A class and Lightweight rods

[NW Mailing List]

Bud,

Do you know the difference in cost between the last produced roller rod and
non-roller rod Class A's?

Thanks,

John Rhodes

On Fri, Dec 11, 2009 at 12:09 PM, NW Mailing List
<nw-mailing-list at nwhs.org>wrote:


> Matt,

>

> 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

> rods.

>

> 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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