The only Mogul on the West Point Route was this one, used for freight transfer and switching in the Atlanta area.
This trio of Moguls continued the basic design of the 1900 Baldwins described in Locobase 12214. Boiler capacity increased with the introduction of 12 1/2 tubes. The firebox saw significant revisions that resulted in a longer, wider, and much shallower furnace with a 50% increase in grate area, but less direct heating surface. The long wheelbase of the earlier GRR 2-6-0s continued in this trio.
All three engines served the GRR until their retirements. 424 was scrapped first in 1923, 423 followed in 1929, and 425 completed the withdrawal with its scrapping in 1935.
The 1902 Baldwins shown in Locobase 12603 set the tone for this sextet of Moguls in the length of boiler tubes, approximately equal grate area. But the firebox had more area and the boiler more tubes, and the cylinders more volume. The class ran for decades unchanged - saturated boiler, medium-sized drivers, slide valves with a maximum travel of 5 1/2" (140 mm).
The driving axles were widely spaced with the firebox and the boiler riding above them. The later Georgia Railroad diagram showed an adhesion weight of 123,450 lb (59,996 kg), riding evenly with 41,150 lb (18,665 kg) loading each of the three axles, and the working engine weight reached 140,450 lb (63,707 kg).
Four of the six in the class were scrapped in 1935. 454-455 remained in service through World War II, then were scrapped in 1949.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Railroad||Atlanta & West Point (WPR)||Georgia Railroad (WPR)||Georgia Railroad (WPR)|
|Number in Class||1||3||6|
|Road Numbers||210||38-39, 30 / 424-425, 423||70-75/451-456|
|Builder||Alco-Richmond||Burnham, Williams & Co||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||11.50 / 3.51||15.42 / 4.70||15.42 / 4.70|
|Engine Wheelbase (ft / m)||19.83 / 6.04||23.50 / 7.16||23.58 / 7.19|
|Ratio of driving wheelbase to overall engine wheebase||0.58||0.66||0.65|
|Overall Wheelbase (engine & tender) (ft / m)||55.15 / 16.81||52.58 / 16.03|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)||47,400 / 21,500|
|Weight on Drivers (lbs / kg)||142,000 / 64,410||104,000 / 47,174||116,500 / 52,844|
|Engine Weight (lbs / kg)||162,000 / 73,482||125,000 / 56,699||137,600 / 62,414|
|Tender Loaded Weight (lbs / kg)||131,400 / 59,602||85,000 / 38,555||122,300 / 55,474|
|Total Engine and Tender Weight (lbs / kg)||293,400 / 133,084||210,000 / 95,254||259,900 / 117,888|
|Tender Water Capacity (gals / ML)||5000 / 18.94||4000 / 15.15||6000 / 22.73|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||8 / 7.30||10 / 9.10|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||79 / 39.50||58 / 29||65 / 32.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||56 / 1422||60 / 1524||60 / 1524|
|Boiler Pressure (psi / kPa)||200 / 13.80||180 / 12.40||180 / 12.40|
|High Pressure Cylinders (dia x stroke) (in / mm)||20" x 26" / 508x660||19" x 26" / 483x660||20" x 26" / 508x660|
|Tractive Effort (lbs / kg)||31,571 / 14320.38||23,934 / 10856.29||26,520 / 12029.28|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.50||4.35||4.39|
|Firebox Area (sq ft / m2)||177 / 16.45||137 / 12.73||162.20 / 15.07|
|Grate Area (sq ft / m2)||31.30 / 2.91||28 / 2.60||30.13 / 2.80|
|Evaporative Heating Surface (sq ft / m2)||2042 / 189.78||1783 / 165.71||2253 / 209.31|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||2042 / 189.78||1783 / 165.71||2253 / 209.31|
|Evaporative Heating Surface/Cylinder Volume||216.00||208.98||238.32|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||6260||5040||5423|
|Same as above plus superheater percentage||6260||5040||5423|
|Same as above but substitute firebox area for grate area||35,400||24,660||29,196|