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Re: [PSUBS-MAILIST] Main Tanks Question



James,
 
I altered the mounting frame.  First I built a Styrofoam pattern then a mold then the finished part.  I didn't build the frame until I was fitting up the finished part.  Most of the frame modifications were to accommodate the big steel pot to contain the three head lights in the nose.  If you know how your going to alter the MBT I don't see why you can't build your main frame first and then weld on five or six mounting tabs when your mounting your tank.  You can touch then up with a brush. 
 
One note of caution. 
 
I discussed my MBT alterations with Kittredge before I built them.  He cautioned me to be careful enclosing to much of the bottom so I wouldn't find myself in a situation where the sub was nose or tail up like a buoy, with no way to vent the air from the upper MBT and no way to hold air in the lower MBT. 
 
I never tested this in practice.  But just in case, I added a few half inch holes to the most forward part of the forward MBT and the most aft part of the rear MBT.  In case I end up in that situation the trapped air can vent and I won't have to swim out, scuttling the sub in the process.   A K-350 may be stable enough that this wouldn't happen but I didn't want to chance it. 
 
Dan H.
----- Original Message -----
Sent: Friday, March 11, 2011 10:48 AM
Subject: [PSUBS-MAILIST] Main Tanks Question

Hi All.
 
Im finally at the stage where i am starting on my main tanks.  Ive decided just to stick with the ordinary ones shown on the plans, but i'd like to jazz them up a bit like Dan H has done as i think they look a lot better.
 
Question is:  For those of you who have "modified" K350 main tanks, did you make the framework as per the plans and adjust the tanks to fit, or make the tanks first, and modify the framework to fit the new shape.  I suspect the latter.  I was hoping to be able to get the metalwork complete and then get the sub painted.  If i have to make the tanks first, it will mean more time unpainted.  Anyway, any thoughts suggestions always welcome.

Many thanks
James