M-2c Class Details

Mon Jan 18 21:46:36 EST 2016

Roger -

If you Google the Hobart-Alfree cylinders, you’ll find that they were incorporated a second valve supposedly to give a quicker admission of steam to the cylinder and quicker exhaust.  There was a slide-valve version called the Allfree-Hubble valve which was used on one class W engine; I believe it was reclassed as W-3 and didn’t last very long (the lone W-4 engine was equipped with Walschaerts valve gear and I’d love to see a photo of it).  The Pacifics equipped with the H-A cylinders had their valve gear arranged differently from the rest; the combination lever was hung from the valve stem instead of the Baker bell crank.

EdK 

From: NW Mailing List via NW-Mailing-List 
Sent: Monday, January 18, 2016 5:07 PM
To: NW Mailing List 
Cc: NW Mailing List 
Subject: Re: M-2c Class Details

Thanks, Ed.

I have seen mention of the Hobart-Allfree cylinders before but I don't know what they are or if they have distinguishing features I can spot. Some M & M-2 engines (as well as Pacifics) have the steam pipes on the outside and some not visible on the top of the cylinders. Is that what you are talking about?

I have a PSC HO M-2c that is factory painted as 1157. It has unported cylinders, single stoker engine, BL heater and with a 9A tender. I guess it's modeled after how it looked early on as it has the high N&W number board type headlight and road pilot.

The Sunset models all have the ported cylinders, single stoker engines, BL heaters, high Pyle headlights, footboard pilots and 12A tenders.

Most photos I have found of the 1151-1160 engines show the ported cylinders but most all are engineer side views so I don't know about the BL heaters. 

Naturally, details come and go over the years as I have some pictures of engines with and without the ported cylinders or BLs and most have tenders, pilots and headlight styles & locations changed throughout the years.

Many thanks for answering my questions.

Roger Huber

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From: NW Mailing List <nw-mailing-list at nwhs.org>
To: NW Mailing List <nw-mailing-list at nwhs.org> 
Sent: Monday, January 18, 2016 8:41 AM
Subject: Re: M-2c Class Details

Roger - 

The M-2 engines with the Walschaerts valve gear were the fifty original Baldwins of 1910 numbered 1100-1149.  Roanoke built eleven more numbered 1150-1160 variously classed as M-2a, M-2b and M-2c.  These engines all had Baker Valve Gear and the subclasses had either Hobart-Allfree cylinders (M-2a) and/or stokers and/or superheaters.  Eventually they were all changed to the M-2c standard of stokers and superheaters, the Hobart-Allfree experiment also seen on the E-2b Pacifics was given up.  There is a photo of the left side of 1157 in the book on the N&W class A and there were several photos of the 1100s in the Thieme picture book.  All the M-2s were eventually equipped with superheaters and stokers.  I don’t know if all the M-2s got feedwater heaters.  The bulge on the side of the cylinders was a form of drifting relief valve.  The single cylinder stoker engine was for a Duplex stoker; most of those were taken off in favor of the Standard stokers with the two cylinders; the 1157 is so equipped.

Hope this helps.

EdKing

From: NW Mailing List via NW-Mailing-List 
Sent: Sunday, January 17, 2016 11:45 AM
To: mailto:nw-mailing-list at nwhs.org
Cc: NW Mailing List 
Subject: M-2c Class Details

Hi, Guys!

Can someone enlighten me as to some differences in the M-2c locomotives? The Sunset HO import has Baker valve gear, BL feedwater heater, single cylinder stoker motor and those odd cylinders with the port on the side between the piston and valve chambers. What was that for?

Which engines do these models represent. I haven't found a picture of the fireman's side of a Baker engine yet. Seems most M-2 engines had Walschaerts vg. I'd like to paint and letter them as specific engines with correct details.

Any help would be greatly appreciated!

Thanks,
Roger Huber
Deer Creek Locomotive Works

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