odd photo

[NW Mailing List]

Lynn – 

You are laboring under a couple of misconceptions, here.  First, the N&W obtained 190 locomotives in classes Z-1 (not L) and Z-1a.   These were the railway’s front-line heavy freight power all through World War I.  They were NOT simple engines – they were all compounds.  The front cylinders were equipped with slide valves.

One of these engines was converted to be a simple articulated; it was the 1399, reclassed Z-2.  It was not successful.

Seventy-four Z-1as were converted to class Z-1b by the replacement of their front cylinders with inside-admission piston valve cylinders; they also received Worthington BL feedwater heaters.  These were excellent locomotives, but not in a weight or power class with the 2-8-8-2s.

Several Z-1as received piston-valve low pressure cylinders to replace the originals, for various reasons.  These can be distinguished from the Z-1bs in that none received the Worthington feedwater heaters.

The N&W never owned but 44 simple articulateds – the above-mentioned 1399 and the 43 class A 2-6-6-4s.

EdKing



From: NW Mailing List 
Sent: Saturday, May 16, 2015 10:53 PM
To: nw-mailing-list at nwhs.org 
Subject: Re: odd photo

I can verify reading princes book 1331 is the lowest numbered engine to get the treatment from an L1a to an L1b. N&W is no stranger to reworking their engines, The point is about the L1b it has low pressure front cylinders, while the L1a is basically a full simple engine.
This is about grinding on the mountains to move that coal at low speed. The simple engines could move faster. The reason why is the larger cylinders at higher speed cause reverse pressures which does not work well for higher speeds, but low speeds are fine, why the Y class compound development, drag that freight over them mountains.
N&W could probably pick and choose the best engines in condition to take the modification and last many more years, and that they did with all of their steam lineup, but again other lower end steamers met the scrappers torch while steam technology advanced.  The Roanoke shops were very talented keeping the steam fleet alive why many of the older engines lasted to the end. M2c's built in 1917 still working in 1958? wotta run.

-Lynn-


On 5/16/2015 7:30 AM, nw-mailing-list-request at nwhs.org wrote:

        Subject: Re: odd photo 
        From: NW Mailing List mailto:nw-mailing-list at nwhs.org 
        Date: 5/15/2015 9:23 PM 
        To: "NW Mailing List" mailto:nw-mailing-list at nwhs.org 


  yabbut the 1333 and 1334 didn’t last to the end like the 1331 and 1339 did . . .

  EdK

  From: NW Mailing List via NW-Mailing-List 
  Sent: Friday, May 15, 2015 2:51 PM
  To: nw-mailing-list at nwhs.org 
  Cc: NW Mailing List 
  Subject: Re: odd photo

  Ed, http://nwhs.org/data/steam/ says 1333 and 1334 were also converted, 07-1930 and 12-1929 respectively, not that it's a big deal...

  Dave Phelps

  In a message dated 5/15/2015 2:43:26 P.M. Eastern Daylight Time, nw-mailing-list at nwhs.org writes:
    Yep, it was the lowest-numbered 2-6-6-2 to be converted.  Since it was one of the second order of the 2-6-6-2s, one wonders what drove the decision not to convert a lower numbered engine.  Luck of the draw, perhaps; the 1331 and 1339 were the only two converted out of the order that covered the 1315-1339.

    All you who guessed right, you win the prizes; go buy yourselves a drink.

    EK





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