<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><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-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1419969736535_18699"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" 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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">>
To: <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="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 rel="nofollow" shape="rect" target="_blank" href="callto:0800">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">>
_______________________________________________<br clear="none">>
Personal_Submersibles mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none">>
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">>
<br clear="none">> <br clear="none">>
_______________________________________________<br clear="none">>
Personal_Submersibles mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none">>
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">>
<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">>
_______________________________________________<br clear="none">>
Personal_Submersibles mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none">>
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">>
<br clear="none">> <br clear="none">> <br clear="none">> <br clear="none">> -----Inline Attachment
Follows-----<br clear="none">> <br clear="none">>
_______________________________________________<br clear="none">>
Personal_Submersibles mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none">>
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">>
<br clear="none">> <br clear="none">>
_______________________________________________<br clear="none">>
Personal_Submersibles mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none">>
<a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">>
<br clear="none"><font face="Courier New" size="2"> </font></div></div></div><br><div class="yqt2628051184" id="yqtfd00505">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></body></html>