Data from DeGolyer, Volume 20, p. 91. See also "Express Locomotive for the Atlantic City Railroad," Engineering, Volume 64 (16 September 1897) , pp. 351, 357. (Thanks to Chris Hohl for his 25 January 2015 email pointing out the improbability of a tender coal capacity of 76 tons.) Works numbers were 14739-14740 in March 1896 and 15878-15879 in April 1898.
The recently developed Atlantic wheel arrangement permitted larger fireboxes behind the drivers. When the railroad in question was burning anthracite, which needed even bigger grates, the result was the Camelback. Camelbacks separated the engine crew, putting the engineer high on the boiler and over the drivers and the fireman behind the huge Wooten firebox. These ACR engines were Vauclain compounds in which the high and low pressure cylinders shared a common valve gear.
The result was a Flier, posting speeds of 90+ mph and averaging 71 mph between Philadelphia and Atlantic City. On one run in August 1897, 1027 averaged 69.3 mph pulling a train that carried 448 passengers. Both the Atlantic City and parent Philadelphia & Reading ordered more of this design. See Locobase 15924 for the Readings.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 1026 / P1-b |
Locobase ID | 2562 |
Railroad | Philadelphia & Atlantic City (Reading) |
Country | USA |
Whyte | 4-4-2 |
Number in Class | 4 |
Road Numbers | 1026-1029 |
Gauge | Std |
Number Built | 4 |
Builder | Burnham, Williams & Co |
Year | 1896 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 7.25 / 2.21 |
Engine Wheelbase (ft / m) | 26.58 / 8.10 |
Ratio of driving wheelbase to overall engine wheelbase | 0.27 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 40,000 / 18,144 |
Weight on Drivers (lbs / kg) | 79,000 / 35,834 |
Engine Weight (lbs / kg) | 142,900 / 64,818 |
Tender Loaded Weight (lbs / kg) | 84,100 / 38,147 |
Total Engine and Tender Weight (lbs / kg) | 227,000 / 102,965 |
Tender Water Capacity (gals / ML) | 3300 / 12.50 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 66 / 33 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 84.25 / 2140 |
Boiler Pressure (psi / kPa) | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 26" / 330x660 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 22" x 26" / 559x660 |
Tractive Effort (lbs / kg) | 13,143 / 5961.57 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.01 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 278 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 13 / 3.96 |
Firebox Area (sq ft / m2) | 190.20 / 17.67 |
Grate Area (sq ft / m2) | 76 / 7.06 |
Evaporative Heating Surface (sq ft / m2) | 1836 / 170.57 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1836 / 170.57 |
Evaporative Heating Surface/Cylinder Volume | 460.06 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 15,200 |
Same as above plus superheater percentage | 15,200 |
Same as above but substitute firebox area for grate area | 38,040 |
Power L1 | 6842 |
Power MT | 381.87 |