There are formulas in ASME Section VIII of the Boiler and Pressure Vessel Code that will allow you to calculate, or at least read off a set of curves, the expected maximum external pressure a steel fa

One more piece of information. The ORERs that I checked were 1955, 59 and 65. RG7

Interesting series of cars. Has square-corner 4-4 ends, looks almost exactly like the PFE R-40-10. (Or, the Intermountain model). I'm sure there are people on this list who already know this, but it's

I'm sure others who are more familiar with Intermountain's fumbles will chime in. That long bar across the ends is part of the post-1967 safety standards changes. If you're modeling before then, you c

The photo attached is of a car from the 73501-74250 series, built by Pullman and Pennsylvania Car in 1925. Ron Merrick

To the point about 50 year old underframes being removed service after 1970 or so, in 1970 or 71 I clearly remember, watching switching at the MP yard in Wichita, an IC steel drop-bottom gon that I no

I have a plastic analog (dial) one made by General, which had HO and O scale divisions on it. From the looks of the letter and number style on it, I wonder if it's German. Have had it for maybe 15 or

Thanks, and when I rejoin my books I'll check it. Ron Merrick

Ed: This helps a lot. I have these files downloaded and in paper form, should have pulled this one also to see what it had. My best guess is the bolter-to-bolster sidesill is the major difference in t

Didn't see that brake shaft discrepancy, but I still have a couple of the unbuilt Walthers kits. I assume I will build a couple more in the not-too-distant future since they are again the best choice

Jim: I agree not enough information to positively identify some of the characteristics of the prototype cars, except that the end drawing confirms it's the same as on the model. While many of the Bran

Can anyone shed more light on the boxcar series WAB 7000-7299? I have two Branchline decorated cars that I stopped working on, partway through. My recollection is that I discovered something major tha

While I concede that the silver-painted 10'-6" car is a possibility, I'm pretty sure I see a double door, so I'd go with dark-colored car with lots of white or light gray material on it. Ron Merrick

One of the photos I posted on the Rock Island group, the 20041, appears to have this type of truck. Other cars had a type of roller-bearing 50 ton truck with a flat top to the sideframe, but appears d

I snagged two of the Sunshine 67.1 NYC gon directly from Sunshine at, I think, Naperville. Built one and put one on eBay because it was one of those cars that were probably infrequent visitors to my p

OK, I'm going to take a chisel blade or something to mine to help it flatten down better. I never seem to be able to file down the edges of mine enough to get them to lay right, probably because I'm a

Is this the same as the former Sunshine 67.1? I built one of those, and installed the wood floor in it. My modeling era is 1958-63. I keep all my Sunshine instructions, but they're not where I can loo

That's what I presumed. Thanks, Ed, for confirming it. Ron Merrick

I picked up an Intermountain kit lettered for Illinois Central lease, with the reporting marks NRC 16337, being fully aware that I would have to change something. The MDT book shows these cars as lot

The one on the right is more than likely an MKT car. This is based on the light colored paint, and the marking on the car appears to be part of an M, and the right size. Ron Merrick