Re: [PSUBS-MAILIST] Through Hull Distortion

[emile@airesearch.nl]

James,

I expected the problem and chose a size for the mech. pen. where I had a
reamer availeble (16 mm)
It was just 0,1-0,2 mm so reaming worked well.

succes, Emile

> Hi All,
>
> Yet another problem for the Guernsey submarine construction team (me).
>
> I sort of knew this was going to happen, but im not sure how to fix it.
>
> Ive welded in all of the through hulls for the battery pods, which are
> also the electrical penetrators.  I machined the UHMWPE inserts to a high
> tollerance, so they were almost a press fit into the shafts.
>
> Anyway, after welding, they dont fit.  What was once a perfect fit is now
> not.
>
> The question is do i put a hand reamer down to try and open it up a bit,
> or put the inserts back on the lathe and take a thin cut off them?
>
> I suppose this is going to happen with all the mechanical through hulls?
> Im particually worried about the motor rotating through hulls as they are
> very precicely made.  The others (such as drop weights etc) i can modify
> the shaft.
>
> Kind regards
> James
>
>





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