Been there, done that leaving a mine in Sesser, Illinois with 103 cars
of metallurgical grade coal.
Regards,  Bob S.

On Tue, May 26, 2009 at 9:18 AM, Graydon <[email protected]> wrote:
> On Tue, May 26, 2009 at 03:21:21PM +1000, Anthony Farr scripsit:
>> > Try about 100,000-150,000 tons of coal per train. 100-150 cars at 100
>> > tons each, not 100,000 tons each.
>> >
>> > --
>> > M. Adam Maas
>>
>> 100,000 ton trains are anything but common.  I searched about and
>> found this at a number of sources:
>> http://www.youtube.com/watch?v=bU_3KfdG3fk
>>
>> Weight:  99,732 tonnes (109,935.711 US short tons, 98,156.885 UK long tons)
>> Length:   7.35 km (4.57 miles)
>
> The fundamental limits on train size are engine traction and drawbar
> strength.
>
> Remember that when starting the train, at some point the engine to first
> car drawbar has the entire mass of the train on it; this turns out to be
> more of an issue than engine traction.  Past a certain size, you get an
> awful ping noise as a drawbar breaks, and then you have *two* trains.
>
> -- Graydon
>
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