Nice work Bill. It's a very clever fix, although it goes against my philosophy. If it worked well before I touched it, it probably wouldn't afterward. As I get older, it becomes a challenge to put a sandwich together the way I want it :o) Ed Koz Sanford, Maine
Bill Lane <[EMAIL PROTECTED]> wrote: HI All, I decided to get my 2 Omnicon PRR I1 put of the box and get them prepped for painting. For me that is usually a very long involved process of detailing and customizing. But this time I am really trying to keep the brass bashing to a minimum in order to get them really completed in the about 1 month window I have before school starts again. My I1 and some of the other PRR engines were made by Samhongsa in the mid 80s to the early 1990s. They have the free rolling gearbox which makes them run incredibly well. A new never run K4 won the all scales performance contest right out of the box at a NMRA National convention shortly after they were released. But I have never really been a fan of the free rolling gearbox. 1 of my K4 almost ran away form me on a grade. I have had an idea how the gearbox works for years but was hesitant until now to poke my head in there to really take a look. I wanted to figure out how to disable the free rolling gearbox without sacrificing the great running capabilities. After WAY too much time spent, I finally got it figured out. http://www.lanestrains.com/Samhongsa_Gearbox.jpg The worm gear is obviously missing in the top of the gearbox. I custom made a threaded bushing to replace 1 of the gears on the rocker arm. There was a high loss rate when making the bushing because it is rather small and had to be pretty precise. My Unimats are passable on a good day, but are not overly true and accurate. My fix is completely adjustable to engage the gears properly, and can be done with the drive running. The 2-56 screw is grooved to turn in the hole I drilled in the gearbox housing. In the small test I made, I am convinced the screw will not rotate and loose adjustment. But the best part of it is, with the exception of the 1 small hole I drilled, the gearbox can very easily be reverted back to the free rolling drive by replacing the gear I removed. It is a little complex in one respect, but rather simple in another. The original time consumption was figuring out how to mount the 2-56 screw outside the gearbox without taking up lots of space, and have the screw pivot with the angle change as it is adjusted. The grooved screw is just what was needed. I just thought I would share my little fix here. I am pretty happy with the whole thing. Thank You, Bill Lane Modeling the Mighty Pennsy & PRSL in 1957 in S Scale since 1988 See my finished models at: http://www.lanestrains.com Winner of the 2007 Josh Seltzer NASG Website Award Look at what has been made in PRR in S Scale! Importing a Brass S Scale PRR X29 & G26 http://www.pennsysmodels.com PRR Builders Photos Bought, Sold & Traded (Trading is MUCH preferred) http://www.lanestrains.com/PRRphotos.xls ***Join the PRR T&HS*** The other members are not ALL like me! http://www.prrths.com http://www.lanestrains.com/PRRTHS_Application.pdf Join the Pennsylvania Reading Seashore Lines Historical Society It's FREE (for now) http://www.prslhs.com Preserving The Memory Of The PRSL See my Altoona train videos here http://www.myspace.com/billlane No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.9/1197 - Release Date: 12/25/2007 8:04 PM Yahoo! Groups Links [Non-text portions of this message have been removed] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
