Sheet metal construction fixtures

When I built #10, one of the innovative and useful ideas was to create both running boards out of a single large piece of brass. This helped me get the boiler level relative to the running boards, and since Pembroke is not an incline railway, a level boiler is desirable. I’ve planned the same approach […]

Engine truck design – the murk beneath

When you model something that has been gone for over a hundred years, you get used to squinting at photographs and trying to imagine a design that might present similar patterns of dark and darker. In the case of the engine truck, which is missing from the erection drawing for 622, I found a drawing […]

OnShape and etched fold lines

Due to flooding, progress on real modelling has halted, and I’ve had to move into the virtual realm. This is okay, as there is loads of drawing work yet to do on 622. I speculated a couple of months ago that some careful manipulation of OnShape’s new Sheet Metal Model feature might yield a good […]

Time-travelling Box Queen

A couple of weeks ago, I was lamenting the fact that no trains have run on Pembroke in almost two years. My friend Mark Dance suggested I get a little diesel and convert it; then I could at least bang around a few cars when I want. It reminded me that this was actually part […]

Quite wheelish

My puttering with the form tool is starting to result in things that could be mistaken for wheels. These ones approximate the 30″ wheels for 622’s pilot truck, but with the gross flange of my homemade form tool. I faced them down to the correct 1.63 mm wide, and cut the spoke recess in the […]

Wheel masters

A rather large box of air arrived from Shapeways today. Safely suspended inside were the masters for 622’s wheels. Seriously, the box is over 4000 cubic centimetres of air, and contained perhaps 2 cubic centimetres of plastic! The castings were well protected! No box from Shapeways has ever lasted more than a few minutes after […]

30 inch wheels are small!

Last night’s lathe practice was about making my own tools. All 622’s wheels need a ridge at the edge of the tyre, and so, I made a little boring tool to create that. Once done, I tried it out and made the test wheel shown here. The wheel is the size of 622’s engine truck […]

The year ahead

I realized over Christmas that it’s coming on two years since I decided the best course of action for number 10 was to park it until I have the skills to repair it. As that is my only locomotive, no wheels have turned on Pembroke since then, which is a sad state of affairs for any […]

Sweet anticipation

It doesn’t matter how many times I order printed parts from Shapeways, it still feels like magic. The patterns for 622’s wheels existed only in my mind until I drew them in OnShape. Now in a few days, I will open a package, and they will spill out into my hand – no longer mere […]

Mobile Modelling

It’s hard to believe the iPhone is only a decade old, when the world has changed so much. Today, I had to wait in a parking lot for a few minutes, and as I was thinking about the look of 622’s truck wheels, and how they don’t quite match the photo, I thought I’d see […]