Re: Type C/UP trucks
Posted by John Greenly on May 20, 2020; 11:06pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Type-C-UP-trucks-tp15497p15672.html
Michael, I've looked through a bunch of photos of wrecks trying to find one of the underside of a type C truck. Sad to say, this one (of a 27' UP boxcar) is the best I have found:
Too bad that guy didn't focus his camera better!
You can see that there are two bars, the lower swing bearing bars, crossing under the spring plank as expected, connecting to the bottom end of the swing hangers. I'd venture to guess that the upper one on the lefthand truck doesn't look like a round rod, but looks flat, so indeed a square or rectangular bar.
I believe there is one other thing to see on the lefthand truck. The bottom surface of the spring plank appears to me to project beyond the bottoms of the transoms (that is, below the transoms if the truck was upright). And I think you can see that this truck has "swung"-- the weight of the truck has pulled it downward to the end of the range of swing movement, so there's no space between the top end of the spring plank and the truck side frame, but there is a space at the bottom end. That's kind of neat to see.
Here's something a little better, the best photo I've found of a C/UP truck from the side (of a Tiffany reefer):
Now you can definitely see that the bottom of the spring plank is below the bottom of the transom beams, and I think you can see that the bearing bar under the spring plank is square or rectangular in cross section, not round. Scaling from a 11" height of the transom beam, I would estimate that both the projection of the spring plank below the transom, and the thickness of the bearing bar, are about 2". I think these are consistent with Phil's drawings and measured dimensions, as he explained them in his second post. I see that Phil, in his latest post, has drawn the bearing bar as rectangular, and that looks good to me, compared with this photo.
Hope this helps some,
John
John Greenly
Lansing, NY
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Type-C-UP-trucks-tp15497p15672.html
Michael, I've looked through a bunch of photos of wrecks trying to find one of the underside of a type C truck. Sad to say, this one (of a 27' UP boxcar) is the best I have found:
Too bad that guy didn't focus his camera better!
You can see that there are two bars, the lower swing bearing bars, crossing under the spring plank as expected, connecting to the bottom end of the swing hangers. I'd venture to guess that the upper one on the lefthand truck doesn't look like a round rod, but looks flat, so indeed a square or rectangular bar.
I believe there is one other thing to see on the lefthand truck. The bottom surface of the spring plank appears to me to project beyond the bottoms of the transoms (that is, below the transoms if the truck was upright). And I think you can see that this truck has "swung"-- the weight of the truck has pulled it downward to the end of the range of swing movement, so there's no space between the top end of the spring plank and the truck side frame, but there is a space at the bottom end. That's kind of neat to see.
Here's something a little better, the best photo I've found of a C/UP truck from the side (of a Tiffany reefer):
Now you can definitely see that the bottom of the spring plank is below the bottom of the transom beams, and I think you can see that the bearing bar under the spring plank is square or rectangular in cross section, not round. Scaling from a 11" height of the transom beam, I would estimate that both the projection of the spring plank below the transom, and the thickness of the bearing bar, are about 2". I think these are consistent with Phil's drawings and measured dimensions, as he explained them in his second post. I see that Phil, in his latest post, has drawn the bearing bar as rectangular, and that looks good to me, compared with this photo.
Hope this helps some,
John
John Greenly
Lansing, NY
John Greenly
Lansing, NY
Lansing, NY
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