LMB, Sunset, Key and Tenshodo have all made the 9000 series Union Pacific 4-12-2. The last run from Key is one of the best and most accurate models made, but it was seventeen hundred list a couple of years ago.
The Sunset 4-12-2 show up on Ebay and at shops used for about $500 or so. If you have to ask what the Key or Tenshodo’s would cost today, you probably don’t want one of those.
I spoke with an owner of the Kohs’ O scale 4-12-2. He said it needs at least a 120 radius curve! And easements really help it get through that!
However, a Kohs brass locomotive is truly a work of art, (even though some have commented the boiler taper is off on this one) as well as one of the best running makes out there.
I could be wrong I am sometimes but I think the only flanged drivers are the front and rear set so BLI might not have to do anyting but put really wide tires on one
I think–and I could be wrong on this–that the center (3rd) driver on the 4-12-2 was blank. I know that the Sunset brass model requires about a 32" minimum radius, and works much better on at least a 34".
Saw one on e-bay a week or two ago going for between $6-700 if memory serves me correctly. Don’t know if it was sold or not. The 32" radius curves suprised me as I know Brass 2-10-4’s require 30"+ radius.
The Sunset 4-12-2 came with an alternate ‘blank’ 3rd driver for squeezing by on a 32" radius and has quite a bit of side-play on the other drivers. I’m with you on long-wheelbased non-articulateds, though. My PSC Rio Grande 2-10-2 is recommended for nothing under a 32" radius. Luckily my smallest radius is 34", but even then it seems happier on my 36". Frankly, I couldn’t imagine running a 4-12-2 on the Yuba River Sub, even with my more generous curves.
A minor point, but #9000 (the first one) was delivered with a blind #3 & #4 driver set. Very soon after delivery, the #3 driver set was changed to flanged. I don’t believe the #4 set was ever converted to flanged–a visit to the LA County fairgrounds to visit #9000 would clear that up. All the other 4-12-2’s were “all flanged all the time”.
This information was obtained from Kratville’s “The Union Pacific Type”.