John,

The basis for the 2900 class was the 3776 class a "lightweight" duplicate of the
3765 class but due to the war restriction the lightweight of the 3776 was gone
for sure in the 2900's. The closest 2-10-4 regarding the boiler, cab, and tender
to the AM die cast 2900 is the 5011 class, the one leased to the PRR in 1956,
and built during the war. The other classes of 2-10-4 are the following : 5000
Class,1 engine nicknamed  "Madame Queen" on display in Amarillo (This one is the
oldest of the family and have smaller wheels diameter than the 5001 and 5011
class); 5001 class. The latter is fairly close to the 5011 class.
The ATSF does not have some K4's but owned three L1's in the 882 Class from july
1945 to july 1947 when the trio was scrapped. The PRR # were 4031-4185-8191
(originally 7342). They ran on the eastern end of the network probably around
Shopton IA for a very short time, being stored early. The ATSF owned two other
foreign road classes of locos with the 2-8-8-2 1790 class from the N&W bought in
1945 and sold in 1948 to the Virginian, and the former Boston and Maine 2-8-4 of
the 4193 Class. All were scrap in 1949 except one rebuilt in 1947 and scrapped
in 54.

Keep rockin'

Philippe Cousyn
Freezin' France



Selon John Picur <[email protected]>:

> ... suffered from WPB restrictions on strategic metals.  Couldn't employ
> lightweight alloys that kept the weight down on their predecessors.  So the
> 2900s ended up as the heaviest of all 4-8-4s even though, as you say, they
> were essentially the same design as the 3765s.
>
>
>   ----- Original Message -----
>   From: Scale S Only
>   To: [email protected]
>   Sent: Sunday, December 14, 2008 5:24 PM
>   Subject: Re: {S-Scale List} Re: The Mighty________ (You fill in the blank)
>
>
>   Hi all --
>
>   OK, I was forced to get out my ATSF loco book by Ellington which has all
> the
>   info anyone could ever want. First, the 2-10-4 that uses essentially the
>   same superstructure is the 5011 class, not the 5000 class as I thought
>   earlier. (NOT being a major ATSF fan, these subtleties escaped me.)
>   These were huge engines with 74" drivers and 42" lead truck wheels. The
>   AM model can represent either the 3765 class or the 2900 class 4-8-4, as
>   they are essentially the same except for very minor details and build
> dates.
>
>   Interesting what these discussions force one to learn!
>
>   Have fun!
>   Bill Winans
>   Prescott Valley, AZ
>
>   --- In [email protected], "Robert Nicholson" <user141...@...>
>   wrote:
>   >
>   > If I remember correct, the 5000-Class 2-10-4's and the 2900-Class
>   > 4-8-4's used the same boiler.
>
>   A quick check of drawings in the MR Steam Locomotive Cyc shows the
>   5000 class 2-10-4 locomotive alone, pilot tip to end of frame, to be
>   slightly over two feet longer than the 2900 class 4-8-4. I'm
>   guessing the boiler would be likewise longer. That 3/8" would be
>   close enough for some, far enough for others to get their shorts up
>   all in a knot.
>
>   Still, a 2-10-4 chassis under the AM boiler would be an economical
>   way of getting a 5000 class in S. Years ago Bachmann did it in HO
>   and it didn't look too bad. Too bad they put that horrible NYC PT
>   tender behind it.
>
>   Rich G.
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>



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