Seaboard Air Line / Georgia Florida & Alabama 2-10-0 "Decapod" Type Locomotives

Class 400 (Locobase 1396)

Data comes from the SAL 1919 Loco Diagrams book supplied in May 2005 by Allen Stanley from his extensive collection. Baldwin produced the 6 GF & As in pairs:

Works number were 57663-57664 (road numbers 400-401) in March 1924, Works 57944-57945 (402-403) in July 1924, works 59264-59265 (404-405) in May 1926.

These are representative of a light decapod developed by Baldwin in the 1920s to put engines with this tractive effort on relatively light rails. See EW King, Jr in Drury (1993), where he describes the design as "free-steaming and fast".

For some reason, the Seaboard did not record the superheater area, so the figure in Locobase is estimated. However, the Seaboard Decapods delivered in 1928-1930 (Locobase 1397) are diagrammed with superheater area and that is the number used in this entry.

22 engines entered service on 6 railroads, most of them not Class I: Alabama, Tennessee & Northern (3), Durham & Southern (3), Georgia, Florida & Alabama as shown above, Great Western (1), and Osage Railroad (1). EW King (in Drury, 1993) notes that the last Durham & Southern was the only locomotive built in the US in 1933, when the Great Depression was hitting hardest. The GF&As later served the Seaboard as 523-528 after that railroad took over the GF&A. (See 1397).

Canadian Locomotive Works supplied 10 very similar engines to the Edmonton, Dunvegan & British Columbia/Northern Alberta Railways.

Class D-3 (Locobase 1397)

Data from 1948 SAL diagram book supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 61229-61236 in March 1930.

After the SAL took over the Georgia, Florida & Alabama's light decapods (see Locobase 1396) , they liked them so much they had Baldwin build eight more.

These were retired in 1952-1953, at which points several of both classes were taken up by Georgia's Gainesville Midland -- aka the Jug Tavern Route -- as their 203-209. The last of these was retired in 1959. The Durham & Southern received the 533.

Some were put on display and data on their works # below comes from the SteamInfo listing (http://www.steamlocomotive.info/ddsearchnew.cfm, last accessed 4 July 2007).

Three were extant in 2007:

GM# Works # Date built

203 60342 January 1928

208 61230 March 1930

209 61233 March 1930

See the long article on restoring the 209 hosted on http://www.rypn.org/rypn_files/articles/Articles/050402gm209/default.htm, last accessed 6 July 2007.

Class D/D-1/D-4/D-5 (Locobase 4402)

857 2-10-0s were built by Baldwin and Alco (Richmond and Schenectady Works) for the Russian Government. When that empire was overthrown, some 200 more of the Russian order was diverted to railroads in the US by the USRA.

Langley and Beckum (in Drury (1993)) comment that the Seaboard liked them for much the same reason as other railroads that used these displaced engines. They were "ideal for logging and phosphate service on light-rail branches in Florida." After the initial 20, 10 more came from the DT&I and 8 others from the GF&A.

In response to a question fielded by the (http://www.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=003EcN, accessed 4 February 2007), Lamar Wadsworth responded on May 30, 2000 that the 2-10-0s proved a good bargain: "the old Decapods (called "Russians") by most men on SAL) were versatile engines well suited to freight service on light rail and undulating terrain-- that's why Gainesville Midland bought a bunch of them secondhand from SAL and got good service out of them .... One very typical assignment for the Russians was in drag freight service pulling trains of iron ore from Cartersville GA to the junction with the SAL main at Rockmart. If you're familiar with the line (now a hiking trail) from Rockmart east, you know that eastbound SAL trains were "down on their knees" from the Rockmart depot up Braswell grade to the "easy spot" just before Divide Tunnel--my father said that a Russian would sometimes shove the rear of a freight on Braswell."

Ilustrations in Linn Wescott (Model Railroader Cyclopedia - Vol 1, 1960) and see Drury (1993), 176. Also see http://www.dnaco.net/~gelwood/other/sal-steambk.html for 1929 locomotive diagrams. These give the higher weights used in the specifications.

Specifications
Class400D-3D/D-1/D-4/D-5
Locobase ID139613974402
RailroadGeorgia Florida & Alabama (SAL)Seaboard Air Line (SAL)Seaboard Air Line (SAL)
Whyte2-10-02-10-02-10-0
Road Numbers400-405 / 523-528529-536500-522, 540-550
GaugeStdStdStd
BuilderBaldwinBaldwinseveral
Year192419301918
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase19.67'19.67'18.33'
Engine Wheelbase28.25'28.25'27.54'
Ratio of driving wheelbase to overall engine wheebase 0.70 0.70 0.67
Overall Wheelbase (engine & tender)59.99'60.87'60.29'
Axle Loading (Maximum Weight per Axle)38000 lbs38000 lbs38000 lbs
Weight on Drivers190000 lbs190000 lbs185000 lbs
Engine Weight212000 lbs212000 lbs207700 lbs
Tender Light Weight141500 lbs137500 lbs134800 lbs
Total Engine and Tender Weight353500 lbs349500 lbs342500 lbs
Tender Water Capacity7000 gals7000 gals7400 gals
Tender Fuel Capacity (oil/coal)12 tons12 tons13 tons
Minimum weight per yard of rail on which locomotive could run63 lb rail63 lb rail62 lb rail
Geometry Relating to Tractive Effort
Driver Diameter56"56"52"
Boiler Pressure190 psi190 psi180 psi
Cylinders (dia x stroke)24" x 28"24" x 28"25" x 28"
Tractive Effort46512 lbs46512 lbs51490 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08 4.08 3.59
Heating Ability
Firebox Area197 sq. ft197 sq. ft227 sq. ft
Grate Area54.30 sq. ft54.30 sq. ft64.70 sq. ft
Evaporative Heating Surface234323432610
Superheating Surface553553579
Combined Heating Surface289628963189
Evaporative Heating Surface/Cylinder Volume159.81159.81164.07
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation103171031711646
Same as above plus superheater percentage122771227713975
Same as above but substitute firebox area for grate area445424454249032
Power L110046100468783
Power MT582.83582.83523.33

Reference

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.