Data from DeGolyer, Volume 29, p. 168. (Thanks to Chris Hohl for his October 2020 email supplying the wheelbases and for finding coal capacity in the cab's description.) Works number was 29021 in September 1906.
Saddle-tank switcher for the big Chicago-area power and light company. Baldwin's specs include the rarely seen requirement that no tube could be within 4" (102 mm) of the belly of the boiler. The 1's large grate burned low-grade coal; its drop-grate design featured "long interlocking fingers", probably to ensure every shovelful burned as completely as possible. Believing that the auto coupler would bind on some of the utility's tight curves, CE's shops fastened a 12" (305 mm) bumper block to the back of the engine's back bumper and attached the auto coupler to that.Data from DeGolyer, Volume 35, p. 294. (Thanks to Chris Hohl for his October 2020 email correcting Commonwealth "Electric" to "Edison". and for finding coal capacity in the cab's description.) Works number was 34747 in June 1910.
More powerful and 21 short tons heavier than the #1 of 1906 (Locobase 15040), this saddle-tank was not much longer. The boiler was fatter, but the tubes had the same length as the earlier engine.Data from DeGolyer, Vol 35, p. 294, Vol 73, pp. 27+. Works numbers were 40112 in July 1913, 55626 in September 1922, and 56723 in July 1923.
The next Baldwin to come to ComEd after the saddle tank of 1910 was this much bigger, but not much longer engine. Water storage now demanded a separate tender and the boiler, while quite a bit larger in diameter, still contained short boiler tubes. It was an arrangement that worked, one supposes, because the 5 emerged from the same specifications nine years later followed by the 6 ten months after that.
Principal Dimensions by Steve Llanso of Sweat House Media | |||
---|---|---|---|
Class | 1 | 2 | 4 |
Locobase ID | 15040 | 15041 | 15042 |
Railroad | Commonwealth Electric | Commonwealth Edison | Commonwealth Edison |
Country | USA | USA | USA |
Whyte | 0-6-0ST | 0-6-0ST | 0-6-0 |
Number in Class | 1 | 1 | 3 |
Road Numbers | 1 | 2 | 4-6 |
Gauge | Std | Std | Std |
Number Built | 1 | 1 | 3 |
Builder | Burnham, Williams & Co | Baldwin | Baldwin |
Year | 1906 | 1910 | 1913 |
Valve Gear | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 0.10 / 0.03 | 10.83 / 3.30 | 11.50 / 3.51 |
Engine Wheelbase (ft / m) | 10 / 3.05 | 10.83 / 3.30 | 11.50 / 3.51 |
Ratio of driving wheelbase to overall engine wheelbase | 0.01 | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 10 / 3.05 | 10.83 / 3.30 | 43.44 / 13.24 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||
Weight on Drivers (lbs / kg) | 110,000 / 49,895 | 152,000 / 68,946 | 154,000 / 69,853 |
Engine Weight (lbs / kg) | 110,000 / 49,895 | 152,000 / 68,946 | 154,000 / 69,853 |
Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 | ||
Total Engine and Tender Weight (lbs / kg) | 110,000 | 152,000 | 254,000 / 115,212 |
Tender Water Capacity (gals / ML) | 1500 / 5.68 | 2500 / 9.47 | 5000 / 18.94 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1 / 1 | 1.50 / 1 | 8 / 7 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 61 / 30.50 | 84 / 42 | 86 / 43 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 50 / 1270 | 50 / 1270 | 50 / 1270 |
Boiler Pressure (psi / kPa) | 160 / 11 | 180 / 12.40 | 180 / 12.40 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 | 20" x 26" / 508x660 | 22" x 26" / 559x660 |
Tractive Effort (lbs / kg) | 23,566 / 10689.37 | 31,824 / 14435.14 | 38,507 / 17466.50 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.67 | 4.78 | 4.00 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 160 - 2" / 51 | 198 - 2" / 51 | 374 - 2" / 51 |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | 10.75 / 3.28 | 10.75 / 3.28 | 10.42 / 3.18 |
Firebox Area (sq ft / m2) | 98 / 9.10 | 119 / 11.06 | 192 / 17.84 |
Grate Area (sq ft / m2) | 21.26 / 1.98 | 25.30 / 2.35 | 35.10 / 3.26 |
Evaporative Heating Surface (sq ft / m2) | 992 / 92.16 | 1225 / 113.81 | 2216 / 205.87 |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 992 / 92.16 | 1225 / 113.81 | 2216 / 205.87 |
Evaporative Heating Surface/Cylinder Volume | 125.89 | 129.63 | 193.71 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 3402 | 4554 | 6318 |
Same as above plus superheater percentage | 3402 | 4554 | 6318 |
Same as above but substitute firebox area for grate area | 15,680 | 21,420 | 34,560 |
Power L1 | 2508 | 2889 | 4164 |
Power MT | 150.80 | 125.71 | 178.83 |