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The In-ko-pah Railroad
 Moderated by: Si. Page:  First Page Previous Page  ...  11  12  13  14  15  16   
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 Posted: Tue Nov 14th, 2017 03:23 am
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Ray Dunakin
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A few days ago I posted this photo of a styrene test piece for the covers on the engine:




My plan was to make a rubber mold and cast these things in resin. But that test piece was too rough. Well, I tried a couple more and couldn't get it to look as good as I wanted. So I tried a different approach, making it out of 1mm Sintra and scribing the indentations. That turned out even worse:




Even if I could have created a suitable master, I had doubts about how well such thin pieces would reproduce as castings. So I scrapped the whole idea and decided to come up with a non-prototypical design that would be simple enough that I could make all 20 of them individually. My first test of this was extremely simple, just a flat piece of styrene with rounded corners and a nut/washer in the middle:




But I felt that this was TOO simple. I wanted something that looked a bit more interesting. The design I settled on was made by layering two pieces of .020" styrene. Both pieces had the corners rounded, and I beveled the edges of the smaller piece before gluing it on top of the base piece. Here's how they turned out:








I also did some work on the base for the engine and generator:








.



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Visit http://www.raydunakin.com to see photos of the rugged and rocky In-ko-pah Railroad!
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 Posted: Tue Nov 14th, 2017 03:58 pm
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W C Greene
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There ya go! Extremely nice, crisp detailing. Can we expect anything less!

Woodie



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 Posted: Tue Nov 14th, 2017 07:56 pm
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Si.
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I can smell the fumes from here !



:shocked:



Si.



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 Posted: Wed Nov 15th, 2017 02:41 am
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Ken C
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Ray

Having operated more Diesel / Natural gas engine's then I can count on both hands, the covers you made up are more then
suitable for a engine you are working on. Certain once in place no one will notice.

I put my Diesel project on hold to finish? up a few other project's. It is a Fairbanks-Morse 3 cly version of the F-B shown on the site you posted.

Ken C
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