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 Author  Topic: Day Room Roof Connecting Plates
Steve Sobieralski

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Steve Sobieralski  Posted on: Jan 20, 2013 - 8:54am
The photo in the link below appears to show the clips:

http://www.williammaloney.com/Dad/WWII/MiltWWII/NavigatingTheLocks2/pages/06RearTorpedoCradle.htm

Steve Sobieralski

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David Waples

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of David Waples  Posted on: Jan 21, 2013 - 4:54am
Jeff,
Do we know what series of boats these appear on?
Dave

David Waples

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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Jan 21, 2013 - 7:55am
Nice Steve, thank you.

Dave, one drawing, which I used for my model, lists PT 103-196 & 314-343. Another lists PT 344-367, 372-383, 546-563, 486-545, 731-760, and 565-624.

The plates are the same on both drawings except for 2 sets are trimmed off 1 7/8" for turret clearance on the later drawing. The later drawing also shows radar mast rest pads in place of 2 sets, for a total of 8 sets as opposed to 10 used on the earlier boats. The outermost plate centers were about 9 1/4" in from the sides of the day room cabin trunk on both drawings (81" span to centers of outside plates). Spacing across the roof is equal on the early boats. The later ones varied, if you were looking at the top of the roof with the forward end up the spacing would be 9", 8 1/2", 9", (pad), 20", 8", (pad), 18", 8 1/2".

The plates were made from 0.064" thick aluminum alloy. They were 6" x 3", with a 1" lightening hole in the center. The "ears" had a 3/8" radius, the round sides were 1 1/2" radius.

TMI?



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David Waples

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of David Waples  Posted on: Jan 21, 2013 - 8:46pm
Jeff, are these in Dick's parts catalog and if so can you point me to them?
Thanks
Dave

David Waples

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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Jan 22, 2013 - 4:05am
I didn't see them in there Dave.



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David Waples

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of David Waples  Posted on: Jan 22, 2013 - 5:39am
No worries Jeff. I'll give it a look. I'm curious about the construction because I don't see a seam where the two roof sections come together? I'm assuming there's a seam there but they must have done something to keep water from leaking through so a butt joint is hard to imagine. I looked at Frank's book hoping to find something in the construction photos but no clues. No doubt they're there though. If anyone comes up with any photos I would love to see them.
Dave



David Waples

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Dick

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Dick   Send Email To Dick Posted on: Jan 22, 2013 - 12:07pm
David . . .

Its sounds unlikely but the engineering drawings show no, nor specify any type of gasket or sealant used along the aft top joint, merely states a "butt joint" and attachment plates. However where the radiuses roof meets the cabin sidewall it shows and specifies an extruded ( thick L-shaped ) watertight gasket to run around the port, starboard and forward seam where they meet. At these locations the joint is a shiplapped styled fitting between the components, not a butt fit. The rubber gasket protruding from the joint is covered with a moulding board. This moulding board appears as a "trim plate" you see surrounding the cabin where the radiused roof meets the side wall. The roof and the sidewalls have 3/8" plywood covering the structural framing and this plywood is covered with "aircraft cloth".

The same metal plates (butt fit) and trunk cabin treatment ( aircraft cloth and paint ) are the same for the 70', 77' and 80' Elco boats, as indicated on various engineering drawings.

Jeff's beautiful 3D model is exactly as portrayed by the engineering and photos, I would assume the lack of a seam being shown is due to a heavy paint job such as appears when the deck seems to be solid and not individual boards. Below are some image samplings from the various engineering . . . .


















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Will Day

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Will Day   Send Email To Will Day Posted on: Jan 22, 2013 - 2:56pm
Thanks, Dick!


Will

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David Waples

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of David Waples  Posted on: Jan 22, 2013 - 8:56pm
Excellent! Thanks Dick and Jeff for bringing us this obscure detail.
Dave

David Waples

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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Jan 23, 2013 - 2:25am
Nice Dick, that's what I'm talking about! I'm sure many will find those drawings useful. From what I've seen, most of the Elco drawings are drawn very accurately.



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