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 Middle Run Media | |
|---|---|
| Class | Ud |
| Locobase ID | 2708 |
| Railroad | Wellington & Manawatu |
| Country | New Zealand |
| Whyte | 4-6-0 |
| Number in Class | 2 |
| Road Numbers | 19-20 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1904 |
| Valve Gear | Walschaert |
| 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 / 1280 |
| 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 Volume | 202.59 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3053 |
| Same as above plus superheater percentage | 3053 |
| Same as above but substitute firebox area for grate area | 17,113 |
| Power L1 | 5142 |
| Power MT | 519.94 |