Subject:
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Speed surges
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 20 Feb 2000 02:24:08 GMT
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Reply-To:
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lpieniazek@NOMORESPAMnovera.com
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Viewed:
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839 times
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Recent "big loco" and "big car" projects by others have started me
thinking about speed surges and wondering if there is a relation.
I notice that my longer locos and longer (car length and number of cars)
trains experience high frequency oscillations in speed and I am really
starting to bcome convinced that it's due to the changes in length of
the train between when you are on a curve and when you're on a straight
Take Mike's AX that he just posted. There must be a least a 5 stud
difference that the two trucks need to make up/absorb when switching
from a curve to a straight and back, due to the chordal distance from
one pivot point remaining fixed, but the track distance (and thus the
distance the trucks travel) changing from a straight where they are the
same, to a curve where the chordal distance and the circumferential
distance being significantly different.
Any ME's in the audience? Am I all wet?
--
Larry Pieniazek - lpieniazek@mercator.com - http://my.voyager.net/lar
http://www.mercator.com. Mercator, the e-business transformation company
fund Lugnet(tm): http://www.ebates.com/ ref: lar, 1/2 $$ to lugnet.
Note: this is a family forum!
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Message has 1 Reply:
 | | Re: Speed surges
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| I've noticed this as well. At the GATS show today, I asked others to observe it just to make sure it isn't just me. I notice it mostly when the train goes through an s-curve. The front of the train doesn't surge, but the back does. I think Larry is (...) (25 years ago, 20-Feb-00, to lugnet.trains)
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