I just pushed a post to my blog, Part 2 of frame construction: https://glenn.pulpitrock.net/blog/posts/2022-07-25_168_frame_2/ Mike Conder, a particular shout-out goes to you for shaping my head on we

Mark, Good point about #168 and its ilk; when I rode behind it on the Friends charter last year, it showed its limits a bit getting re-started on the curve near Hangman's trestle for the run-by; that

Mark, thanks for this. I'm just starting to think through propulsion for my #168 model, and I find the 1020D will fit nicely inside the firebox. I was hoping to power the main driver, however, and I t

That should be interesting. I started with laser-cut frame sides, drew them in LibreCAD and send the .dxf file to OSHCut, 0.02" brass. I guess they have some sort of .dxf -> cnc converter. Came out qu

The boiler ID is a little north of 15mm, so there might be a bit of room for a metal wrapper around a 12mm motor. Yeah, what you see in the picture is quite light. A metal frame is still not out of th

I got the drivers from scalelink.co.uk. Pictured are the 12mm drivers; the 13mm are closer to the 45" diameter of the prototype, and I go back and forth between the two, considering their appearance a

I think I've finally got a set of parts to capture the essence of a T-12 engine: All loosely assembled because I can't find my box of 0-80 bolts and nuts. The essential components are: 1. Frame/Cylind

At the MRH forum, Bill Lugg is documenting his build of the Cheyenne roundhouse using 3D printed walls. https://forum.mrhmag.com/post/laramie-wy-roundhouse-build-ho-scale-12349718

I'm seeing it on almost every print, unless I support the you-know-what out of it. What I'm gradually coming to is 1) orient the model so the least "favorite" sides and edges are interfacing with the

Oh, good put. So, I won't delete the edge supports, and add the underside ones. I'm not going to print another immediately though; going to shift my efforts to the drive train, and a different take on

New post on my DRG #168 project, designing and fabricating the cab: https://glenn.pulpitrock.net/blog/posts/2022-06-12_cab/

The drawing I have of #169 shows the firebox front back at least 3 feet from the tapered course, and the photos of #168 confirm that. For the other end, I don't have a precise measurement but I have a

Oh, I'll take any photos I can get. I have a bunch already, but it's amazing how you can go back home after such an opportunity and find you're still missing a view of some detail you're trying to mod

Indeed, the prototype has conical rivets. I'd originally coded the modules with spheres, then went to lay out the rivet courses on the smokebox; brought up a photo, zoomed in and gee, there they were.

Just finished another post on 3D printing #168: https://glenn.pulpitrock.net/blog/posts/2022-06-08_168_smokebox_boiler_firebox/

I started a blog to capture all the things I learn along the way building DRG #168. First relevant post is on design and fabrication of the frame: https://glenn.pulpitrock.net/blog/posts/2022-05-26_16

Reading the reviews, Blu sounds like a good functional resin. Ordered two additional vats with covers, so I can easily switch out resins.

Elegoo Plant-Based Tough. It's the bottle I bought with the printer. I ordered their ABS-like yesterday, to try with the frame.

Last time I posted something on my project, I was messing with laser-cut metal frames. Well, I've vectored away from that and am experimenting with resin-printing the frame. Results look promising so

Here's a screenshot of what I've modeled so far: I slowed down CAD modeling to set up for 3D printing. I did get Shapeways to print the domes; they turned out nice, but extrapolating the cost to do th