Thanks to Don Ball for replying to my previous post regarding brakes. He came up with a page from the 1906 Locomotive Builder’s Dictionary, and a Model Railroader article by Gordon Odegard that completely reformed my belief about how these brakes probably worked. Rather than that tiny vertical equalizing lever, it is likely that they […]Read More 622 brakes revisited (again)
“I do all my best work in bed,” famously and salaciously declared Mae West. And so it was, I awoke the other night with the solution to a problem I’d given up on long ago – the drawbar. Confusingly, the drawbar of a locomotive is not the thing that pulls the train; I think that’s […]Read More Drawbar dreams
The basement shows no sign of being finished, and so, I am continuing to refine the plans for 622. One of the challenges will be maintaining the relationship between the two frame halves while the insulating epoxy layer sets. I had been thinking I would add sacrificial tabs at the ends of the frame, and […]Read More Loco frame jig
It appears that the brakes are another part that has now been redesigned. I’ve simplified them somewhat from the first version. To tell the truth, I’m hoping that someone can point me to a resource that shows how this pattern of brakes worked. It seems they were favoured by Baldwin for a short period in […]Read More Brakes in the darkness
…or at least an hour anyway. As I was working my way through design of the running gear for 622, the reach rod for the reverser proved to be an interesting conundrum. According to the drawing from Baldwin, the lever for lifting the valve gear is supposed to be 21 inches long. This, along with […]Read More 3D CAD saves the day
The valve gear for #622 will be printed as a single part. As with most of the parts, the original drawing needed to be redone. The first time around, I thought I was very clever by using a minimum of sketches. I chose parts of the sketches to extrude to different depths, but hard-coded the […]Read More Valve gear – a complex OnShape part
As we don’t want another flood, the Boy and I spent more than an hour getting at the offending floor drain today. Naturally, it is under a stud (supporting an electrical outlet), and so, it wasn’t a simple matter to get at it. The hole is simply straight through the concrete, 3 1/2 inches in […]Read More Flood update: but of course it’s under a stud!
To be honest, I don’t know if I would have this much patience if the real workshop were not still out of commission. The sheet metal design for the crosshead guides and crossheads took several days (well hours, as I don’t spend whole days on this stuff!) due to a disagreement between OnShape and me […]Read More Redesigned crossheads refine OnShape technique