brian777999 Posted October 17, 2012 Share Posted October 17, 2012 I have a Hornby Pug which has a peculiar sideways rocking motion when in reverse. What causes this and how can it be fixed ? I am also puzzled that it is only apparent in one direction and not that obvious in the other direction. Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted October 17, 2012 Share Posted October 17, 2012 Dog knotted and trying to disengage? But seriously, you need to take a careful look at how the drive line components act in forward and reverse. RTR OO locos are not precision assemblies, and small inequities can easily show up more noticeably in one direction. Is it a regular rock, once per rotation of the wheels and always with the peaks of motion in the same position? If so, try taking the conecting rods off and see if it still happens as a first probe. Link to post Share on other sites More sharing options...
brian777999 Posted October 19, 2012 Author Share Posted October 19, 2012 I did try to edit the subtitle but the edit button no longer works. I am not sure why but there have been a lot of upgrades to RMWEB recently and I cannot get some things to work like they used to. Link to post Share on other sites More sharing options...
N15class Posted October 20, 2012 Share Posted October 20, 2012 I did try to edit the subtitle but the edit button no longer works. I am not sure why but there have been a lot of upgrades to RMWEB recently and I cannot get some things to work like they used to. To use the edit button on the first post use the right click button on the mouse. Link to post Share on other sites More sharing options...
brian777999 Posted October 20, 2012 Author Share Posted October 20, 2012 To use the edit button on the first post use the right click button on the mouse. No, that does not work. I have tried that many times. Link to post Share on other sites More sharing options...
daftbovine Posted October 20, 2012 Share Posted October 20, 2012 The rocking motion could be caused by the quartering of the wheels being out. I had a similar problem with a Hornby terrier that was eventually solved by replacing the wheels with new ones. I'm not sure you would need such a drastic solution, I'm sure other forum members will be able to give you more specific help. I have also found that some Hornby tank engines need quite a bit of running in and sometimes that is enough to improve matters. Regards Veronica Link to post Share on other sites More sharing options...
N15class Posted October 20, 2012 Share Posted October 20, 2012 Sorry to hear the right click won't offer the option to open, it works well with my opening posts. 0-4-0'S have tendancy to waddle because of the slack fit between the wheels and the track in oo gauge. Link to post Share on other sites More sharing options...
bluebottle Posted October 20, 2012 Share Posted October 20, 2012 0-4-0'S have tendancy to waddle because of the slack fit between the wheels and the track in oo gauge. The prototype locos also have a tendency to waddle; indeed I think they were so nicknamed because they resemble pug dogs in this respect! Link to post Share on other sites More sharing options...
Will L Posted October 23, 2012 Share Posted October 23, 2012 All steam engines with connected wheels tend to "box" because of the weight of the connecting rods etc. being driven going back and forward relative to the chassis. Outside cylinder loco's were worse than inside cylinder locos, and short wheel base 0-4-0s were worst of all. In this case what is true of the real thing is true for the model. So even a smooth running model will box a bit if you look carefully enough. The fact that yours does it more noticeably one way than the other suggests that the underlying tendency is being made worse by a stiffness in the motion. Will Link to post Share on other sites More sharing options...
Silver Sidelines Posted October 23, 2012 Share Posted October 23, 2012 My money would be on the quartering not being quite perfect. With a four coupled engine you can sometimes improve matter by nudging one of the wheels round a bit relative to the other wheel. This is perhaps how the Pug should . Regards Ray Link to post Share on other sites More sharing options...
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