Type C/UP trucks

Posted by Michael York on Apr 18, 2020; 3:28pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Type-C-UP-trucks-tp15497.html

Greetings,

First, I've enjoyed reading all the content on here for years...so thank you for posting!

I'm enjoying George's build logs, and he pointed me to some of the old threads here with nice photos of the Type C/UP trucks.  I did a bit of work on South Park, CC, and D&RG trucks a few years back: I printed the CC and early D&RG trucks in 1:20.3, as well as the Type A/Litchfield trucks in On3.  I found a a draft version of the Type C/UP trucks from August 2013, so perhaps I should finish the design and make them available.

Here's where I would appreciate a little help...the photo enhancements posted on here reveal detail which I feel like I should incorporate into my trucks.

I feel like I need to shrink the journal lids and maybe increase the distance between the truck transoms.  I should probably improve the detail on the transom castings (the little plates in between the transoms which have the circular hole).  I'm not sure why the bolster looks like it does...my best guess is that I did that for alignment with the side bearings.

The wheelbase for these is 4'.  I designed them to use the Grandt Line axles, although a redesign for the SJCC needle axles may be in order.




I do have a very strong preference for 3D printed trucks due to the detail level obtainable, the flexibility of the material, and the rolling properties.  You just don't want to drop them on the floor when using metal wheelsets.  If anyone wants Sn3 or HOn3 versions, just let me know the axle length, diameter, and shoulder vs pointed...and I can figure out if it is a reasonable level of effort for me to rescale it (printing limitations).  I need the On3 version for 2-3 cars which have been sitting on my workbench for 10 years...one of which had scratchbuilt styrene trucks which got smashed...