Re: Case of the Missing Truss Rods - Revisited
Posted by Jim Courtney on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Case-of-the-Missing-Truss-Rods-Revisited-tp6387p6415.html
Well, Scotty, I will defer to the engineer . . .
But there is nothing about the additional photos that you posted that is inconsistent, you are merely mixing 26 foot Litchfield cars (truss rod under frames) with 27 foot UP built cars (no truss rod, but needle beam under frames).
The first boxcar on its side is a 27 foot UP built car: Remember Rudnick's Rule--note the square poling pockets on the sides of the corner irons, and the Heitkamp Convention --"type C" arch bar trucks (tall transom beams). No truss rods.
The second boxcar on side is a 26 foot Litchfield car: "Type A" trucks (short transom beams), ladder on car sides, no visible square poling pockets. Two truss rods.
Robinson boxcar end is of a 27 foot UP car: Corner irons bulge out to side for square poling pocket. End fascia underside is curved, a UP build feature. No truss rod bolt heads.
Buffalo boxcar end, 27 foot UP car: Square side poling pocket, "type-C" truck (tall transom beam), curved under edge to end fascia. No truss rod bolt head.
Fairplay boxcar is indeed a 27 foot UP built boxcar, as number 969 was the very last car built by the UP in the fall of 1883 (the Peninsular 30 foot cars began with number 970): Square side poling pockets, "type-C" truck (tall transom beam). Clearly no truss rods.
Fairplay flatcar is a 26 foot Litchfield car: "Type A" trucks. Two truss rods
BTW, note that the last two photos clearly show the brake cylinder pointed the wrong way, away from the brake staff / wheel.
Finally another South Park / C&S idiosyncrasy:
Note the diagonal end grab irons--they are consistently but asymmetrically placed on the car ends, the one on the left side of the end is always higher than the one on the right side of the end. True for the 27 foot UP built car on the distant left, and the 30 foot Peninsular car (no poling pockets) on the near right. Check out the end of your Robinson boxcar as well).
So I agree with Doug. It appears that the 27 foot UP built boxcars and the 27 foot Tiffany reefers never had truss rods.
On the other hand, the 27 foot coal cars, of both classes, not only had two truss rods, but were the first South Park cars to have queen posts on the needle beams (per Ron Rudnick).
Jim
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Case-of-the-Missing-Truss-Rods-Revisited-tp6387p6415.html
Well, Scotty, I will defer to the engineer . . .
But there is nothing about the additional photos that you posted that is inconsistent, you are merely mixing 26 foot Litchfield cars (truss rod under frames) with 27 foot UP built cars (no truss rod, but needle beam under frames).
The first boxcar on its side is a 27 foot UP built car: Remember Rudnick's Rule--note the square poling pockets on the sides of the corner irons, and the Heitkamp Convention --"type C" arch bar trucks (tall transom beams). No truss rods.
The second boxcar on side is a 26 foot Litchfield car: "Type A" trucks (short transom beams), ladder on car sides, no visible square poling pockets. Two truss rods.
Robinson boxcar end is of a 27 foot UP car: Corner irons bulge out to side for square poling pocket. End fascia underside is curved, a UP build feature. No truss rod bolt heads.
Buffalo boxcar end, 27 foot UP car: Square side poling pocket, "type-C" truck (tall transom beam), curved under edge to end fascia. No truss rod bolt head.
Fairplay boxcar is indeed a 27 foot UP built boxcar, as number 969 was the very last car built by the UP in the fall of 1883 (the Peninsular 30 foot cars began with number 970): Square side poling pockets, "type-C" truck (tall transom beam). Clearly no truss rods.
Fairplay flatcar is a 26 foot Litchfield car: "Type A" trucks. Two truss rods
BTW, note that the last two photos clearly show the brake cylinder pointed the wrong way, away from the brake staff / wheel.
Finally another South Park / C&S idiosyncrasy:
Note the diagonal end grab irons--they are consistently but asymmetrically placed on the car ends, the one on the left side of the end is always higher than the one on the right side of the end. True for the 27 foot UP built car on the distant left, and the 30 foot Peninsular car (no poling pockets) on the near right. Check out the end of your Robinson boxcar as well).
So I agree with Doug. It appears that the 27 foot UP built boxcars and the 27 foot Tiffany reefers never had truss rods.
On the other hand, the 27 foot coal cars, of both classes, not only had two truss rods, but were the first South Park cars to have queen posts on the needle beams (per Ron Rudnick).
Jim
Jim Courtney
Poulsbo, WA
Poulsbo, WA
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