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Old 06-19-17, 03:40 AM   #1
schurem
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Default Question Re. SSN 688 model

Hey guys, I am looking at my beautiful boat, the USS Olympia and I was wondering about two little details on her model. What are the coppery shiny surfaces on her back? Are they windows of some kind?
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Old 06-19-17, 10:12 AM   #2
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I, too, have wondered what these things are. I do not think they are windows.
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Old 06-19-17, 12:27 PM   #3
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Only iranian subs have windows and screen doors...
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Old 06-19-17, 12:39 PM   #4
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Russians have them too:


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Old 06-19-17, 12:43 PM   #5
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Yes, those windows are outside the pressure hull, though. The "ones on American subs" that we're talking about wouldn't be.
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Old 06-19-17, 12:46 PM   #6
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Yeah, I don't think they're windows too. What's strange is that I couldn't find any RL pictures of those things (at least not on 688 class)

EDIT.

Just found this picture:
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Old 06-19-17, 01:04 PM   #7
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Quote:
Originally Posted by PL_Harpoon View Post
Yeah, I don't think they're windows too. What's strange is that I couldn't find any RL pictures of those things (at least not on 688 class)

EDIT.

Just found this picture:
Good find! I was curious to find out about the zinc plates.
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Old 06-19-17, 01:14 PM   #8
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Good find, indeed!
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Old 06-19-17, 07:00 PM   #9
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Are you talking about the sacrificial zinc anodes near the screw? They are there to prevent the brass from literally being eaten by the seawater.
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Old 06-19-17, 10:48 PM   #10
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Originally Posted by The Bandit View Post
Are you talking about the sacrificial zinc anodes near the screw? They are there to prevent the brass from literally being eaten by the seawater.
Interesting tidbit of info...thanks. had no idea that was even an issue, let alone the fix.
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Old 06-20-17, 10:43 AM   #11
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Sacrificial zinc anodes are almost universal on all boats with metal in contact with the water. It focuses corrosion on the zincs.
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Old 06-21-17, 01:22 AM   #12
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I am fascinated by the zinc plates. How exactly does this work?

Does it change the chemistry of the water? How does this work while the sub is moving and water is constantly being swept away?

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Old 06-21-17, 08:02 AM   #13
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Colloquially knows as 'Zincs'

Further reading
http://www.boatsafe.com/nauticalknowhow/012000tip3.htm
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