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<body link="#000000" vlink="#000000" alink="#000080" topmargin=0
leftmargin=0 marginwidth="0" marginheight="0"><font face="Courier New"
size=2>FEA (Finite Element Analysis) is a
comon way. <BR>We did it that way on Euronaut, Sgt.Peppers and the
Eurosub class
boats. <BR>But if you have not a friend familary with this - maybe
expensive. <BR>Ask students of a technical
university..</font> <BR><BR>This link shows a detail of the diver
exit hatch. <BR><A
href="http://www.euronaut.org/content/gfx/technic/3.jpg">http://www.euronaut.org/content/gfx/technic/3.jpg</A>
<BR><BR>Attachment is from Sgt.Peppers after installing the top
hatch and before the chamber pressure test. <BR>Conclusions was two more
bars in
the hatch. <BR>Boat survife the pressure test - with installed bars.
<BR><BR>vbr
Carsten<BR><BR>
<BR>"Alan James via Personal_Submersibles"
<personal_submersibles@psubs.org> schrieb:
<blockquote style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; PADDING-RIGHT: 0px; MARGIN-RIGHT: 0px">
<div style="FONT-SIZE: 16px; FONT-FAMILY: HelveticaNeue, Helvetica Neue,
Helvetica, Arial, Lucida Grande, sans-serif; COLOR: #000;
BACKGROUND-COLOR: #fff"
><div dir="ltr"
id="yui_3_16_0_1_1419969736535_18726"><span>Hank,</span></div><div
dir="ltr" id="yui_3_16_0_1_1419969736535_18728"><span
id="yui_3_16_0_1_1419969736535_18727">I know you have a phobia here, but
you could model it in a computer</span></div><div dir="ltr"
id="yui_3_16_0_1_1419969736535_18729"><span>if you bought a few
programs!</span></div><div dir="ltr"
id="yui_3_16_0_1_1419969736535_18731"><span
id="yui_3_16_0_1_1419969736535_18730">After one Canadian winter locked
inside for months, you'd probably start </span></div><div
dir="ltr"><span>enjoying it.</span></div><div dir="ltr"
id="yui_3_16_0_1_1419969736535_18732"><span>Alan</span></div><br> <div
style="FONT-SIZE: 16px; FONT-FAMILY: HelveticaNeue, Helvetica Neue,
Helvetica, Arial, Lucida Grande, sans-serif"
id="yui_3_16_0_1_1419969736535_18699"> <div style="FONT-SIZE: 16px;
FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida
Grande, sans-serif" id="yui_3_16_0_1_1419969736535_18698"> <div
dir="ltr" id="yui_3_16_0_1_1419969736535_18715"> <hr size="1"> <font
size="2" face="Arial" id="yui_3_16_0_1_1419969736535_18733"> <b><span
style="FONT-WEIGHT: bold"
>From:</span></b> "Carsten Standfuß" via Personal_Submersibles"
<personal_submersibles@psubs.org><br> <b><span style="FONT-WEIGHT:
bold">To:</span></b> Personal Submersibles General Discussion
<personal_submersibles@psubs.org> <br> <b><span
style="FONT-WEIGHT: bold">Sent:</span></b> Wednesday, December 31, 2014
8:08 AM<br> <b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re:
[PSUBS-MAILIST] model testing<br> </font> </div> <div
class="y_msg_container" id="yui_3_16_0_1_1419969736535_18697"><br><div
id="yiv9185248409"><div id="yui_3_16_0_1_1419969736535_18696"><font
face="Courier New" size="2"
id="yui_3_16_0_1_1419969736535_18734">If the
scale factor is 1:1 it shall
work.. :-0<br clear="none"></font><br clear="none"> vbr
Carsten<br clear="none"><div class="qtdSeparateBR"><br><br></div><div
class="yiv9185248409yqt2628051184" id="yiv9185248409yqtfd78906"><br
clear="none">"hank pronk via
Personal_Submersibles" <<A
href="mailto:personal_submersibles@psubs.org" shape=rect rel=nofollow
target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
schrieb:<br clear="none">> <br clear="none">> I am not looking for
drag comparisons, I am
looking for failure due to pressure comparisons. I though I read that
the Nekton subs were built as a model first to establish crush
depth.<br clear="none">> Hank
--------------------------------------------<br clear="none">>
On Mon, 12/29/14, Cliff Redus via Personal_Submersibles <<A
href="mailto:personal_submersibles@psubs.org" shape=rect rel=nofollow
target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
wrote:<br clear="none">> <br clear="none">> Subject: Re:
[PSUBS-MAILIST] model
testing<br clear="none">> To: "Personal Submersibles General
Discussion" <<A href="mailto:personal_submersibles@psubs.org"
shape=rect rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br
clear="none">>
Received: Monday, December 29, 2014, 3:06 PM<br clear="none">> <br
clear="none">>
Drag<br clear="none">> results between a model and full scale does
not
scale<br clear="none">> geometrically. You have to scale model
and full
scale off<br clear="none">> the dimensionless Reynolds
number.
Reynolds number<br clear="none">> scaling enables you to scale
results between
model and full<br clear="none">> scale using either a water tunnel
or air<br clear="none">>
tunnel.<br clear="none">> Cliff<br clear="none">> <br
clear="none">> <br clear="none">> <br clear="none">>
From: Alan James via<br clear="none">> Personal_Submersibles<br
clear="none">> <<A href="mailto:personal_submersibles@psubs.org"
shape=rect rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br
clear="none">>
<br clear="none">> To: Personal<br clear="none">> Submersibles
General Discussion<br clear="none">>
<<A href="mailto:personal_submersibles@psubs.org" shape=rect
rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
<br clear="none">> <br clear="none">> Sent: Monday,<br
clear="none">> December 29, 2014 1:55
PM<br clear="none">> Subject: Re:<br clear="none">>
[PSUBS-MAILIST] model testing<br clear="none">>
<br clear="none">> <br clear="none">> Hank,I just ran<br
clear="none">> a test on my pressure
program & you get the same crush<br clear="none">> depthon a<br
clear="none">> sphere
of A516-70 steel that is 1000mm diameter & 10mm<br clear="none">>
thick as
youdo on a<br clear="none">> sphere 100mm diameter & 1mm
thick.What I
am<br clear="none">> not sure of is if you can scale up the drag
results on
a<br clear="none">> model.If you<br clear="none">> have a scale
model that is 1/50th &
it takes X amount of<br clear="none">> force to push<br
clear="none">> it at
3<br clear="none">> knots, can you multiply X by 50 to get the
required<br clear="none">>
thrust?Alan<br clear="none">> <br clear="none">> <br
clear="none">> <br clear="none">> From: Brian
Cox via<br clear="none">> Personal_Submersibles<br clear="none">>
<<A href="mailto:personal_submersibles@psubs.org" shape=rect
rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br
clear="none">>
<br clear="none">> To: Personal<br clear="none">> Submersibles
General Discussion<br clear="none">>
<<A href="mailto:personal_submersibles@psubs.org" shape=rect
rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
<br clear="none">> <br clear="none">> Sent: Tuesday,<br
clear="none">> December 30, 2014 8:43
AM<br clear="none">> Subject: Re:<br clear="none">>
[PSUBS-MAILIST] model testing<br clear="none">>
<br clear="none">> <br clear="none">> Hank,<br
clear="none">> I would
say<br clear="none">> no. It would have to be so exact that it
would
be<br clear="none">> virtually impossible to extrapolate from the
small
model,<br clear="none">> and<br clear="none">> aside from that
I think there are other
engineering<br clear="none">> principles involved that would come
into play ,
Sean would<br clear="none">> be the person to ask ! I know
that it is done
in wave<br clear="none">> tanks and wind tunnels, but in those you
are looking
at<br clear="none">> laminar flow and such things, not structural
strength
so<br clear="none">> much. You might be able to get a rough
idea of how
it<br clear="none">> would start to collapse maybe. The larger
the model
the<br clear="none">> better I would think.<br clear="none">>
<br clear="none">> Brian<br clear="none">>
<br clear="none">> --- <A
href="mailto:personal_submersibles@psubs.org" shape=rect rel=nofollow
target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br
clear="none">>
wrote:<br clear="none">> <br clear="none">> From: hank pronk
via<br clear="none">>
Personal_Submersibles <<A
href="mailto:personal_submersibles@psubs.org" shape=rect rel=nofollow
target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br
clear="none">>
To: <A href="mailto:personal_submersibles@psubs.org" shape=rect
rel=nofollow target=_blank
ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br
clear="none">>
Subject: [PSUBS-MAILIST] model testing<br clear="none">> Date: Mon,
29 Dec 2014
10:52:46 -<A href="callto:0800" shape=rect rel=nofollow
target=_blank>0800</a><br clear="none">> <br clear="none">> Hi
all<br clear="none">> If you<br clear="none">> make a scale
model of a submarine in
complete detail. <br clear="none">> Scale the size and metal
thickness, is
it a reasonable<br clear="none">> representation of depth
capabilities when
pressure<br clear="none">> tested?<br clear="none">> Hank<br
clear="none">>
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