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Discussion Boards => N => Topic started by: kcs114 on June 21, 2018, 10:59:41 AM



Title: N scale Spectrum 2-8-0 binds - downhill only
Post by: kcs114 on June 21, 2018, 10:59:41 AM
I have a first generation Spectrum N scale 2-8-0 that runs like a Swiss watch on the level and uphill. But going downhill with ten cars and a caboose behind it, it has a very jerky motion that must be a bind because it is in sync with each revolution of the wheels. When I put it on Bachrus rollers or upside down in a cradle, there is no bind. I checked the clearances in the rods and valve gear, and they appear to be OK. The fact that this only happens when going downhill, especially on my steeper (3.85%) grades has me stumped.


Title: Re: N scale Spectrum 2-8-0 binds - downhill only
Post by: hminky on June 21, 2018, 11:46:59 AM
I have a first generation Spectrum N scale 2-8-0 that runs like a Swiss watch on the level and uphill. But going downhill with ten cars and a caboose behind it, it has a very jerky motion that must be a bind because it is in sync with each revolution of the wheels. When I put it on Bachrus rollers or upside down in a cradle, there is no bind. I checked the clearances in the rods and valve gear, and they appear to be OK. The fact that this only happens when going downhill, especially on my steeper (3.85%) grades has me stumped.
Yeah, that is what worm geared steam locomotives do going downhill.

Always have always will.

Harold