Identical design to the Boston & Maine's R-1d, but built 9 years later to handle high freight traffic demands on the Lehigh & Hudson River from Allentown to Maybrook, NY.
Marty Feldner, writing in his L & HR website (http://lhr.railfan.net/10steam.htm, visited 18 May 2005), says that these Mountains made a big impression when they went into service. Their boilers didn't handle the local water very well, however, foaming badly and suffering from scaling to a degree that other classes didn't seem to reach. They certainly were powerful and fast, sometimes hitting 70 mph as they gathered momentum for the long eastbound climb from McAfee to Sugar Loaf.
When the L & HR put 13 Alco diesels in service, the 10s were redundant. Attempts to sell them to other railroads fell through and they were scrapped.
| Specifications | |
|---|---|
| Class | R-1d |
| Locobase ID | 207 |
| Railroad | Lehigh & Hudson River |
| Whyte | 4-8-2 |
| Road Numbers | 10-12 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1944 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 19.25' |
| Engine Wheelbase | 44.17' |
| Ratio of driving wheelbase to overall engine wheebase | 0.44 |
| Overall Wheelbase (engine & tender) | |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 269116 lbs |
| Engine Weight | 415200 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 0 |
| Tender Water Capacity | |
| Tender Fuel Capacity (oil/coal) | |
| Minimum weight per yard of rail on which locomotive could run | 112 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 73" |
| Boiler Pressure | 240 psi |
| Cylinders (dia x stroke) | 28" x 31" |
| Tractive Effort | 67918 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.96 |
| Heating Ability | |
| Firebox Area | |
| Grate Area | 79 sq. ft |
| Evaporative Heating Surface | 4511 |
| Superheating Surface | 1887 |
| Combined Heating Surface | 6398 |
| Evaporative Heating Surface/Cylinder Volume | 204.18 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 18960 |
| Same as above plus superheater percentage | 24458 |
| Same as above but substitute firebox area for grate area | 0 |
| Power L1 | 0 |
| Power MT | 0 |
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