[PSUBS-MAILIST] K-600

[Jon Wallace]

That must be due in large part to whatever is requested by the builder.  
I believe ABS requires a sub only sustain 1.25 times the pressure of the 
requested rating however George appeared to feel better with a larger 
safety margin, 2x (+ or -).  If you run the numbers on the K350 for 
example, you'll see that it theoretically (by the numbers) survives to 
800 feet or so.

Jon


On 10/24/2013 10:38 AM, vbra676539 at aol.com wrote:
> 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.
> Vance
>

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