Torque arm for 622

I puzzled until my puzzler was sore about how to affix a torque arm to the NWSL 28:1 gearbox. #10 taught me that we want the arm to be as beefy as possible. But these little 4-4-0s don’t allow us to be profligate with space. In particular, there is no extra space on top of […]

Flywheel and worm for 622

A plumbing emergency this weekend derailed my plans to get much done on 622. However, I did manage to marry the motor with the flywheel and worm. I don’t know about other people, but I find pushing on the end of a motor axle very stressful. A little too much pressure and you’ll be buying […]

622 gets connecting rods

I am not so naive as to believe that the connecting rods would drop effortlessly onto the crankpins. When I built #10, I bet I spent a month fussing over the wobbly bits, before finally declaring a truce and moving on. They were never perfect, but I felt they were probably good enough. After a […]

622 on her wheels

You might expect that at this point it would be a simple matter of dropping the drivers into the chassis, screwing the engine truck on and sending the whole assembly out for a test roll. Sadly, no. Somehow, the design for 622´s springs got changed, and a whole lot of extra metal got added. So, […]

Engine truck wheels

The engine truck, which I primed yesterday, went together more or less as planned this morning before I left for work. Unlike #10, which has tiny equalizing beams and floating bearings trapped in rigid sideframes, #622 allows the whole sideframes to rock. The bearings are simple holes in the sideframes, meaning the wheels are permanently […]

7AM Conference Call

Was I still in my pyjamas? No, but I may have been calling in from the modelling disk. Good thing the camera was off in any event. I blasted a little primer onto 622’s engine truck as it’s going to be hard to do once the truck is assembled. It’s not the hours. It’s the […]

Removing the long axles

With the drivers quartered, the long axles have now served their purpose. I started cutting the first one with a jeweller’s saw. An hour and two blades later, I decided to switch to a cut-off disk and the Dremel tool. I took it slow to avoid melting the spokes or (worse) the axle-wheel joint, and […]

Drivers quartered

There is a saying in the Maker community: if you can’t make it perfect, make it adjustable. The corollary is surely that if you can’t make it adjustable, make it perfect. These drivers are a one-shot deal. Either I get the quartering perfect, or I’m soaking them in acetone to loosen the epoxy, which will […]

Exhaust cam

I am going to steal #10’s ESU DCC decoder for #622; it’s not doing any good sitting in the tender while #10 awaits shopping. This decoder wants four magnets and a Hall sensor to synchronize the exhaust chuff sound. Now, there is not much space on the axle between the gear box and the wheel […]

Improved engine truck assembly

The first time I assembled the engine truck, it was held together mostly by fervent prayer while the epoxy set. The result was as shaky as my belief in prayer! Perhaps if I were more spiritual, this would be a good strategy for me. The second and third attempts leveraged a new pair of jigs […]