davey
Active Member
Posts: 25
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Post by davey on Mar 26, 2014 17:10:10 GMT
Hi
hope someone can help, i have at long last got my winson 1400 running, well sort off. I keep having derailments, all at low speed on gentle bends, the front just rolls over the track and im off. Springing is correct and the loco sits level, there is sideways play on the back axle. Any ideas?
thanks in advance
Dave
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Post by Deleted on Mar 26, 2014 19:20:49 GMT
Incorrect wheel profile? Wheels too tight on the gauge? - can you move the wheelsets from side to side on the track? There should be some play between the wheel flanges and the rails.
John
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pault
Elder Statesman
Posts: 1,494
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Post by pault on Mar 26, 2014 19:36:40 GMT
When you say springing is correct what do you mean?
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davey
Active Member
Posts: 25
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Post by davey on Mar 27, 2014 11:28:48 GMT
I can move the wheels side to side, and the profiles are per winson, it may be a tiny bit tight when sitting on track.
when the loco sits on the track it is level front to back, springs are adjusted to give free movement in all up/down directions, the loco has been looked at by experienced club members and they are happy with springing. we are all at a bit of a loss as there seems to be no 1 clear problem.
regards
D
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Post by Deleted on Mar 27, 2014 11:55:52 GMT
The Winson/Modelworks A4 did have problems with the wheel profiles, although I haven't heard of any such problems with the 1400. What about the coupling to the driving trolley? Could it be restricting sideways movement, or pulling the rear of the loco down and taking weight off the front wheels?
Regards, John
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Post by gwr14xx on Apr 29, 2014 10:12:30 GMT
Dave,
I bought a 14XX about 18 months ago and was not too happy with the way it 'nodded it's head' when under way. I resorted to removing two tufnol leaves from the trailing axle springs and replaced them with spring steel. This transferred more weight to the leading axle and made the loco much more stable.
Eddie.
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jma1009
Elder Statesman
Posts: 5,884
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Post by jma1009 on Apr 29, 2014 10:19:31 GMT
hi eddie,
i am not sure of the logic of what you did - by making the trailing springs stiffer you are making the problem worse. i would have stiffened the front springs instead.
cheers,
julian
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Post by gwr14xx on Apr 29, 2014 19:22:16 GMT
Julian,
If too much weight is being carried on the centre of the three axles, there will be a tendency to rock fore and aft on that axle. Stiffening the springing on the rear axle makes that axle and the leading axle share a greater percentage of the weight (with less weight on the trailing drivers) - thus giving the leading axle a better chance of steering the loco around the bends. When purchased, my 14XX had a nose up attitude and stiffening the rear springs also cured that.
Eddie.
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