odd photo

[NW Mailing List]

Lynn:
 
Please re-read Prince's book.  The Z1s, a and b, (not "L") were ALL  
compound engines.  The Z1 and Z1a were built with slide-valve low pressure  
cylinders.  Those rebuilt to Z1b got piston valve low pressure cylinders;  there 
may have been other improvements, too, but others more knowledgeable about  
such details can fill that in.
 
There was one (1) fully simple Z, class Z2, No. 1399.
 
This link http://www.steamlocomotive.com/2-6-6-2/?page=nw is  helpful.
 
Dave Phelps
 
 
In a message dated 5/17/2015 8:08:42 A.M. Eastern Daylight Time,  
nw-mailing-list at nwhs.org writes:

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_ 
(mailto:nw-mailing-list-request at nwhs.org)   wrote:


Subject:  
Re: odd photo   
From: 
NW  Mailing List _<nw-mailing-list at nwhs.org>_ 
(mailto:nw-mailing-list at nwhs.org)    
Date:  
5/15/2015 9:23 PM     
To: 
"NW  Mailing List" _<nw-mailing-list at nwhs.org>_ 
(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_ 
(mailto:nw-mailing-list at nwhs.org)  
Sent: Friday, May 15, 2015 2:51 PM
To: _nw-mailing-list at nwhs.org_ (mailto:nw-mailing-list at nwhs.org)  
Cc: _NW Mailing  List_ (mailto:nw-mailing-list at nwhs.org)  
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_ (mailto: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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