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Post by britannia on Sept 11, 2021 16:51:50 GMT
Sitting on the tender when driving is great fun, but wear on the wheels ultimately comes to haunt you - with a derailment. I have turned a new set of wheels but have run into a few interesting dimensional issues when placing them on the original axles, which are not exactly the same as DY's design (which they should be). In trying to work things out, it raises the question of how much side play there should be between the axle boxes and wheels. Any views?
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Post by keith1500 on Sept 12, 2021 20:17:29 GMT
I had a similar dilemma with my LMS milk tank. In the end the problem isn’t as difficult as you might think. My approach was to have a small amount of end float on the two outer axles, say 10 thou or so. Then use a cord formula as used in a circle, Search Sagitta, to find the end float of the middle axle. en.m.wikipedia.org/wiki/Sagitta_(geometry)You can decide what is the tightest radius bend you’ll encounter and run the calc to give the end float of the middle axial for a bend, which times 2 will be your end float. Keith |
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Post by ejparrott on Sept 12, 2021 20:20:57 GMT
Outer axles just a running clearance, 2 thou a side should be ample. Middle axle 20-25thou tops
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Post by 92220 on Oct 9, 2021 8:32:20 GMT
Outer axles just a running clearance, 2 thou a side should be ample. Middle axle 20-25thou tops Yes. That's what I have done. Bob. |
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Post by britannia on Oct 12, 2021 18:46:02 GMT
Thanks guys for sound advice which I have now implemented - seems to work well. Just need to make a note to have the tender off the track each year for inspection. The loco and tender normally sit in an engine shed/workshop, and roll straight out onto the line.
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