Five more 4-8-2s (road numbers 1450 through 1454) came from ALCO in 1925. These locomotives had three 25" x 28" cylinders, 73" drivers, a 200 psi boiler pressure and exerted 61,100 lbs of tractive effort. By 1931 DL&W had rebuilt them as two cylinder locomotives.
In 1926 and 1927, the DL&W received thirty more "Mountains" (road numbers 2201 through 2235) from ALCO to be used as pushers and to drag coal trains. These locomotives had three cylinders, two 25 x 32 outside cylinders driving the third drivers and one 25 x 28 inside cylinder driving a crank on the second axle. With 73" drivers and a boiler pressure of 200 psi they exerted 77,600 lbs of tractive effort.
By 1950, all of the DL&W "Mountains" were gone and there are no surviving examples.
|Qty.||Road Numbers||Year Built||Builder||Remarks|
|5||1450-1454||1925||ALCO||3 cylinders rebuilt as 2 cylinders|
Firebox heating surface included 35 sq ft (3.25 sq m) of arch tubes. Each cylinder was fed through relatively small 11" (279 mm) piston valve.
Drury (1993) says these five Mountains (the first on the line) were bought to eliminate double-heading passenger trains on the grades east of Scranton, PA. But they were soon relegated to local service because of their lack of speed.
When the Atlantic Coast Line found itself short of power in World War II, the Lackawanna realized it could spare this class. As the J-1s, these were put in service between Tampa, Fla and Albany, Ga until their retirement in 1951-1952.
Water-tube firebox. Three-cylinder passenger locomotive, two with Baker gear (P-2), three with Walschaert (P-3). Followed two years later by heavier, low-drivered freight version (Locobase 2230) with lots of tractive effort, but much lower adhesive factor.
According to Farrington (Railroading Coast to Coast, 1976), the DL&W's Scranton Shops removed the center cylinder in 1940. Drury, 1993, says this occurred much earlier, in 1930-1931 and the two cylinders were enlarged to 28" x 32" (711 x 813 mm). The locomotive diagrams confirm Drury and show also that, as modified, 1450 and 1452 had 11" (279 mm) piston valves and 1451, 1453-1454 had 14" (356 mm) piston valves. All of the engines used Walschaert gear at that point, but the P-2's (1450-1451) valve travel measured 7 1/2" (191 mm) while the P-3a valves traveled 9" (229 mm).
Firebox heating surface are included 80 sq ft (7.43 sq m) in Superior E-type thermic syphons and 24 sq ft (2.23 sq m) . Low-drivered, three-cylinder locomotive with a low adhesive factor. The two outside cylinders had 32-in strokes and drove the third axle while the inside cylinder had a 28-in stroke powering the second axle. This class followed a high-drivered (73") class in which all three cylinders had the same length stroke. The three cylinders each had a 12" (305 mm) piston valve.
Because these freight locomotives put less demand for maintenance on that hard-to-get-at center cylinder, the Lackawanna left the arrangement intact throughout the class's lifetime. Retirement came in 1946-1950.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Delaware, Lackawanna &Western||Delaware, Lackawanna &Western||Delaware, Lackawanna & Western|
|Number in Class||5||5||35|
|Road Numbers||1401-1405||1450-1454||2201-2225, 2226-2235|
|Valve Gear||Walschaert||Baker or Walschaert||Baker|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.46||0.46||0.44|
|Overall Wheelbase (engine & tender)||77.17'||77.83'||75.79'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||257500 lbs||256000 lbs||276500 lbs|
|Engine Weight||376000 lbs||382000 lbs||397500 lbs|
|Tender Light Weight||217300 lbs||218600 lbs||215500 lbs|
|Total Engine and Tender Weight||593300 lbs||600600 lbs||613000 lbs|
|Tender Water Capacity||12000 gals||12000 gals||12000 gals|
|Tender Fuel Capacity (oil/coal)||14 tons||16 tons||14 tons|
|Minimum weight of rail (calculated)||107 lb/yard||107 lb/yard||115 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||210 psi||200 psi||200 psi|
|High Pressure Cylinders (dia x stroke)||28" x 30"||25" x 28"||25" x 32"|
|Low Pressure Cylinders (dia x stroke)||25" x 28" (1)|
|Tractive Effort||60845 lbs||61130 lbs||77579 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.23||4.19||3.56|
|Firebox Area||389 sq. ft||393 sq. ft||420 sq. ft|
|Grate Area||80.40 sq. ft||80 sq. ft||80 sq. ft|
|Evaporative Heating Surface||4978 sq. ft||4982 sq. ft||5010 sq. ft|
|Superheating Surface||1292 sq. ft||1290 sq. ft||1292 sq. ft|
|Combined Heating Surface||6270 sq. ft||6272 sq. ft||6302 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||232.83||208.78||275.57|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||16884||16000||16000|
|Same as above plus superheater percentage||20430||19360||19360|
|Same as above but substitute firebox area for grate area||98845||95106||101640|