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.
|Principal Dimensions 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|
|Driver Wheelbase (ft / m)||18.75 / 5.71||19 / 5.79||17.50 / 5.33|
|Engine Wheelbase (ft / m)||41 / 12.50||41.67 / 12.70||39.92 / 12.17|
|Ratio of driving wheelbase to overall engine wheebase||0.46||0.46||0.44|
|Overall Wheelbase (engine & tender) (ft / m)||77.17 / 23.52||77.83 / 23.72||75.79 / 23.10|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||257,500 / 116,800||256,000 / 116,120||276,500 / 125,418|
|Engine Weight (lbs / kg)||376,000 / 170,551||382,000 / 173,272||397,500 / 180,303|
|Tender Loaded Weight (lbs / kg)||217,300 / 98,566||218,600||215,500 / 97,749|
|Total Engine and Tender Weight (lbs / kg)||593,300 / 269,117||600,600||613,000 / 278,052|
|Tender Water Capacity (gals / ML)||12,000 / 45.45||12,000 / 45.45||12,000 / 45.45|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)||14 / 12.70||16 / 12.70||14 / 12.70|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||107 / 53.50||107 / 53.50||115 / 57.50|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||69 / 1753||73 / 1854||63 / 1600|
|Boiler Pressure (psi / kPa)||210 / 14.50||200 / 13.80||200 / 13.80|
|High Pressure Cylinders (dia x stroke) (in / mm)||28" x 30" / 711x762||25" x 28" / 635x711 (3)||25" x 32" / 635x813|
|Low Pressure Cylinders (dia x stroke) (in / mm)||25" x 28" / 635x711 (1)|
|Tractive Effort (lbs / kg)||60,845 / 27598.86||61,130 / 27728.13||77,579 / 35189.28|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.23||4.19||3.56|
|Firebox Area (sq ft / m2)||389 / 36.15||393 / 36.52||420 / 39.03|
|Grate Area (sq ft / m2)||80.40 / 7.47||80 / 7.43||80 / 7.43|
|Evaporative Heating Surface (sq ft / m2)||4978 / 462.64||4982 / 463.01||5010 / 465.61|
|Superheating Surface (sq ft / m2)||1292 / 120.07||1290 / 119.89||1292 / 120.07|
|Combined Heating Surface (sq ft / m2)||6270 / 582.71||6272 / 582.90||6302 / 585.68|
|Evaporative Heating Surface/Cylinder Volume||232.83||208.78||275.57|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||16,884||16,000||16,000|
|Same as above plus superheater percentage||20,430||19,360||19,360|
|Same as above but substitute firebox area for grate area||98,845||95,106||101,640|