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Re: Physics and Trains

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On 11/26/2015 11:30 AM, Lester Thorpe wrote:
> Is it better to pull or push a train?  Does it make a difference?
>
> In ordinary practice, trains are usually pulled, but sometimes
> they are pushed.  In the US, Amtrak passenger trains can be pushed
> for long distances at high speeds.
>
> I'd say it is better to pull a train because pushing increases greatly
> the likelihood of buckling of the column of cars.
>
> During motion, all train cars undergo "hunting oscillations," which are
> lateral movements, on the rails.  These oscillations means that the
> "column" of cars is almost never in perfect alignment and such a condition
> favors buckling.
>

going up or down a hill ?

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Physics and Trains Lester Thorpe <lt11@thorpe.info> - 2015-11-26 17:30 +0000
  Re: Physics and Trains gilber34 <fafa@invalid.com> - 2015-11-26 11:35 -0600
    Re: Physics and Trains Lester Thorpe <lt11@thorpe.info> - 2015-11-26 17:41 +0000
      Re: Physics and Trains gilber34 <fafa@invalid.com> - 2015-11-26 12:08 -0600
        Re: Physics and Trains Lester Thorpe <lt11@thorpe.info> - 2015-11-26 18:34 +0000
          Re: Physics and Trains Mahipal <mahipal7638@gmail.com> - 2015-11-26 11:45 -0800
            Re: Physics and Trains Lester Thorpe <lt11@thorpe.info> - 2015-11-26 20:02 +0000
          Re: Physics and Trains gilber34 <fafa@invalid.com> - 2015-11-29 19:58 -0600
            Re: Physics and Trains Timo <timo@physics.uq.edu.au> - 2015-11-30 14:57 -0800
  Re: Physics and Trains "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-11-26 10:00 -0800
  Re: Physics and Trains Timo <timo@physics.uq.edu.au> - 2015-11-29 17:51 -0800

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