Ulster & Delaware 4-6-0 "Ten-Wheeler" Locomotives in 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.

Principal Dimensions by Steve Llanso of Sweat House Media
Class30
Locobase ID4791
RailroadUlster & Delaware
CountryUSA
Whyte4-6-0
Number in Class12
Road Numbers30-41
GaugeStd
Number Built12
BuilderAlco-Schenectady
Year1906
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)24.75 / 7.54
Ratio of driving wheelbase to overall engine wheebase 0.57
Overall Wheelbase (engine & tender) (ft / m)52.04 / 15.86
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)125,000 / 56,699
Engine Weight (lbs / kg)164,000 / 74,389
Tender Loaded Weight (lbs / kg)107,600 / 48,807
Total Engine and Tender Weight (lbs / kg)271,600 / 123,196
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.20
Minimum weight of rail (calculated) (lb/yd / kg/m)69 / 34.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x660
Tractive Effort (lbs / kg)28,063 / 12729.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45
Heating Ability
Firebox Area (sq ft / m2)143.90 / 13.37
Grate Area (sq ft / m2)43.50 / 4.04
Evaporative Heating Surface (sq ft / m2)2412 / 224.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2412 / 224.16
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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