Ulster & Delaware 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 30 (Locobase 4791)

Data from Railway and Locomotive Engineering, Volume 20, #1 (July 1907), pp. 310-311.

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 by Steve Llanso of Sweat House Media
Locobase ID4791
RailroadUlster & Delaware
Number in Class12
Road Numbers30-41
Number Built12
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase24.75'
Ratio of driving wheelbase to overall engine wheebase 0.57
Overall Wheelbase (engine & tender)52.04'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers125000 lbs
Engine Weight164000 lbs
Tender Light Weight107600 lbs
Total Engine and Tender Weight271600 lbs
Tender Water Capacity5000 gals
Tender Fuel Capacity (oil/coal)9 tons
Minimum weight of rail (calculated)69 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure200 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort28063 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45
Heating Ability
Firebox Area143.90 sq. ft
Grate Area43.50 sq. ft
Evaporative Heating Surface2412 sq. ft
Superheating Surface
Combined Heating Surface2412 sq. ft
Evaporative Heating Surface/Cylinder Volume255.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8700
Same as above plus superheater percentage8700
Same as above but substitute firebox area for grate area28780
Power L16956
Power MT368.05

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