Re: Type C/UP trucks
Posted by Michael York on Jun 24, 2021; 4:10pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Type-C-UP-trucks-tp15497p16788.html
Here are the revisions:
1. Arch and tie bars are now 1.25" thick in S scale (0.020"), but the tie bar and the angled portion of the top arch bar have a triangular cross section which is 1.5" thick in S Scale (0.024"), with the extra width added on the bottom.
2. The space between the journals was 0.73" with a gap that made it 0.75" in the middle, now they are 0.77" apart.
3. The wire mounts for the brake beams are closer together, now 0.25" center to center
4. Grooves widened by 0.01" each way.
5. The transoms are now full width and have the mounting holes in a flange which is in-line with the brake beams. Previously, the transoms were reduced width to minimize the material costs of the trucks. In O-scale, swing motion trucks eat up 2-3x as much material as rigid thanks to the transoms.
Michael
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Type-C-UP-trucks-tp15497p16788.html
Here are the revisions:
1. Arch and tie bars are now 1.25" thick in S scale (0.020"), but the tie bar and the angled portion of the top arch bar have a triangular cross section which is 1.5" thick in S Scale (0.024"), with the extra width added on the bottom.
2. The space between the journals was 0.73" with a gap that made it 0.75" in the middle, now they are 0.77" apart.
3. The wire mounts for the brake beams are closer together, now 0.25" center to center
4. Grooves widened by 0.01" each way.
5. The transoms are now full width and have the mounting holes in a flange which is in-line with the brake beams. Previously, the transoms were reduced width to minimize the material costs of the trucks. In O-scale, swing motion trucks eat up 2-3x as much material as rigid thanks to the transoms.
Michael
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