<div dir="ltr">Thanks Jon, that's what I thought you were referring too but just wanted to clarify it as you had said 525 feet and I could have sworn that the captain had said to test it unmanned at 600 feet for one hour so I am confused as that's more than the ABS calcs of 1.5? Dan Hycroft built a 350 and tested his to 550' as that's the deepest hole he could find in the lake he tested in. James, you just built one, what did you test your's at?<div><br></div><div>Rick</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 18, 2020 at 6:18 PM Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div>Theoretical crush depth.</div>
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<div>On 6/18/2020 7:20 PM, Rick Patton via
Personal_Submersibles wrote:<br>
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<div dir="ltr">Jon,
<div>Are you talking about test or crush depth on the 350? </div>
<div>Rick</div>
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<div dir="ltr" class="gmail_attr">On Thu, Jun 18, 2020 at 2:50
AM Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>>
wrote:<br>
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<div>I ran the numbers again in the calculator and got the
same numbers. If I change the usage factor to 1.0 then I
get 884 feet. I suppose when trying to ascertain a
theoretical crush depth a usage factor of 1.0 would be
acceptable in the calculator. It's been my understanding
that ABS, Lloyds, etc, look for a safety factor of about
1.5 which would put the 350 at 525 feet. That may explain
the 600 foot test depth you mentioned, but even so, my
opinion is that's overkill.</div>
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<div>Jon<br>
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