Subject:
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Re: Train engine transmission
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 1 Mar 2000 20:10:34 GMT
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Viewed:
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1490 times
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> Modern
> locomotives (which are not Diesel for the most part, they are usually
> turbines, if you stand next to one as it winds up, and don't realize
> that they use turbines, you may start looking for the airplane...)
I'd _love_ to see that engine...all you are hearing is the Turbocharger for the
Diesel engine spooling up...which, is in effect, a turbine, but it is not
powering the train :) The last Turbine powered engines were the UP's 8500HP
monsters, and they have been gone for quite a while now.
> One place where you can really hear the results of the fact that
> differentials are not used in trains is on subway lines, especially in
> the Park Street station on the Boston MBTA. There is a reversing loop
> there which can't be much more than a 100 foot radius curve, and boy do
> the trains squeal going around it.
You don't need to have a differenctial in a train, because the angle on the
wheels works with the track to give a differencial effect, as long as the curve
radius is a normal railway radius :) Subways are something different, in a lot
of ways. I know of _model_ engines that wouldn't make it around a 100' radius
curve...ours didn't like less than 45' radius.
James Powell
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Message is in Reply To:
 | | Re: Train engine transmission
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| (...) I can't answer everything here, but will spit out some information... The rod coupling works very well with steam engines for the reasons you surmised. The flexing issues due to curves and bumps are almost nil. This is not the case in (...) (25 years ago, 1-Mar-00, to lugnet.trains)
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