Prepped to prep

The flat cars have taken a little hiatus while I figured out the best way to make paint stick to the plastic parts. My usual method is to give plastic models a good scrubbing with Vim under running warm water. But with parts made of wood and even paper, that method was going to lead […]

Closing in on wheel castings

Thanks to Brian Pate, and to Don Mitchell who suggested I call him, I’ve started vacuuming my castings when I pour them. Brian indicated that he liked to vacuum before and after pouring, but I’ve found the pre-pour treatment makes little difference. The post-pour treatment, on the other hand, dislodges all sorts of bubbles from […]

Bubbly bolster

The wheel plan for 622 requires perfect castings. Unfortunately, every attempt so far using my test molds has resulted in large bubbles. These bubbles are not there when I pour the resin, but seem to be forming during the curing process. According to the Smooth-on website, this could be due to humidity, and I should […]

Solvent fail

I should have known I was in trouble when the Tamiya cement so reluctantly entered the syringe. But, my trusty MEK Pak has finally breathed out the last of whatever makes it work, and so, I was stuck (so to speak). So I went ahead and made that test mould with Tamiya Cement. Plainly this […]

Test masters

I was just about to glue my 3D printed wheels to the bottom of a box and rashly pour rubber over them, when my inner project manager whispered in my ear and pointed at the risk register. Wrecking the Shapeways wheels would put me back a couple of weeks and $16 in shipping alone! For […]

First four tyres

The photo above presents the first four Proto:87 tyres to be found among the chips around my lathe. These are the 30″ pilot wheels, and their brass centres need to have spokes cut in before getting soldered into the tyres. They’re not perfect, but every wheel is better than the last, and I think these […]

Wheel Progress

Parts for the first wheel rolled off the lathe this week. The engine truck wheels are only 8 mm in diameter, and have eight spokes. The spokes themselves are only a couple of millimetres long, and so, I have elected to make these wheels in two parts – a tyre and a centre. I actually […]

Momentum

I didn’t realize it at the time, but the worst thing about the great flood of 2018 was that it completely destroyed my momentum. At the end of January, I had finally arrived at a place where I thought I might be able to cut Proto:87 wheels for #622. I had even cleaned the lathe […]

Treasure at the Winnipeg Railway Museum

The day after our trip on the Prairie Dog Central, I carved half an hour out of the family vacation to visit the Countess of Dufferin at the Winnipeg Railway Museum. This venerable old engine is the one that I could find that has a mud drum, and she was going to help me with […]

Frame pattern for 622

Working fifteen minutes at a go, I’ve finally finished putting together the pattern for the thicker Nickel Silver sheet. I think if I’d been more cunning, I almost could have fit two whole models on there. As it is, there will be plenty of leftover etch and there are doubles of all the riskiest parts. […]