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Topic: Unknown Object |
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gberger
New Member
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Posted on: Sep 4, 2018 - 9:35am
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Does anyone on the forum know or can shed light on what this object is on the aft end of the eng. room cover. It appears on several of the earlier boats and can only speculate as to it's function. I first thought it a form of speaker or vent. Help. I'm completing a build and wish to incorporate this on board.
GB |
Total Posts: 7 | Joined:
Apr 7, 2014 - 12:09pm | IP
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TED WALTHER |
TOP BOSS
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Posted on: Sep 4, 2018 - 4:54pm
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GB;
What scale are you building? This is included in the 1/35th PT 109 from Italeri, part 14D and Part 66E.
Take care,
TED
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Total Posts: 3059 | Joined:
Oct 16, 2006 - 7:42am | IP
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Drew Cook
TOP BOSS
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Posted on: Sep 4, 2018 - 5:34pm
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Looks like its affixed to the base of the 20mm limit rail brace...a horn..?
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Total Posts: 1306 | Joined:
Oct 19, 2006 - 10:44am | IP
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Jerry Gilmartin |
TOP BOSS
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Posted on: Sep 4, 2018 - 5:47pm
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I think it looks like a cease fire buzzer horn. It signals from the helm to gunners when to stop shooting. I have seen similar horns installed on early Higgins boats and on schematics. They also have a signal for the depth charges. Jerry
Jerry Gilmartin
PT658 Crewman
Portland OR |
Total Posts: 1473 | Joined:
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gberger
New Member
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Posted on: Sep 4, 2018 - 8:21pm
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A horn looks the part. I'm finishing a 1/16 scale boat. PT-117. I'll post photos soon of the completion. Thanks.
GB |
Total Posts: 7 | Joined:
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Jeff D
Moderator
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Posted on: Sep 5, 2018 - 5:19am
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You nailed it Jerry, from Detail Specifications For Building Motor Torpedo Boats, March 1944 (http://archive.hnsa.org/doc/pt/specs/):
1 P. B. for bridge to horn for aft 20 mm. gun cease firing signal, circuit 5U (sec. S71-1).
Circuit 5U-Light projectile machine gun cease firing signal.- This system shall consist of a 24-volt direct current horn similar to Type H5a horn (BuShips Spec. 17S11 (INT)) at the aft 20-mm. gun energized from the bridge. Supply shall be 24-volt direct current. Navigation horn will serve as an audible signal for forward 20-mm. and 50-caliber machine guns. (See sec. S64-1.)
It looks like this Federal Model 35 horn:
Or this Federal Model 42:
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Total Posts: 2200 | Joined:
Dec 21, 2006 - 1:30am | IP
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Jeff D
Moderator
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Posted on: Sep 5, 2018 - 5:48am
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Here's some clips from Dick's drawing DVD.
PT 103-196 and 314-319 on the right, 320-367 on the left:
PT 372-383, 546-563, 486-545, 731-760:
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Total Posts: 2200 | Joined:
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gberger
New Member
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Posted on: Sep 5, 2018 - 8:11am
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WOW! Jeff....you da man. I couldn't have asked for more. No excuse to not get it right now.
BTW, I wanted to thank you for the extensive research and posting of your PT103 site. I have relied heavily on your work and could not have accomplished this build without your efforts. Gene
GB |
Total Posts: 7 | Joined:
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Daniele Klay |
Advanced Member
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Posted on: Sep 5, 2018 - 9:38am
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Any clue of where it was positioned after installation of aft 40mm gun and related ready ammunition rack ?
Regards
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Total Posts: 126 | Joined:
Jun 23, 2015 - 12:43pm | IP
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Jeff D
Moderator
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Posted on: Sep 5, 2018 - 10:33am
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You're welcome Gene, I'm happy to hear you are making good use of my site!
No idea here Daniele.
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Total Posts: 2200 | Joined:
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