[PSUBS-MAILIST] External K250 stiffeners?

Thu Sep 7 16:09:04 EDT 2017

 Hmmm, I am not sure if I would do external stiffeners if building from scratch.   External stiffeners require full penetration welds all the way around.  If your building from scratch, you would simply increase the diameter to achieve the space requirement.  External stiffeners on a sub means you need cowling.  Gamma has two rings inside that are solid 1 inch thick and they are not in the way at all but the hull is 1\2 inch and 41 inch ID.  That 41 inch ID is the key.Hank
    On Thursday, September 7, 2017, 1:10:18 PM MDT, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 I would definitely put the stiffening rings on the outside if I was building from scratch.  I am trying to maximize the interior space of my K-250 as I build out the internals and if I could change that it would be significant.

Thanks,
Steve

---- irox via Personal_Submersibles <personal_submersibles at psubs.org> wrote: 
> Hi
> 
> keeping the K250 stiffen questions momentum going.
> 
> I'm restore-modding a early K250 (more like the last of VAST MK3s sold as a K250 after VAST and Kittredge parted ways).  One change I'm considering fitting external stiffeners to replace the internal stiffing/ballast tank structure.
> 
> Also, if I was building from scratch I would be making the same consideration.
> 
> Anybody else thinking about this or have thoughts about this?
> 
> Thanks,
>  Ian.
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