Class A sheathed smokebox.

[NW Mailing List]

Vic

Here is a quick example of what we are talking about.

Two views from our Archives. Top is 1218 in regular service, bottom is 1239 in regular service. Notice the arrow pointing to the end of the jacketing on 1239.


The thing I believe you are seeing is something N&W to my knowledge, never head, a “Coffin” feedwater heater, show on this image I found on the internet.

Best
Ken Miller

> On Feb 4, 2023, at 6:08 PM, NW Mailing List <nw-mailing-list at nwhs.org> wrote:
> 
> Larry,
> 
> Thanks for the explanation.  I can understand the concept.  I have seen a few photos of steam locomotives with a “U” shaped extension over the smokebox.  Is this what it would look like?  Are there any photos of the “A” or “Y” with this feature?
> 
>  
> 
> Vic Chudoba
> 
>  
> 
> From: NW-Mailing-List <nw-mailing-list-bounces at nwhs.org> On Behalf Of NW Mailing List
> Sent: Sunday, February 5, 2023 5:23 AM
> To: 'NW Mailing List' <nw-mailing-list at nwhs.org>
> Subject: RE: Class A sheathed smokebox.
> 
>  
> 
> Viv
> 
>     It’s just an extension of the lagging and boiler jacket out and over the smokebox . I not sure what the N&W reasoning was for sure . Quit a few of the Y class got
> 
> The same treatment , I was on the C&O 1309 crew we insulated the smokebox  that never was when in service. It helps with expansion and contraction  of the front tube sheet retaining heat so you get slower cooling . I am sure it helped on the feed water system  also on the” A” .  I am no expert but all the heat you can retained in a boiler is a good thing
> 
>  
> 
>  
> 
> Larry Evans
> 
>      
> 
>  
> 
> From: NW-Mailing-List [mailto:nw-mailing-list-bounces at nwhs.org] On Behalf Of NW Mailing List
> Sent: Saturday, February 04, 2023 2:36 AM
> To: 'NW Mailing List' <nw-mailing-list at nwhs.org>
> Subject: RE: Class A sheathed smokebox.
> 
>  
> 
> Please forgive my ignorance and teach me what a “sheathed” smokebox is and its purpose, as well as how to know from a photo if it was installed.  Thank you!
> 
>  
> 
> Vic Chudoba
> 
>  
> 
> From: NW-Mailing-List <nw-mailing-list-bounces at nwhs.org> On Behalf Of NW Mailing List
> Sent: Friday, February 3, 2023 12:01 AM
> To: 'NW Mailing List' <nw-mailing-list at nwhs.org>
> Subject: RE: Class A sheathed smokebox.
> 
>  
> 
> Jimmy
> 
> Best I can do  1213,1214,1217,1218
> 
>  
> 
> Larry Evans
> 
>  
> 
> From: NW-Mailing-List [mailto:nw-mailing-list-bounces at nwhs.org] On Behalf Of NW Mailing List
> Sent: Wednesday, February 01, 2023 2:51 PM
> To: NW Mailing List <nw-mailing-list at nwhs.org>
> Subject: Class A sheathed smokebox.
> 
>  
> 
> Does anyone know how many/what numbered Class A locos received the sheathed smokebox?
> 
>  
> 
> Jimmy Lisle
> 
>  
> 
>  
> 
>  
> 
> Sent from my Verizon, Samsung Galaxy smartphone
> 
>  
> 
>  
> 
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