I just installed Rodney Eddington's gearbox between the factory Pittman motor and the existing Bachmann gearbox on my K-27 #455. I also added some lead to the engine. At full voltage, (19 volts), the engine moves along at just over half of it's original speed. At 14 volts, (the voltage I intend to use to RC/battery control), the speed is much more realistic with way better torque. It will pull 10 cars up a curving 4% grade barely slowing. It's more like starting up in 1st gear instead of 3rd gear. Before the conversion the engine would slow way down on even modest curves and then would take off like a rocket on the straight track. Now only minor voltage changes are needed if at all to control the speed. With this new gearbox the engine runs very smooth with only slight gear noise. I uploaded a video to Youtube from my phone. The noise you can hear is from a plane that I didn't notice while I was shooting the clip.
http://www.youtube.com/watch?v=bGENcVgSbv0
If anyone is interested in this modification Rodney Eddington can be contacted at:
http://www.randkrailroadproducts.com/
I know that Rodney has been working on this project for two years and I am really happy to have a solution for the gear ratio problem. This brings the ratio close to what I think Bachmann originally intended. The K-27 is such a beautiful engine. I think this gearbox will help the K-27 to run as good as it looks.
John Lyans
http://www.youtube.com/watch?v=bGENcVgSbv0
If anyone is interested in this modification Rodney Eddington can be contacted at:
http://www.randkrailroadproducts.com/
I know that Rodney has been working on this project for two years and I am really happy to have a solution for the gear ratio problem. This brings the ratio close to what I think Bachmann originally intended. The K-27 is such a beautiful engine. I think this gearbox will help the K-27 to run as good as it looks.
John Lyans