Data from Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 18, p.150,. Works number was 13186 in January 1893.
This tank had the dimensions of a typical light 4-4-0 of the time, but with the auxiliary trucks distributed to allow easier bi-directional running. When the B&M took over the C&M in 1895, it assigned new road numbers and at some later date, removed both auxiliary trucks. 57 was sold in March 1912 to Grovet Paper Company.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p. 206,. See also the Steamtown National Historical Site's Special History Study on the Berlin Mills Railway 2-4-2T Locomotive No. 7, as archived at [], last accessed 18 October 2013. (Thanks to Chris Hohl for his 27 July 2021 email supplying the coal capacity and correcting the tube length.) Works number was 27370 in February 1906.
Data from [], last accessed 21 July 2011. Vulcan works number for the 7 was 1679 in January 1911.
Principal Dimensions by Steve Llanso of Sweat House Media | |||
---|---|---|---|
Class | 25 | 6 | 7 |
Locobase ID | 12065 | 12909 | 5307 |
Railroad | Concord & Montreal (B&M) | Berlin Mills | Berlin Mills |
Country | USA | USA | USA |
Whyte | 2-4-2T | 2-4-2ST | 2-4-2ST |
Number in Class | 1 | 1 | 3 |
Road Numbers | 25/ 725/57 | 6 | 7, 3, 8 |
Gauge | Std | Std | Std |
Number Built | 1 | 1 | 3 |
Builder | Burnham, Williams & Co | Burnham, Williams & Co | Vulcan Foundry |
Year | 1893 | 1906 | 1911 |
Valve Gear | Stephenson | Stephenson | Walschaert |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 7 / 2.13 | 7 / 2.13 | 7 / 2.13 |
Engine Wheelbase (ft / m) | 22.67 / 6.91 | 22.42 / 6.83 | 22.58 / 6.88 |
Ratio of driving wheelbase to overall engine wheelbase | 0.31 | 0.31 | 0.31 |
Overall Wheelbase (engine & tender) (ft / m) | 22.67 / 6.91 | 22.42 / 6.83 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||
Weight on Drivers (lbs / kg) | 65,000 / 29,484 | 80,000 / 36,287 | 85,000 / 38,555 |
Engine Weight (lbs / kg) | 95,000 / 43,091 | 113,000 / 51,256 | 115,000 / 52,163 |
Tender Loaded Weight (lbs / kg) | |||
Total Engine and Tender Weight (lbs / kg) | 95,000 | 113,000 | 115,000 |
Tender Water Capacity (gals / ML) | 1500 / 5.68 | 1800 / 6.82 | 1500 / 5.68 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.75 / 2 | 2 / 2 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 | 67 / 33.50 | 71 / 35.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 44 / 1118 | 44 / 1118 | 44 / 1118 |
Boiler Pressure (psi / kPa) | 170 / 11.70 | 175 / 12.10 | 140 / 13.10 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 | 16" x 22" / 406x559 | 17" x 24" / 432x610 |
Tractive Effort (lbs / kg) | 20,177 / 9152.14 | 19,040 / 8636.41 | 18,759 / 8508.95 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.22 | 4.20 | 4.53 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 175 - 2" / 51 | 180 - 2" / 51 | 186 - 2" / 51 |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | 10.83 / 3.30 | 10.58 / 3.30 | 12.33 / 3.76 |
Firebox Area (sq ft / m2) | 77.70 / 7.22 | 112 / 10.41 | |
Grate Area (sq ft / m2) | 14.40 / 1.34 | 14.30 / 1.33 | 22.50 / 2.09 |
Evaporative Heating Surface (sq ft / m2) | 1062 / 98.70 | 1102 / 102.38 | |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 1062 / 98.70 | 1102 / 102.38 | |
Evaporative Heating Surface/Cylinder Volume | 189.98 | 215.23 | |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 2448 | 2503 | 3150 |
Same as above plus superheater percentage | 2448 | 2503 | 3150 |
Same as above but substitute firebox area for grate area | 13,209 | 19,600 | |
Power L1 | 3235 | 4166 | |
Power MT | 219.44 | 229.61 |