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<div><font style="background-color: transparent;"> He told me the same thing about the 600. Too deep. I'm not surprised by the safety factor. Some Annapolis buddy of George's was a chief design guy for Navy subs and went over all the original calcs.</font></div>
<div>Vance</div>
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<div style="color: black; font-family: arial,helvetica; font-size: 10pt;">-----Original Message-----<br>
From: greg cottrell <jgcottrell2002@yahoo.com><br>
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br>
Sent: Thu, Oct 24, 2013 11:34 am<br>
Subject: Re: [PSUBS-MAILIST] K-600<br>
<br>
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<div style="right: auto; color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; background-color: transparent;">Vance,</div>
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<div class="ms__id5522" style="right: auto; color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; background-color: transparent;">The answer is that George did not assign depths to his own designs as deep as they would really go. </div>
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<div style="right: auto;">I once did some calcs on the K-250 with Cliff's <span id="misspell-1" style="right: auto;"><span style="right: auto;">spreadsheet</span></span> and was surprised to see that the estimated depth rating was over 500 ft. (I also found that the size and spacing of the frames was surprisingly good). When I mentioned this to George he said "Really? How did that happen?!!" But then went on to tell me that his target safety factor was more than<var id="yui-ie-cursor"></var> two to one. </div>
<div style="right: auto; color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 16px; font-style: normal; background-color: transparent;">I'm sure that if we run the numbers on the K-600 we will find that it could have been rated to go much deeper.</div>
<div style="right: auto;"> </div>
<div style="right: auto;"><span id="misspell-2" style="right: auto;"><span style="right: auto;">Incidentally,</span></span> George was not very comfortable selling plans for the 600 because he thought it was just too deep for the average Joe to be messing around with.</div>
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<div style="right: auto;">Greg</div>
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<font face="Arial" size="2"><b><span style="font-weight: bold;">From:</span></b> "<a href="mailto:vbra676539@aol.com">vbra676539@aol.com</a>" <<a href="mailto:vbra676539@aol.com">vbra676539@aol.com</a>><br>
<b><span style="font-weight: bold;">To:</span></b> <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br>
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, October 24, 2013 10:38 AM<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] K-600<br>
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<div><font style="background-color: transparent;">PC-8 has 3/8" wall thickness on the hull cylinder, the same as the 600, but was rated 200 feet deeper by ABS, even though it has a larger radius (21" as opposed to 18"). The ring stiffeners on the 8 are external and the conning tower larger. Makes you wonder what the deal is for figuring operating depth. Perry went to half inch for PS-2 which was the same boat but rated at 1000'. Hmmm.</font></div>
<div>Vance</div>
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<div></div>
<div style="color: black; font-family: arial, helvetica; font-size: 10pt;">-----Original Message-----<br>
From: greg cottrell <<a href="mailto:jgcottrell2002@yahoo.com">jgcottrell2002@yahoo.com</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Sent: Thu, Oct 24, 2013 10:24 am<br>
Subject: Re: [PSUBS-MAILIST] K-600<br>
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<div><span>I thought that George said they were .625" but I could be wrong.<var id="yiv1773716987yui-ie-cursor"></var></span><span></span></div>
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<font face="Arial" size="2"><b><span style="font-weight: bold;">From:</span></b> Jon Wallace <<a href="mailto:jon.wallace@yahoo.com" rel="nofollow">jon.wallace@yahoo.com</a>><br>
<b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" rel="nofollow">personal_submersibles@psubs.org</a>> <br>
<b><span style="font-weight: bold;">Sent:</span></b> Thursday, October 24, 2013 10:14 AM<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] K-600<br>
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It was an engineer hired by the company that commissioned and purchased the 600. His calculation requirements for the heads came out a little bit thicker than what George had calculated. I believe George spec'd .5 inch and the company's engineer spec'd .5625 inch.<br>
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On Thu, 10/24/13, greg cottrell <<a href="mailto:jgcottrell2002@yahoo.com" rel="nofollow">jgcottrell2002@yahoo.com</a>> wrote:<br>
<br>
Subject: Re: [PSUBS-MAILIST] K-600<br>
To: "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org" rel="nofollow">personal_submersibles@psubs.org</a>><br>
Date: Thursday, October 24, 2013, 9:25 AM<br>
<br>
George attributed the miscalculation in the weight<br>
of the 600 to
second guessing the thickness of the heads.<br>
His original design called for thinner heads but<br>
someone (can't remember who) that George respected<br>
suggested that they should be thicker. George used the<br>
thicker heads and then found that the sub wouldn't<br>
float. He had the hull lengthened by Bath Iron Works to get<br>
the needed buoyancy back. He<br>
said he was amazed at how fast they turned the job around- I<br>
think it was only a few days.<br>
<br>
Greg<br>
<br>
<br>
<br>
<br>
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