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 Author  Topic: Turret and Twin .50 Mount Colors
Frank J Andruss Sr

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Frank J Andruss Sr   Send Email To Frank J Andruss Sr Posted on: Jan 4, 2009 - 10:34am
Jeff could you contact me please mosquitofleet@comcast.net


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Drew Cook

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Drew Cook  Posted on: Jan 4, 2009 - 11:59am
Jeff,

Purely from an observational perspective...the turret ring, gun mount and gun depression rails in the "flipped" (backwards) color photo of (what I think is) PT 107 on that U.S. Navy color photo site we were looking at some months ago show them to be the same color as the rest of the boat (Measure 5-D?).

This seems to be pretty consistent (the colors of the aforementioned items being the same as the rest of the boat) with all the color photos of PTs I've seen...


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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 9, 2009 - 11:44pm
Jeff

Before this post gets too old or further back in the listing, I want to make sure I compliment you on and outstanding model, the detail is exquisite. Many of the message boarders that aren’t draftsman, engineers or technical illustrators probably aren't aware of the countless hours this must have taken, specially since solid detail engineering does not exist anymore for the level of detail you included in the model.

To say the least, I'm a little, well, lets say very much envious of your CAD/Modeling skills. I only wish I had the time and money to learn this aspect of my career passing me buy – not to mention the battle of aging thrown into the mix. For now it’s the old parallel edge, triangles, pencil pointer and good old Scum-X. Along with Adobe Illustrator and PhotoShop for the final art.

Again, job excellently done, your model is mere beauty to these eyes.

Dick . . . . .




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  Jerry Gilmartin

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jerry Gilmartin   Send Email To Jerry Gilmartin Posted on: Jan 9, 2009 - 11:57pm
Hey Jeff,
I went to look at the real 50 cal turret that we have on board PT658 and looked at those feed rollers (the lower ones) I always thought they were rusty steel, but I took a wire brush to them and guess what? They are made from some sort of "Bakelite" plastic material. They are definitely not brass or steel. By the way, I figured out how they work too. There is a square plate with a hinge pin on one end and then on the opposite end are the 2 rollers. When you want to load the ammo belt, you must squeeze those 2 pins together, which is against a spring loaded shaft for each roller. The movement of the shaft disengages them from sockets holding them and the rollers in place, so then you can swing the whole square plate up and reach down through the wider opening and feed the linked ammo belt through the hole, then you squeeze those two pins together and re-engage the roller axles into their sockets and the rollers stay in position. It is a lot simpler than it sounds. Just in case you care. By the way those rollers are a dark brown plastic looking material, and when I wire brushed it just got rougher but did not change color. OK so know you know! Jerry PT658 Portland Oregon

Jerry Gilmartin

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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 10, 2009 - 4:36am
Wow Dick, thank you very much. I haven't blushed in years...

Actually that's a lie. The last time I blushed was when I posted one of Gene's images I found on another site and didn't notice that A: it was one of Gene's I already had saved on my computer, and B: They were numbered incredibly wrong. My official excuse is that I did this after 14 hours of working on my PT project. But even that doesn't explain B.

I really appreciate your work too. Stick me in front of drafting tools and I'd be lucky to draw a stick man. The deck layouts you created are beautiful and a great resource for anyone with an interest in PT boats. Speaking of fine work, I look forward to your Higgins project updates.

You got it right about the time, as I'm sure you well know. Trying to nail down dimensions from perspective warped photos is an exercise in frustration. An e-mail buddy made me laugh when he called it "forensic CAD". I try to get within 1/100" but can only do that when I have "official" measurements which are scarce as hen's teeth. Lack of them turns 10 hours of accurate modeling into 100+ hours of guesswork. But it's worth it, I dislike modelers and do my best to get them to trust my drawings, then make their lives miserable by including more detail than they can possibly reproduce in something like a 1" long twin .50 mount. Just kidding.

Jerry, thank you very much for explaining that and for the material information. Although thanks to the images on your site I had some good references for modeling, I didn't really know how they worked. After a few minutes of head scratching, your explanation sunk in and now they make sense. Is that the springs between the rollers? In some of the images, the rear rollers look like cams that would lock the belt from falling our if rotated forward. Or or are they just rollers? Thanks in advance, and if you have any closeup images handy could you please send them to jeffd at pt103 dot com?



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  Jerry Gilmartin

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jerry Gilmartin   Send Email To Jerry Gilmartin Posted on: Jan 11, 2009 - 9:59am
Hi Jeff,
I will take some closeup pictures of the 50 cal turret with a ruler for scale of different parts of the entire thing. I am planning on going there this Thursday so I will email you photos probably next week. I will take pictures of both the roller assemblies and the rest of it just for your records. Jerry

Jerry Gilmartin

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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 12, 2009 - 4:41am
Thank you very much Jerry, that will be a great help. I'll hold off on posting a parts drawing so I can include your details of how the guides really work. I really appreciate you going out of your way like this and it will be interesting to see how far off on the dimensions I am.



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victorkchun

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Post a Reply To This Topic    Reply With Quotes     Edit Message   Posted on: Jan 14, 2009 - 9:28pm
Hi Jeff D,
The beautiful and detailed picture of the turret and twin .50 mount is out of this world. I really thought it was a real one. What scale is it? Are you
building a boat or just the turret? Which boat are you building? I welcome any information you can furnish me. It must be quite a project.
Victor

Victor K Chun

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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 15, 2009 - 1:15am
Thank you Victor, it is a CAD model and part of an ongoing project I'm working on at http://www.pt103.com/. I plan on doing a complete 103 class boat and am trying to include factory changes up to PT 367. The finished boat will probably be a boat in the 109-138 range. I'm working at a 1:1 scale inside the program although that can be changed. As 3D printing technology advances, maybe one day I'll be able to print out parts in any scale desired.

I've really enjoyed your book Victor, it has been a great reference for me.



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victorkchun

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Post a Reply To This Topic    Reply With Quotes     Edit Message   Posted on: Feb 13, 2009 - 8:52pm
Hi Jeff,
Thank you for your reply to my question that I posted sometime ago. Since I was not familiar with how to use the message board, I didn't find your reply until last night.. I don't pretent to understand all that you said, still what you are doing is mind boggling. First of all, what is a CAD model?
When I was with Hughes Aircraft Co. as a plant engineer, I heard our draftsman mentioned CAD which I understood to mean using a computer system to do drafting. Am I right? If so I assumed you are working on a project that when finish, a person can build a real PT boat. In that case, all the drawings will surely benefit the modelers which is my main
concern. The isometric drawing of the machine gun turret is a modeler's
dream. What I am thinking is may be all wrong about the purpose of
your project. So please advise.
Victor

Victor K Chun

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