Search found 231 matches

by jscarmozza
Mon Apr 16, 2018 8:17 am
Forum: Live Steam
Topic: Locomotive Roller Test Stand
Replies: 15
Views: 667

Re: Locomotive Roller Test Stand

I attached a photo of test rollers that my buddy and I made last year, they're adaptable to any of our engine stands and convert them to test stands in about 30 minutes. We cast the roller bodies in aluminum, and attached the 7/8" OD roller bearings with 1:4" flat head steel screws, the roller bodie...
by jscarmozza
Mon Apr 09, 2018 6:29 am
Forum: Casting & Foundry Work
Topic: What is causing my castings to be porous?
Replies: 7
Views: 514

Re: What is causing my castings to be porous?

Hi Dave, good to hear from you. Yeah, 'burning it off' isn't going to cut it, I'm going to have to pay attention to what I melt and how I melt it. On a related matter, my surfaces were getting progressively rougher with each pour, I knew what I had to do but was too lazy to fine screen all of my mol...
by jscarmozza
Sun Apr 08, 2018 8:22 am
Forum: Casting & Foundry Work
Topic: What is causing my castings to be porous?
Replies: 7
Views: 514

Re: What is causing my castings to be porous?

Charlie, about 20 years ago the local highschool ended shop classes and I bought some of their machine tools, including their foundry equipment. Along with the furnace, tongs, ladle and crucibles came large plastic jars filled with powder, one white, one pink, and a number of foil wrapped cakes, all...
by jscarmozza
Thu Apr 05, 2018 6:14 pm
Forum: Riding Scale Railroading
Topic: Has anyone tried this?
Replies: 13
Views: 1233

Re: Has anyone tried this?

I gave up on it already, after buying the materials and making the necessary castings I decided to just put down a third rail on my backyard track. I have too many projects going to start something else, making this contraption was going to be as involved as making the frame, wheels and axles for a ...
by jscarmozza
Wed Mar 14, 2018 7:38 am
Forum: Live Steam
Topic: DRIVER PRINT ?????
Replies: 36
Views: 1895

Re: DRIVER PRINT ?????

They're much more complicated than they look, and unique in many ways, as per your discussion of the wheels. Reference points are also very difficult to establish and maintain throughout the build. The compound curves of the body, the shape and placement of the various features, doors, windows etc.....
by jscarmozza
Tue Mar 13, 2018 6:11 pm
Forum: Live Steam
Topic: DRIVER PRINT ?????
Replies: 36
Views: 1895

Re: DRIVER PRINT ?????

Dave, you gave good advice and Doug did a beautiful job executing it, the pattern/core box works exactly how you described it. Doug was surprised to see his project resurface after so many years, although he wasn't too impressed with my body work. I'd be interested in seeing a GG-1 done by a pro, I'...
by jscarmozza
Mon Mar 12, 2018 8:03 am
Forum: Live Steam
Topic: DRIVER PRINT ?????
Replies: 36
Views: 1895

Re: DRIVER PRINT ?????

This 1" scale GG-1 wheel pattern was made by Doug Mehring, NJLS, many years ago.
by jscarmozza
Fri Mar 09, 2018 4:16 pm
Forum: Casting & Foundry Work
Topic: What is causing my castings to be porous?
Replies: 7
Views: 514

Re: What is causing my castings to be porous?

Thanks Harold, a lot of information to digest.
by jscarmozza
Thu Mar 08, 2018 4:36 pm
Forum: Casting & Foundry Work
Topic: What is causing my castings to be porous?
Replies: 7
Views: 514

What is causing my castings to be porous?

What could be causing my brass castings to be porous? I cast a pump body for a test pump last fall, when it was finished I was able to push water through the casting walls. In the same lot of castings I made some simple brass blocks for use where needed. I milled two of them to square them up and im...
by jscarmozza
Sun Mar 04, 2018 9:12 am
Forum: Riding Scale Railroading
Topic: Has anyone tried this?
Replies: 13
Views: 1233

Re: Has anyone tried this?

Tom, that's exactly what I was looking for, thank you. In your description, the builder went from larger to smaller, I want to go from smaller to larger. The builder must have gone with some type of direct friction drive, hence the reverse rotation of the driven wheels. My plan employs an idler gear...
by jscarmozza
Fri Mar 02, 2018 7:55 pm
Forum: Riding Scale Railroading
Topic: Has anyone tried this?
Replies: 13
Views: 1233

Re: Has anyone tried this?

The dyno sounds like a neat device, I'd like to know my engine's horsepower. Looks like I'm blazing a new trail with this thing, I'll let you know how it goes. Thanks, John
by jscarmozza
Fri Mar 02, 2018 11:20 am
Forum: Riding Scale Railroading
Topic: Has anyone tried this?
Replies: 13
Views: 1233

Re: Has anyone tried this?

I've had a very nice 1/2" Hudson for about 12 years and never had it running, my buddy coaxed me into getting it tested, cleaned up and steamed over the winter. We did it and it's a sophisticated little engine that runs like a Singer sewing machine, smooth. Unfortunately there aren't too many 2 1/2"...