Oahu Railway & Land Company 4-4-0 "American" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class Leahi (Locobase 11633)
Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 110. Works number was 10131 in July 1889. See the Southern California Scenic Railway Association's account of the life of the OR & L at [
], last accessed 21 August 2010.
This was an unusually small and low-powered Eight-wheeler, even in the narrow-gauge world. The OR & L was built originally to connect Honolulu with 'Aiea 12 mile away. Locobase can't say for sure if the Leahi was present at the railway's opening on 16 November 1889. A full-service common carrier, the OR & L remained resolutely 3-foot gauge during its decades of operation.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Leahi |
| Locobase ID | 11633 |
| Railroad | Oahu Railway & Land Company |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 15 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1889 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.75 / 1.75 |
| Engine Wheelbase (ft / m) | 15 / 4.57 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 14,000 / 6350 |
| Engine Weight (lbs / kg) | 22,000 / 9979 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 750 / 2.84 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 12 / 6 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 12" / 229x305 |
| Tractive Effort (lbs / kg) | 3255 / 1476.44 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.30 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 83 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.17 / 2.19 |
| Firebox Area (sq ft / m2) | 45.65 / 4.24 |
| Grate Area (sq ft / m2) | 5.20 / 0.48 |
| Evaporative Heating Surface (sq ft / m2) | 279 / 25.93 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 279 / 25.93 |
| Evaporative Heating Surface/Cylinder Volume | 317.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 676 |
| Same as above plus superheater percentage | 676 |
| Same as above but substitute firebox area for grate area | 5935 |
| Power L1 | 4121 |
| Power MT | 1297.89 |