reasonably
functional subs. Ya I know, I'm a pain in the arz. I just
don't throw in the towel on ideas because I can't know for sure how
every thing will work out in the end design in
advance.
Yes a Biber
and/or Seehund PSUB look alike sub would likely be more work then a basic
modern PSUB design, and they might have some operational disadvantages when
compared to a given PSUB. But like we talk about from time to time, are subs
should be designed for what we want them to do. So in this case, we would want
them to look like really scary cool WWII German Midget subs, that also work
for a lot of different kinds of adventures. Then much later they
them selves would likely be in a museum for many more to enjoy. Mine however would be placed in my live aboard submarines living
room, as a fish tank for sharks. ;)'
A balanced
submarine has a midget sub attached on each
side.
Cheers,
Brent
Hartwig
From: joeperkel@hotmail.com
To: personal_submersibles@psubs.org
Subject:
RE: [PSUBS-MAILIST] Restoring a Biber (or Beaver) midget submarine
Date:
Mon, 11 Aug 2008 22:23:18 +0000
".......but found many
constraints and would have found more once he became involved with weight and
balance along with stability calculations......."
True, so true! I kept
putting off weight and balance calcs despite the software
capability.
More
than any other single source, I found Jay's input the most valuable in
remaining on course for a viable design.
A military replica PSUB is
possible, just look at Kraka for U-boat influences but, a Biber, or
Seehund (In my opinion) should be considered as museum display
candidates for the very reasons Jay points out.
The sea will never leave me. I am
building after all,...a seaplane but, as you can see, I still keep tabs on
what you guys are doing. I also found a way to dedicate my psub efforts on my
website http://sopwith-baby.com/Project_Genesis_II.html
Take care!
Joe
|