Challengers and coal

[NW Modeling List]

The proportions of 'burnable carbon' and inert material vary considerably depending on the source of the coal.
The UP needed a higher firing rate with their lower quality coal to attain performance.  In general; UP coal
would produce more ash; require more air; and increase build-up in the hot side of the boiler tubes and flues.
With better coal, the Clinchfield was able to maintain draft with a single stack.
 
Jerome Crosson.




-----Original Message-----
From: NW Modeling List <nw-modeling-list at nwhs.org>
To: NW Modeling List <nw-modeling-list at nwhs.org>
Sent: Wed, Feb 24, 2010 12:12 pm
Subject: Re: Challengers and coal




Not to sound stupid but what would be a "better" coal to use? Isn't the majority  
of coal deposits in the US  bituminous coal? 
 
Thanks 
Jon Kelley 
 
Sent on the Sprint® Now Network from my BlackBerry® 
 
-----Original Message----- 
From: NW Modeling List <nw-modeling-list at nwhs.org> 
Date: Wed, 24 Feb 2010 11:41:15  
To: 'NW Modeling List'<nw-modeling-list at nwhs.org> 
Subject: RE: Challengers and coal 
 
Maybe related and maybe not, but the Clinchfield did change the way the UP  
Challengers were drafted (i.e., single stack replacing double stack)    Jim  
Nichols 
 
I would guess 

> that better coal would make the Challenger steam easier. 

> The implication is 

> that it would increase the effective output. (as opposed to 

> theoretical 

> output)      Jim 

> Nichols 

=============== 
 
Trying to keep this on the lite side, I believe the Challengers Clinchfield got  
from D&RGW were of the same design as the last UP Challengers, so they must have  
run on some decent coal on CRR. ;-) 
 
Mark Peele 
Catonsville, MD 
 
 
 
 
       
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