CNR 3737 :: details, details

I visited my friend Andy Malette yesterday, for another work session on our CNR 2-8-2 project. This time, we tackled a couple of details.

Up front, I added the CNR’s triangular number board to the smokebox front. This really completes the face of any CNR steam locomotive. I do like the appearance of CNR engines – very stylish, yet purposeful:

CNR 3737 - front number board

At the back, we realized we had not yet installed the smoke lifter on the cab roof. This seemed like a good time to add that part. We cut a piece out of thin brass, curled it in our fingers, then soldered it in place. It was easier than I expected:

CNR 3737 - cab smoke lifter

I like to think of it as the rear lip spoiler – keeping the rear of the locomotive planted on the track at speeds above 50 mph…

The smoke lifter needs seven small triangles added behind it as braces. I’ll tackle that next.

CNR 3737 :: that’s MUCH better…

Last week, I wrote about a wonky headlight on my CNR 2-8-2.

This week, I stole a bit of time from other commitments to hit the workbench. I unsoldered the assembly, repositioned it, and secured it back in place. I even managed to add the mount for the number plate, complete with grab iron. The face of CNR 3737 now looks like this:

CNR 3737 - Headlight fixed

I’m back on track. And it occurs to me that I will have to ask Andy Malette about number plates for our project.

DCC for an HO ALCo S2

My friend Stephen Gardiner asked if I could install a LokSound decoder into one of his locomotives while he took notes. I was happy to oblige, so he came over yesterday and following a quick brunch at Harbord House, we got down to it.

The locomotive in question is an Atlas HO scale ALCo S2 – one of the newer series that’s set up for DCC and sound, but was wired for straight DC operation (no decoder). I’m glad that I’d recently finished doing such an installation into an HO scale Walthers EMD SW-1 model (which I have posted about previously on this website), because that experience gave me the foundation I needed to tackle this project. Over three or four hours, I shoehorned a LokSound Select Micro, a PowerPack electronic flywheel, and two sugar cube speakers into Stephen’s model.

Stephen has written more about the day, on his website. You can visit his site and read his report by clicking on this photo of me at work…

I have no idea what I'm doing

Overall, the project went really smoothly – there was plenty of room under the hood and in the cab for everything. With the wiring done, we downloaded the appropriate file from ESU and discussed other things for the 20 minutes or so it took to write into the locomotive. I then did loaded CVs from the decoder I used in the SW1 and adjusted some values for the S2. The finished locomotive runs very smoothly and sounds great. It’s now up to Stephen to paint it.

It’s the first time I’ve had two people working together in my workshop, and I’m really pleased with how that worked out. A most enjoyable afternoon!

CNR 3737 :: That’s just SO wrong…

Yesterday being Friday, it was time for another work session on the CNR 2-8-2 project with Andy Malette. Andy had prepared a bunch of parts for me to install on the smokebox front, and he warned it would be a challenging day. Boy, was he right.

Mounting a pair of class lamps was straightforward enough – the stock model featured class lamps in the same position as the CNR lamps, so it was a simple process to enlarge the holes to accept the castings, line them up, and solder them in place. I also rebuilt the hinges, which had lost some of their material while turning off the dogs during our previous work session.

The headlight was another story – and all I can say is, it’s a good thing brass is so forgiving because I’ll be removing it all and trying again. Do not judge me for this picture, which I’m sharing to remind myself that this isn’t an easy thing I’m attempting, and there will be set-backs:

The Headlight: SO wrong
That headlight is just SO wrong…

The headlight is a complex assembly. There’s the headlight itself, plus the platform upon which it sits. There’s an angled brace between the bottom of the platform and the face of the smokebox. And there’s a vertical plate (not shown) at the end of the platform, to which the number board is attached. This vertical piece also has a grab iron.

At one point, I had most of these pieces in place – just the grab iron to adjust. And that’s when the smokebox face popped out of the vise and hit the floor. Back to square one, with some swearing and scrounging for parts under the workbench. The second attempt ended miserably, too. And the third attempt – almost four hours into the session – ended up wonky despite my best efforts. I’m going to have to pull the #&$%#& thing off the smokebox face, clean up everything, and try again. But not today.

I’ll get it, eventually – and the sense of accomplishment will be even greater for all the effort that went into it. Then I’ll tackle the number boards…

CNR 3737 :: Smokebox front

On Friday, Andy Malette hosted me for another work session on the CNR 2-8-2 project – and we tackled a major modification: the smokebox front.

New smokebox front

Our donor engines are USRA-designed light Mikados from Overland Models, which feature a smokebox front held in place with 20 dogs. Depending on the class of locomotive (and possibly the builder) Canadian National Railway steam engines featured either 10 or 12 dogs on the smokebox front.

We tend to notice these things, so it was obvious that the old dogs would have to come off and be replaced with new ones in the proper pattern. In this case, I would need 12 dogs – which means I couldn’t even cheat and simply grind away every other dog on the USRA smokebox front.

The Overland Models smokebox front is removable, but the dogs are cast as part of the face. So the easiest way to remove them was to turn them off on a lathe. I worked with very light passes, checking my progress frequently until I was happy with the results. After using the cutter, I finished up with progressively finer grits of sanding paper until all evidence of the dogs had disappeared. (This process also removed a portion of the hinges, but they will be relatively easy to replace with brass strip.)

Once the old dogs were gone, it was time to install new ones. Andy has some dogs cast by another friend of ours, but I would have to drill the smokebox face to accept them, then solder them in place. We moved the smokebox front from the lathe to the mill and added a 12-position indexer to evenly space the holes:

Index and centre drill

I started with a centre drill, then carefully drilled for the dogs, adding cutting oil for each hole. The last thing I wanted was a broken drill – Andy said he’s ruined a couple of smokebox fronts that way – and I’m pleased to report I drilled 12 perfect holes with no incidents.

Andy then locked the smokebox front in the vise and demonstrated how to solder these tiny dogs into place. He did the first one – I did the next 11. A minimal amount of flux, heating near – but not on – the dog, and a light touch with a thin length of solder on the side away from the heat was the key: Done right, the solder would melt onto the face of the smokebox than draw itself under the dog.

Here’s a composite photo showing the smokebox front, before and after the alterations:

Smokebox before and after

I think it was definitely worth the effort.

As part of this work session, I also added a drain pipe to the feed water heater, which I’d somehow missed during last week’s piping session. It’s the smaller pipe in this next photo, just ahead of the large exhaust pipe:

CNR 3737 Piping progress. Engineer's side front.

There are still a few details to address – including the various appliances that mount on the smokebox front. But I now feel confident that CNR 3737 is heading towards the paint shop this year. I’m really pleased with the progress made so far this month and look forward to the next session…

CNR 3737 :: The engineer’s side

After a hiatus for the holidays – and a month of avoiding the outside as much as possible due to heavy snow and bone-chilling cold in our part of the world – Andy Malette and I emerged like Wiarton Willie (a month late), saw our shadows, and decided it was time to continue working on the CNR 2-8-2 project.

At yesterday’s session, I turned my attention to the engineer’s side of the engine:

Piping - Engineer's Side

Here, I added some new piping, including the assembly in front of the cab and the angled pipe leading to the Hancock check valve on the top of the boiler, to the right (ahead) of the steam dome. I also reinstalled some piping under the cab and below the running board. And, I fabricated and installed the raised running board section that spans the power reverse unit.

For some reason – still a mystery to me – my soldering was much better today than it has been in the past. Maybe I’m finally getting the hang of this? I won’t inquire too closely – I’ll just roll with it, and keep doing what I’m doing. We’re having another session in a week, when I’ll tackle a project that will make major change to the appearance…