Re: B&O m-15k & M-15n


Brian Carlson
 

Thanks Chris. I absentmindedly forgot about the RPC.

 I’m pondering if I can create a M-15N from the F&C M—15k with a new underframe. I fear the resin thickness might be an issue 

Brian J. Carlson 

On May 8, 2022, at 6:51 AM, Chris Barkan <cplbarkan@...> wrote:

Following is a brief synopsis of the B&O's M-15 rebuilding programs.

The M-15K/L/M subclasses were rebuilt 1936, 1937, and 1939, using steel underframes from M-15 double-sheathed boxcars by replacing the wooden body with steel, wagontop bodies.
     M-15K, 1,240 cars rebuilt 1936-37 as single door wagontop cars 370000-371249 with an inside height of 10’0”.
     M-15L, 50 cars rebuilt 1937. Double door version of wagontop M-15 rebuild. 379000-370049 with inside height 10’0”. 
     M-15M, 180 cars rebuilt 1939.  These were extended height, double door wagontops in series 294000-294179 with an inside height of 10’4” and equipped with Evans auto loaders.
 
All of the M-15K and M-15L wagontop rebuilds had their fishbelly underframes replaced in the mid-1950s and were reclassified as M-15N, M-15NA, M-15NB, M-15P dependent on the combination of door width, capacity and which class they were rebuilt from.
     M-15N  400 cars (from M-15K) received new UFs in 1955 and renumbered 374000-374399, 40 ton capacity, 6 foot doors.
     M-15NA  376 cars (from M-15K) received new UFs in 1956 and renumbered 374500-374875, 40 ton capacity, 8 foot doors.
     M-15NB  47 cars (from M-15L) received new UFs in 1956 and renumbered 374900-374946, 40 ton capacity, 8 foot doors.
     M-15P  400 cars (from M-15K) received new UFs in 1955 and renumbered 375000-375399, 50 ton capacity, 6 foot doors.
     M-15PD  309 cars (from M-15NA) received higher capacity trucks (50 ton) and renumbered 376000-376351.
     M-15PE  42 cars (from M-15NB) received higher capacity trucks (50 ton) and renumbered 377000-377046.

As I used to say when giving presentations on this topic, these cars resembled George Washington's axe.  First the B&O retained the underframe and replaced the carbody, and later they retained the carbody and replaced the underframe.

After the 2nd rebuilding, they superficially resembled the M-63, which were the wagon-top boxcars built new, but those all had Duryea underframes while none of the M-15 classes ever did.

Although we have the very nice ExactRail M-53s, we do not have good plastic models of any of the M-15 classes. 
--
Chris Barkan
Champaign, IL

--
Brian J. Carlson, P.E.
Cheektowaga NY

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