Yards - Switching

[nw-mailing-list at nwhs.org]

Harry,

At these 2 facilites generally how long and high where the humps?

What motive power was used?
How many cars where in the string to be humped,max ?
Not all the cars where actually on the hump at anyone time, untill closer to
the end right?

thanks for the info,
John Rhodes

On 9/17/06, nw-mailing-list at nwhs.org <nw-mailing-list at nwhs.org> wrote:

>

>  John:

>

> I suspect the height and grades in a hump yard are determined by

> length of bowl tracks and tracks in the bowl.   The mountain at

> Bellevue certainly was higher than the pimple at the Portsmouth

> time freight hump, but Bellevue had more bowl tracks.  Bellevue

> had computerized car retardation and Portsmouth did it with a

> car retarder operator.  At Bellevue, a hump engine pushed the cars

> to the apex and bowl crews pulled the classified cars from the

> opposite end.  At Portsmouth, the same crew that humped them,

> also pulled them out of the bowl.   Despite the computerization and

> the army of clerks that staffed the Bellevue hump, the Portsmouth

> time freight hump was just as efficient.  Just don't pull the antics

> that Bison Yard did.  The pin-puller uncoupled a cut of 10 liquid

> sugar tanks.  The cut went through the designated track and were

> last seen en route to Canada.

>                                                      Harry Bundy

>

> ________________________________________

> NW-Mailing-List at nwhs.org

> To change your subscription go to

> http://list.nwhs.org/mailman/options/nw-mailing-list

>

>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://six.pairlist.net/pipermail/nw-mailing-list/attachments/20060917/6eb910b2/attachment.html