Iraq State 2-8-2 Locomotives in Iraq
Class Details by Steve Llanso of Sweat House Media
Class Y (Locobase 8583)
Data from [
], a reprint of the Vulcan magazine last accessed 15 July 2007.
Although similar to and inspired by the Indian Railway Standard YD Mikados, this class of 10 (works #6156-6165) were oil-burners and had shorter tubes and flues. They were fitted with the usual Belpaire firebox, a single long dome casing for the sandbox and regulator, and roller bearings on the crosshead. The piston valves measured 8" in diameter.
NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Y |
| Locobase ID | 8583 |
| Railroad | Iraq State |
| Country | Iraq |
| Whyte | 2-8-2 |
| Number in Class | 10 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 10 |
| Builder | Vulcan Foundry |
| Year | 1953 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.42 / 4.09 |
| Engine Wheelbase (ft / m) | 27.75 / 8.46 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 86,968 / 39,448 |
| Engine Weight (lbs / kg) | 126,926 / 57,573 |
| Tender Loaded Weight (lbs / kg) | 90,328 / 40,972 |
| Total Engine and Tender Weight (lbs / kg) | 217,254 / 98,545 |
| Tender Water Capacity (gals / ML) | 3600 / 13.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1980 / 7494 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 22,109 / 10028.49 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.93 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 92 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | 21 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 15.17 / 4.62 |
| Firebox Area (sq ft / m2) | 133 / 12.36 |
| Grate Area (sq ft / m2) | 26 / 2.42 |
| Evaporative Heating Surface (sq ft / m2) | 1381 / 128.35 |
| Superheating Surface (sq ft / m2) | 285 / 26.49 |
| Combined Heating Surface (sq ft / m2) | 1666 / 154.84 |
| Evaporative Heating Surface/Cylinder Volume | 219.03 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4680 |
| Same as above plus superheater percentage | 5476 |
| Same as above but substitute firebox area for grate area | 28,010 |
| Power L1 | 10,531 |
| Power MT | 1067.83 |