[PSUBS-MAILIST] Removable tru hulls

[Pete Niedermayr via Personal_Submersibles]

Does this relate to viewports on the hull ( cylinder)? What should I watch out for in my designing ?

Pete
--------------------------------------------
On Fri, 1/16/15, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Removable tru hulls
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Friday, January 16, 2015, 9:39 AM
 
 Just for
 everyone else, what we are talking about here is not a
 penetrator but a removable bulkhead into which you can screw
 penetrators. What Snoopy has on her stern endcap, which is
 on the project page. Scott, these should go on the head
 itself, but as Vance mentioned avoid the knuckle (the part
 where the head has maximum curvature). I wanted to add to
 that you should not put these in the cylindrical portion of
 the hull. The bulkhead seats are beefy, but even so if you
 weld them into the cylinder the weld tension will bend them
 out of plane and they will no longer offer a flat seat. Its
 hard to explain in an email, but the reason this happens is,
 when you weld them into the cylinder, the weld itself is not
 on a flat plane as it goes around the insert, it is curved.
 If you put them into the endcaps, the weld is in almost the
 same plane all the way around and the insert will not
 distort.
 Locating smaller
 through-hulls (like one or two inch diameter) on the
 cylinder does not present this problem, but the big ones
 do.
 
 Best,
 Alec
 On Fri, Jan 16, 2015 at
 9:00 AM, swaters at waters-ks.com
 via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 I am putting two
 removeable tru hulls in Trustworthy (same as Alec) for my
 manipulator arms. I want to put them close to the front veiw
 port of the sub. I know if I get to close to the front veiw
 port it hurts the structure. How close can I get to it and
 still not hurt the
 structure?Thanks,Scott
 Waters
 
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 Cellular® Smartphone
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