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Re: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options



Dan,  Sounds reasonable, I'll have to get my basic list, and wish list together and see what types and sizes of connections I will need/want. Then see if I can fit them all in the main assembly of my boat.  I would just hate to have to cut into and weld on the hull down the road, if I can plan for most of it now.   I've been working on sub assemblies for my sub, and bit by bit the whole puzzle will start to come together. There are always adjustments when that happens of course.  
 
I can see one front head plate easily being used up just for five or more lights, a camera, and a video camera.  Then the other plate for pneumatic control of the mushroom vent and future grabber arm.  Having one of each side of the front head helps in balance some.  For the rear head I have the need for power to the two stern thrusters, and at least three lights, so I might get away with just one plate there centered on the head. I'm thinking I want to move the flood valve to a more forward local, since I plan to use it a fair bit for wet exit training.
 
I have not decided if I'll place a O2 tank in under the rear MBT like Alec did, or install two smaller ones just forward or aft of the conning tower basically like on Cliff's R300, but under a small standing platform.  At some point I would like to have a number of sonar units. At least one pointed forward, one back, one up, one down, one starboard, and one port.  So that's at least six small thru hulls I need to plan for. Then we have the communications system David and crew are working on.
 
Man is sounds like I need to just take a machine gun to the hull, and when the smoke clears, just weld in a thru hull over every bullet hole. ;)'
 
BH
----- Original Message -----
From: Dan H.
Sent: Wednesday, February 04, 2009 5:29 AM
Subject: Re: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options

Brent,
 
Some of the stuff you listed will always be needed to operate the sub.  For through hulls that will always be used, like MBT connections, there isn't any reason to run them through plates.  Just mount through hull fittings directly to the hull in places where they will be best located.  Only install the plate through hulls where you may use them for changeable stuff and future additions.  Why create stress areas, more welds, more O-rings and places to possibly leak where you don't need them?  Six is way to many.
 
Most likely one plate will do you, but I can see as many as three, one up front down low, one somewhere in the aft end cap and maybe another on top behind the conning tower.  All you really need to do is get through the hull.  You can run piping or wires outside the hull as needed too.
 
Dan H
----- Original Message -----
Sent: Tuesday, February 03, 2009 5:02 PM
Subject: FW: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options


Vance,  The Captain didn't remember installing the plate thru hull, but it might of been his install.  The two plate thru hulls I'm planning for the front head, are for lighting, a future manipulator, still and video cameras, sonar, air for filling the front MBT, pneumatic actuation of the mushroom vent, etc, etc..  So the one just forward of the conning tower, might be used for some instrumentation I want in front of the forward viewing area, some additional lighting, perhaps cameras, and a large light that I can rotate and change the angle of, sort of like a police light, by means of pneumatic or electric actuators, and a couple other future items. In all I'm thinking of installing six of these S201 type plate thru hulls. Two in each head, and two near the conning tower under small standing platforms much like seen on the Delta sub, but a bit higher to make room for the plate thru hull connections, and keep my feet dry.


Szybowski





To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options
Date: Sat, 31 Jan 2009 09:39:38 -0500
From: vbra676539@aol.com

As the sub was used extensively, I'd say somebody did some design work, possibly Captain Kittredge himself. It has that look. What would you use the front penetration for? If you are planning a manip or something that needs a dozen or so pens, I think that I'd consider putting it forward and down somewhere to get it closer to the source, and cut down somewhat on the tube bending.
Vance


-----Original Message-----
From: Brent Hartwig <brenthartwig@hotmail.com>
To: PSUBSorg <personal_submersibles@psubs.org>
Sent: Fri, 30 Jan 2009 8:00 pm
Subject: RE: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options



Vance,  I just added five additional pictures of the plate thru hull on my K-250.  Two show a interior view, and the others show some basic measurements I took some time back before I purchased the sub. I can get better measurements before I head south, and make up a CAD model and drawings for you.


http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Electrical%20Thru%20Hull%20Wiring/Large%20Plate%20Thru%20Hull%20on%20K-250%20%7C3118



Szybowski





From: brenthartwig@hotmail.com
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options
Date: Fri, 30 Jan 2009 17:00:23 -0800



Vance,  Having easy thru hull options is useful. I will be adding another plate thru hull assembly in front of the conning tower as well under a small standing platform.  I also want that same type of platform behind the conning tower.  That existing plate thru hull, looks like they just used a standard pipe flange and welded it in. My friend had SS ones like that he installs in his SS tanks I could use if I wished.  I don't have all the data here with me, but if I recall correctly the tube has a ID of 6 inches, and a wall thickness of 1/4".  The top plate is 5/16" thick and the flange is 3/8" thick.  The OD of the plate is 8 3/4".  I was planning or replacing the steel plate with a thicker 316 SS one.

I've now been thinking about cutting off the flange and installing a smaller diameter plate, and attach it internally sorta like the ones on the S201, but use welded on SS tabs instead of the SS retaining ring, to make it even easier and cheaper to fab up. This configuration might be the cheapest and easiest to make and install in the tube section or the heads.  Basically you just start with a cheap steel tube. I'm planning on making a CAD model shortly, so I can show you exactly what I'm thinking.


Regards,

Szybowski





To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options
Date: Fri, 30 Jan 2009 17:53:03 -0500
From: vbra676539@aol.com

Brent,

It looks like a pretty good way to get multiple connectors without having to chuck the sub up in a mill. How thick is that flange, and how thick the tubular penetration? Assuming they were an assembly, it seems like you might be able to install something like that without distorting the O-ring mating surface. Maybe I'd be tempted to repace the disc with a stainless piece, but hey, it's there, right? Run what you brung.

Vance



-----Original Message-----
From: Brent Hartwig <brenthartwig@hotmail.com>
To: PSUBSorg <personal_submersibles@psubs.org>
Sent: Fri, 30 Jan 2009 4:45 pm
Subject: RE: [PSUBS-MAILIST] Large Plate Multi Thru Hull Options

I had these pictures in a folder earlier, but Windows Live some how messed up the folder some time back in such a way so you couldn't view them, and I was not able to delete the folder.  So I've put them in a new folder for my electrical thru hull pictures.  You can see that thin plastic electrical thru hulls, and threaded holes in steel plate, is not the best way to go.


http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Electrical%20Thru%20Hull%20Wiring/Large%20Plate%20Thru%20Hull%20on%20K-250%20%7C3118


 
 

Szybowski