Weekend Update 3/26/23

[chessie system fan]

That should be a fun design project.  I hope you're aware of the detailed drawings done in an old MR from 197...1? or 2?  Something like that.  You need trucks with a 68" inch wheelbase.  A quick search shows that a MLW Dofasco truck is 67"  and I predict that is the closest you'll find.  Plus, it has the correctly-sized 40" wheels.

Similarly, Alco RSD-5 trucks have a 67" wheelbase on the short side.  You could chop up a couple Atlas trucks and pickups and go from there.   Or better yet, 3D print a new gear case and use Atlas RSD gears in it.  Reverse engineering the Atlas gear case shouldn't be too difficult. 

https://trainiax.net/drawings/18-mlw/m6/dim-18-mlw-m636-cp-2-m.GIF

http://prr.railfan.net/diagrams/PRRdiagrams.html?diag=as-16a.gif&sel=die&sz=lg&fr=

[dnhouston]

David, the granite looks great....castings or carved?
Otto K.

Otto,
It was mostly castings with hand carved to connect them.
Here is what it looked like with just the castings

[Cajonpassfan]

Well done David, thanks!

[nkalanaga]

I think you're right on the front truck, it's basically a 4-8-0 frame pivoted under the body.

However, I suspect that the rear section is a 4-8-4, with both "pilot" trucks pivoted under the frame. 

[chuck geiger]

ARM says delay in SP Cinders, so off to the ballast and rock/sand stash. Found ground asphalt from Alaska I had
and mixed with with desert sand and WS Black Cinders.

[Zack L-J]

That should be a fun design project.  I hope you're aware of the detailed drawings done in an old MR from 197...1? or 2?  Something like that.  You need trucks with a 68" inch wheelbase.  A quick search shows that a MLW Dofasco truck is 67"  and I predict that is the closest you'll find.  Plus, it has the correctly-sized 40" wheels.

Similarly, Alco RSD-5 trucks have a 67" wheelbase on the short side.  You could chop up a couple Atlas trucks and pickups and go from there.   Or better yet, 3D print a new gear case and use Atlas RSD gears in it.  Reverse engineering the Atlas gear case shouldn't be too difficult. 

https://trainiax.net/drawings/18-mlw/m6/dim-18-mlw-m636-cp-2-m.GIF

http://prr.railfan.net/diagrams/PRRdiagrams.html?diag=as-16a.gif&sel=die&sz=lg&fr=

Sweet, thanks for the truck tips! The diagram I got from the chessie museum gave me trucks with a spacing of 70, 70, 70, 68, so I was rounding up to 70. I can just as easily round it all down to 67. I don’t think 1/160th of 3 inches is going to be very noticeable.


And no, I had no idea about the MR issue. I can’t seem to find any places to view it online, are there any recommendations in that regard?

[GimpLizard]

And no, I had no idea about the MR issue. I can’t seem to find any places to view it online, are there any recommendations in that regard?

The issue in question is February 1971, pages 47-49, 'C&O's steam-turbine locomotives'. If you have a subscription to MRR, you can access that issue at trains.com/mrr/magazine/archive-access/

[wm3798]

Packed up the layouts and the stacks of stuff, and put them into storage for a few months...






Hopefully by September the drywall work will be far enough along that I can bring them into the new house fearlessly.

Until then, I shall rely on old photos and living through you all's work vicariously.

Lee