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Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Sun May 19, 2019 9:21 pm
by nabob
how did you cure the paint on the smokebox? I would love to have something that looks that good. Thanks, Bob

Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Sun May 19, 2019 10:46 pm
by NP317
nabob wrote:
Sun May 19, 2019 9:21 pm
how did you cure the paint on the smokebox? I would love to have something that looks that good. Thanks, Bob
No cure is required. That Duple-Color paint is
"Engine enamel with ceramic, good up to 500 degrees F."

First fire up seemed to provide any needed cure.
The paint has been stable and hard ever since.
Easy.

I also used it to paint the rest of the boiler.
~RN

Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Mon May 20, 2019 4:53 am
by Asteamhead
NP317,
Seems to be a proper choice! Using this sort of DupliColor silikcon based spray paint for my first painting job, too. :)
Burning the smaller parts inside a pizza oven after being spray painted worked out fine.
Proper cleaning by means of acetone as last finish is necessary of course! :!:
Asteamhead

Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Tue Oct 29, 2019 8:11 pm
by NP317
Finally, as the cold weather sets in, it's time to continue some building info.
This time: The cab windows.

After making the cab walls from drawings, I sketched up the glass windows for the cab.
To make the windows I cut double-strength window glass to the required dimensions for all 12 window panes in the cab.
I cleaned them and applied adhesive-backed copper tape used for making stained-glass lamps & windows.
The edge foil pieces were carefully pressed onto the glass using a pointed wood tool. Then the tape was applied where the inner frame pieces would be.
After a very careful painting of the copper foil and the windows were ready to be installed in the cab openings.
Pics below of a finished windows in the unfinished cab side.
Note that the forward most window sits flush in the opening. Only the rear-two windows slide open/closed.
Unhappily I seem to have lost the photos I took of the foiling process on the glass panes. Sorry.
RussN

Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Tue Oct 29, 2019 8:18 pm
by NP317
Next I had to design and build the brass window slides.
They appear in the previous photos both as individual pieces and temporarily assembled onto the cab side.
To replicate prototypical sliding of the side windows, I machined the shorter tapered filler piece that makes the slide wider toward the front of the cab.
This allows the windows to slide next to each other providing entirely clear side windows for the crew. This also facilitates operating the locomotive through the windows. This is necessary to reach the throttle and Johnson Bar.
Below shows the sets of the individual slide pieces:
#90 Windows 4 sml.jpg
Then how they fit the cab and windows:
#90 Windows 3 sml.jpg
RussN

Re: 90-Ton 2-8-2 Build, 1.5"/ft. Scale, 7.5" Gauge

Posted: Tue Oct 29, 2019 8:22 pm
by NP317
Final details:
The top slides are deeper than the lower slides allowing windows to be placed and removed by lifting them up over the lower slide channels.
They work as planned, so far.

Finally, after finishing the cab, including painting, you can see the finished windows and how they work.
Four attached photos.
I hope this provides some ideas on how to make realistic appearing and functioning cab windows
RussN!