wow, thanks for doing this! Several interesting things from my standpoint. First of all, I hadn't paid attention to the cab width dimension before this. The C&S cabs were much narrower at 7' 10" than the D&RG cabs at 8' 6 1/2". This made me go and measure the model, and in fact that cab is 8' 2" wide (outside width), just halfway in between the two prototypes! So I'll take that as a good omen for my #30. (By the way, I see that the cabs on both the PFM 2-6-0 and 2-8-0 are the correct 7'10").
At 8 1/2" narrower and 6" shorter fore-and-aft, we see that the C&S sure liked their cabs snug! I wonder why this difference from the D&RG?
So then I got curious about other dimensions. I hadn't actually measured the wheel spacing on the model until now. The model driver spacing is actually 4'1", 3'3" and 4'1". For some reason they left a little more room between the middle drivers than the very tight spacing on the prototypes. Now I have to wonder about that. The 56 class showed as 37" drivers with a 37" spacing between the middle two. That's what I would call a close shave! Something is not quite right there. In any case, the model is actually very slightly closer to the B-4-A than it is to the C-16. Microscopic differences in HO scale to be sure, but still, more luck for me!
Now I have a question about boiler diameter. Would that given dimension be the outer diameter of the boiler itself, or the total diameter over the lagging and sheathing? On the Westside model the smokebox is 4'2" diameter, agreeing with the C-16 data dimension, while the boiler is almost 4'6". If that's correct, I guess it implies that the given dimension in the data must be the bare boiler diameter. What's the right answer?
Here's one very minor correction for your drawing, maybe? I had noticed one other difference when I first looked at these dimensions: the distance between the first driver axle and the cylinder/stack centerline on the class 56 is listed in the NMRA data as 3' 6 1/2" versus 3'9" on the C-16 and C&S locos. On your drawing all three are at 3'9". Is that right?
again, this is great, many thanks for this excellent data reference!
I remember when the ad from PFM for the C&S 2-6-0 first appeared on the back cover of Model Railroader. I REALLY wanted one, but $39.95 was way beyond my pay grade back then. I didn't know about the Kemtron kit until much later. I wonder what those cost originally?
I bought an On3 one at Caboose Hobbies in the late 1970s. Hold on a minute while I get it off the top shelf. I have the basic structure together. The frame is the hold up. I have an old micro motor but didn't know just how to do the gearbox. I last worked on it back about 1979. I'm just doing my HOn3 stuff right now. I haven't looked at my ON3 stuff in quite a while.
Intermediate C16 On3 Kit
No 3105 $275.00
It had been around for quite a while by then. I wonder what the 1960s prices were?
Now that I think about it, doing an On3 class B4B might be interesting.
In case anyone is interested in a (relatively) affordable source for the Faulhaber 1331 motor similar to the one John used, there's a vendor selling them for $59 apiece on eBay, with the possibility of getting a price break on multiple units:
https://www.ebay.com/itm/50-OFF-NEW-FAULHABER-TATTOO-MACHINE-1331T012SR-12-VOLT-DC-MOTORS/163918720406 They are apparently used for tattooing as well, so by ordering one you may spare some now-20-something-year-old the awkwardness of explaining wrinkled and sagging body art to their grandkids someday.
yup, that's the one I'm using. I was lucky to run across several on Ebay a few years ago for under $30 apiece from some liquidating business. I wondered then what sort of a business this was-- I guess it probably was a tattoo equipment supplier. Now I know I did the world a favor by taking them out of that market!!
These are expensive, but what a wonderful motor, significantly better at super-low speeds than the very good skew-wound motors that NWSL carries. This is the closest I've ever seen to the "ideal" DC motor- absolutely smooth rotation with no cogging whatsoever, exceptionally low starting voltage and current so speed is essentially linear with voltage, and current almost proportional to load. Full torque right from zero speed on up. A disclaimer here: I should say that I don't have DCC in my locos yet, just plain old DC, so can't judge how these would be in DCC operation. Maybe someone with experience could comment? I'd be interested.
don't you think these would be good to add to the Files section on the blog- at least the C&S ones. Maybe I would be forgiven for suggesting the Rio Grande ones too-- just for comparison, of course, not that anybody's interested in them for themselves....
I don't mind sharing what I have. I was told by a friend one time that "Knowledge is Power" and that I should keep all this stuff to myself.
That's ridiculous. Having knowledge about a subject that seems to have had its records scattered to the four winds and those who actually worked there now pushing daisies it seems to me that it should be a group effort.
I will try to post as much as I have and hopefully others will come up with more.