Atlantic Coast Line 2-10-2 "Santafe" Locomotives of the USA

The Atlantic Coast Line received twenty "Santa Fe" type locomotives from the Baldwin Locomotive Works in 1925. These locomotives were copies of the USRA "Santa Fe-Heavy" and had 63" diameter drivers, 30" x 32" cylinders, a 190 psi boiler pressure, they exerted 73,825 pounds of tractive effort and each weighed 354,000 pounds. They were designated as Class Q-1 and carried road numbers 2000 through 2019.

The firebox on these locom0tives had a combustion chamber, which contributed 120 square feet to overall firebox surface area and 39 square feet of archtubes. There was 6,205 square feet of combined heating surface. Over time the boiler pressure was raised to 200 psi and then raised to 210 psi.

Some of the Class Q-1s were refitted later with a firebox that had 100 sq ft of thermic syphons and 18 sq ft of arch tubes, which contributed to an overall total of 498 sq ft of firebox heating surface. At least two used security circulators in a firebox presenting 477 square feet of direct heating surface. Like most 2-10-2s, these had 14"-diameter piston valves.

In 1946, three more 2-10-2s were added to the ACL roster when the Atlanta, Birmingham & Coast Railroad was merged with ACL. Three AB&C 2-10-2 locomotives (road numbers 401-403) became Class AF-1 and were assigned road numbers 7401-7403.

There are no surviving ACL 2-10-2 "Santa Fe" type locomotives.


Roster by Richard Duley

ClassQty.Road NumbersFrom Other RRYear AcquiredYear BuiltBuilderNotes
Q-1202000-20191925BaldwinNine of the Class Q-1 locomotives sold to the C&IM in 1951 and became C&IM numbers 751-759. All the others scrapped in 1951-1952.
AF-1 37401-7403AB&C19461917BaldwinConveyed from the Atlanta, Birmingham & Coast on 1/1/1946. Ex AB&C numbers 401-403. Numbers 7401-7403 scrapped in 1951-1952.

Class Details by Steve Llanso of Sweat House Media

Class Q-1 (Locobase 72)

Data from 1930 Locomotive Cyclopedia and ACL 3 -1946 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 75, pp 54+. Works numbers were 58647-58650 in September; 58729-58734, 58745-58747, 58768-58769 in October; 58875-58876, 58896-58898 in December

Firebox had combustion chamber, which contributed 120 sq ft (11.15 sq m) to overall firebox surface area and 39 sq ft (3.6 sq m) of archtubes. When delivered, the working boiler pressure was set at 195 psi (13.45 bar), which yielded a calculated 75,771 lb (34,369 kg) of tractive effort. Pressure was raised later to 200, then 210 psi.

Some of the class were refitted later with a firebox that had 100 sq ft (9.3 sq m) of thermic syphons and 18 sq ft (1.65 sq m) of arch tubes, which contributed to an overall total of 498 sq ft (46.25 sq m) of firebox heating surface. At least two used security circulators in a firebox presenting 477 sq ft of direct heating surface. Like most 2-10-2s, these had 14" (356 mm)-diameter piston valves.

After service with the Atlantic Coast Line until 1951-1952, 9 of this class went on to serve with the C&IM as class H-2 until that line dieselized.

Specifications by Steve Llanso of Sweat House Media
ClassQ-1
Locobase ID72
RailroadAtlantic Coast Line (ACL)
CountryUSA
Whyte2-10-2
Number in Class20
Road Numbers2000-2019
GaugeStd
Number Built20
BuilderBaldwin
Year1925
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase22'
Engine Wheelbase42.80'
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender)83.01'
Axle Loading (Maximum Weight per Axle)62780 lbs
Weight on Drivers303060 lbs
Engine Weight391380 lbs
Tender Light Weight221000 lbs
Total Engine and Tender Weight612380 lbs
Tender Water Capacity12000 gals
Tender Fuel Capacity (oil/coal)16 tons
Minimum weight of rail (calculated)101 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure210 psi
Cylinders (dia x stroke)30" x 32"
Tractive Effort81600 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Firebox Area426 sq. ft
Grate Area88.20 sq. ft
Evaporative Heating Surface4975 sq. ft
Superheating Surface1230 sq. ft
Combined Heating Surface6205 sq. ft
Evaporative Heating Surface/Cylinder Volume190.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation18522
Same as above plus superheater percentage22226
Same as above but substitute firebox area for grate area107352
Power L115308
Power MT556.79

Photos

Reference


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