A class and Lightweight rods
NW Mailing List
nw-mailing-list at nwhs.org
Fri Dec 11 15:32:09 EST 2009
Do you know the difference in cost between the last produced roller rod and
non-roller rod Class A's?
On Fri, Dec 11, 2009 at 12:09 PM, NW Mailing List
<nw-mailing-list at nwhs.org>wrote:
> The last five A's when built, numbers 1238-42, were equipped with the
> lightweight rods and reciprocating parts with roller bearing connections to
> enhance long distance running. They were very successful and were built
> primarly for troop train and passenger service, when needed.
> The Class J's were all equipped with this type of rods and bearings
> allowing them to be assigned to Roanoke and dispatched to Norfolk and
> Cincinnati on these runs with a minimum of servicing. The five A's could
> perform similarly on extended runs on troop and passenger service. Beginning
> in 1955 with the inauguration of time freights 77 and 78, these engines ran
> to Petersburg and back to Roanoke, and also between Roanoke and Portsmouth,
> without engine change.
> Official N&W literature stated that the Timken lightweight reciprocating
> parts resulted in a weight reduction of 38 percent from the original type
> used. The advantages listed was greater reliability, increased availability,
> lower roundhouse maintenance cost, reduction of hammer blow on the rails,
> and longer runs without lubrication servicing.
> The only other modification required was the counterweights on the driving
> wheels had to be changed. There was an increased cost to build these five
> A's when compared to the three A's built at the same time using conventional
> Bud Jeffries
> ----- Original Message ----- From: "NW Mailing List" <
> nw-mailing-list at nwhs.org>
> To: "NW Mailing List" <nw-mailing-list at nwhs.org>
> Sent: Friday, December 11, 2009 8:40 AM
> Subject: A class and Lightweight rods
> Were the lightweight rods applied to the last A's a successful
>> application? How was success measured and what was the business /
>> operational reason behind it?
>> What other changes to the locomotive were required to accomodate the rods?
>> Matt Goodman
>> Columbus OH
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