Re: Helper LocomotivesAIL

Msg # 996 of 1000 on RelayNet Trains/models/railways etc
To: ALL, From: BARNACLE BILL THE SAILOR
Time: Monday, 8-13-7, 2:05
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--- UseNet To RIME Gateway @ 8/13/07 1:43:11 PM ---

James Robinson wrote:
> mojaveg@mojaveg.lsan.mdsg-pacwest.com (Everett M. Greene) wrote:
>> James Robinson  writes:
>>> "wa-kiki"  wrote:
>>>
>>>> I've seen it in prototype operation and I've seen it on film where
>>>> a locomotive will be put somewhere in the middle of a train to help
>>>> move a really heavy load such as a coal unit train. But can someone
>>>> tell me how this actually works.
>>> It all depends on how many locomotives are used as helpers, and where
>>> they are placed in the train.
>
>   < snip >
>
>> Seems like a good description in an idealized situation.  Since
>> the rail lines are almost never completely consistent grades,
>> the neutral point will fluctuate as the grade varies.  I've seen
>> descriptions of operations where the front units will be braking
>> while the more rearward units will still be pushing/pulling at
>> full bore as a long train goes over a hill.  So there is some
>> art to getting the power balance correct at any moment.
>
> ........  Control of slack is an art................hallelujah brother! Do
testify!



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