According to http://www.udrrhs.org/html/udroster.htm, this Catskill railroad took delivery of these engines in two 6-locomotive batches (builder numbers 39952-39957 and 43061-43066). A builder's photo shows a high-pitched boiler with tapered second course Four were superheated and had their cylinders enlarged to 21 x 26" in 1923-1924.
Except for #31, all were taken into New York Central service when the U&D was absorbed in February 1932. At that point they were renumbered (along with an earlier, lighter class) in the 800 series.
| Specifications | |
|---|---|
| Class | 30 |
| Locobase ID | 4791 |
| Railroad | Ulster & Delaware |
| Whyte | 4-6-0 |
| Road Numbers | 30-41 |
| Gauge | Std |
| Builder | Alco-Schenectady |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14' |
| Engine Wheelbase | 24.75' |
| Ratio of driving wheelbase to overall engine wheebase | 0.57 |
| Overall Wheelbase (engine & tender) | 52.04' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 125000 lbs |
| Engine Weight | 164000 lbs |
| Tender Light Weight | 107600 lbs |
| Total Engine and Tender Weight | 271600 lbs |
| Tender Water Capacity | 5000 gals |
| Tender Fuel Capacity (oil/coal) | 9 tons |
| Minimum weight per yard of rail on which locomotive could run | 69.44 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 200 psi |
| Cylinders (dia x stroke) | 20" x 26" |
| Tractive Effort | 28063 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.45 |
| Heating Ability | |
| Firebox Area | 143.90 sq. ft |
| Grate Area | 43.50 sq. ft |
| Evaporative Heating Surface | 2412 |
| Superheating Surface | |
| Combined Heating Surface | 2412 |
| Evaporative Heating Surface/Cylinder Volume | 255.13 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8700 |
| Same as above plus superheater percentage | 8700 |
| Same as above but substitute firebox area for grate area | 28780 |
| Power L1 | 6956.04 |
| Power MT | 368.05 |
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