Iga 2-6-2 Locomotives in Japan
Class Details by Steve Llanso of Sweat House Media
Class 4 (Locobase 14611)
Data from DeGolyer, Volume 60, pp. 99+. See also "Iga Railway Iga Line" in Wikipedia at [
], last accessed 4 June 2022. Works number was 55033 in September 1921.
This small Prairie tank served the 26 km (16.1 mile) line that ran south from Iga-Ueno on the Kansai line to Nishi-Nabari. It opened on 22 July 1922. Iga is located in Mie Prefecture on the southeastern coast of Honshu about 95 km southwest of Nagoya and northwest of Osaka Bay.
The Iga line's electrification in 1926 probably rendered the 4 surplus to requirements, but Locobase has no information on its later career.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 4 |
| Locobase ID | 14611 |
| Railroad | Iga |
| Country | Japan |
| Whyte | 2-6-2T |
| Number in Class | 1 |
| Road Numbers | 4 |
| Gauge | 3'6" |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 19.75 / 6.02 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | 19.75 / 6.02 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 44,500 / 20,185 |
| Engine Weight (lbs / kg) | 63,200 / 28,667 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 9277 / 4207.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.80 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 80 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 41 / 3.81 |
| Grate Area (sq ft / m2) | 9.27 / 0.86 |
| Evaporative Heating Surface (sq ft / m2) | 368 / 34.19 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 368 / 34.19 |
| Evaporative Heating Surface/Cylinder Volume | 156.18 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1483 |
| Same as above plus superheater percentage | 1483 |
| Same as above but substitute firebox area for grate area | 6560 |
| Power L1 | 2464 |
| Power MT | 366.21 |