Re: [PSUBS-MAILIST] 1402 conning tower

[Steve McQueen <psub101@iquest.net>]

Great additional info.  Thanks, I will add it to my reference binder.  I'll see
you at the convention I assume...

Steve

Quoting vbra676539@aol.com:

> Steve,
>
> I think you will find that the shiny hatch mating surface is, in fact, a
> monel cladding layer on A516. That was the standard on all Perry mating
> surfaces, as monel was more ding resistent and didn't give you any stress
> corrosion issues. It was probably cheaper at the time, too, which was always
> a consideration. We had one of those big old fashioned rotary tables in the
> weld shop that could do submerged arc, wire-fed cladding. And, as a side
> note, the narrow 6-window conning towers had two hatch dogs, same as the
> bigger ones (28"OD).
>
> There is a huge operational difference between the 6 and 8 window conning
> tower. The big one is enormous by comparison, and gives a lot better viz. And
> I mean a LOT. You might not think it would make that much difference, but it
> does. The PC-14s used the?smaller one in a 42" hull, but the other two built
> to that size (PC-8 and PS-2) both used the 8-window unit.Also, the 8 windows
> were flush outside with their mounting flange bolts inside the hull (long
> bolts running down through the reinforcement collar.
>
> One other side note for accuracy:?PC-15 and the two PC-16 also used the
> 6-window unit. The former was specified by Vickers, the latter pair were due
> to design constraints on the highly stressed HY-100 hulls (which were only
> 1/2" thick, as I?recall--that HY-100 is STRONG stuff!!!).?
>
> All conns were bolt ons for a couple of reasons. First of all, you could
> lower the sub's profile in short order if necessary for shipping, and
> secondly, because you could build the conning towers on the bench, do all the
> machining on the floor tools, and only had to worry about one mating surface
> in the hull.
>
> Production was the deal. You have to remember that when Perry was in its
> prime, we'd have one to three subs under construction, a bell or two, and
> maybe another half dozen major pieces to a decompression/saturation system,
> including a whole section of the mechanical shop to bend tubing and build
> control panels and the like.
> ?
> It was a very busy place. Great fun, too.
> Vance
>





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