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[Rick Patton via Personal_Submersibles]

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?

Rick

On Thu, Jun 18, 2020 at 6:18 PM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>
> Theoretical crush depth.
>
>
> On 6/18/2020 7:20 PM, Rick Patton via Personal_Submersibles wrote:
>
> Jon,
> Are you talking about test or crush depth on the 350?
> Rick
>
> On Thu, Jun 18, 2020 at 2:50 AM Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>>
>> 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.
>>
>> Jon
>>
>>
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