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 Wheelbase (ft)14
Engine Wheelbase (ft)24.75
Ratio of driving wheelbase to overall engine wheebase 0.57
Overall Wheelbase (engine & tender) (ft)52.04
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)125,000
Engine Weight (lbs)164,000
Tender Loaded Weight (lbs)107,600
Total Engine and Tender Weight (lbs)271,600
Tender Water Capacity (gals)5000
Tender Fuel Capacity (oil/coal) (gals/tons)9
Minimum weight of rail (calculated) (lb/yd)69
Geometry Relating to Tractive Effort
Driver Diameter (in)63
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)20" x 26"
Tractive Effort (lbs)28,063
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45
Heating Ability
Firebox Area (sq ft)143.90
Grate Area (sq ft)43.50
Evaporative Heating Surface (sq ft)2412
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2412
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 area28,780
Power L16956
Power MT368.05

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