Wellington & Manawatu 4-6-0 Locomotives in New_Zealand


Class Details by Steve Llanso of Sweat House Media

Class Ud (Locobase 2708)

Data from [], last accessed 16 December 2009 and and from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 27, p. 17. Works numbers were 24086-24087 in April 1904.

Almost perfect three-foot gauge replica of a standard North American Ten-Wheeler of the period. They were very successful both for the W&M and after the New Zealand Government absorption in 1908, carried on as class Ud (engines 464-465).

464 retired first in July 1929 with 465 following March 1931.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassUd
Locobase ID2708
RailroadWellington & Manawatu
CountryNew Zealand
Whyte4-6-0
Number in Class2
Road Numbers19-20
Gauge3'6"
Number Built2
BuilderBurnham, Williams & Co
Year1904
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)21.17 / 6.45
Ratio of driving wheelbase to overall engine wheelbase 0.52
Overall Wheelbase (engine & tender) (ft / m)44.46 / 13.55
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)65,408 / 29,669
Engine Weight (lbs / kg)88,256 / 40,032
Tender Loaded Weight (lbs / kg)61,376 / 27,840
Total Engine and Tender Weight (lbs / kg)149,632 / 67,872
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)58 / 1473
Boiler Pressure (psi / kPa)185 / 12.80
High Pressure Cylinders (dia x stroke) (in / mm)16.5" x 22" / 419x559
Tractive Effort (lbs / kg)16,239 / 7365.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03
Heating Ability
Tubes (number - dia) (in / mm)170 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.08 / 3.99
Firebox Area (sq ft / m2)92.50 / 8.60
Grate Area (sq ft / m2)16.50 / 1.53
Evaporative Heating Surface (sq ft / m2)1103 / 102.51
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1103 / 102.51
Evaporative Heating Surface/Cylinder Volume202.59
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3053
Same as above plus superheater percentage3053
Same as above but substitute firebox area for grate area17,113
Power L15142
Power MT519.94

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