Data from "2-8-2 Oil-Fired Locomotives-Hedjaz Railway", Locomotive Magazine, (November 1952), p 170. Works numbers were 7431-7433 in 1951.
LM described this Mikado trio as "vitrually of the Indian YD type" (Locobase
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 21 |
| Locobase ID | 21241 |
| Railroad | Hejaz |
| Country | Turkey |
| Whyte | 2-8-2 |
| Number in Class | 3 |
| Road Numbers | 21-23 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Stephenson & Hawthorns |
| Year | 1951 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.42 / 4.09 |
| Engine Wheelbase (ft / m) | 32.12 / 9.79 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.42 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.92 / 15.83 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 25,574 / 11,600 |
| Weight on Drivers (lbs / kg) | 83,552 / 37,899 |
| Engine Weight (lbs / kg) | 124,600 / 56,518 |
| Tender Loaded Weight (lbs / kg) | 88,872 / 40,312 |
| Total Engine and Tender Weight (lbs / kg) | 213,472 / 96,830 |
| Tender Water Capacity (gals / ML) | 3590 / 13.60 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7.50 / 28.40 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 |
| 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) | 3.78 |
| 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) | 14.75 / 4.50 |
| Firebox Area (sq ft / m2) | 133 / 12.36 |
| Grate Area (sq ft / m2) | 26 / 2.42 |
| Evaporative Heating Surface (sq ft / m2) | 1381 / 128.30 |
| Superheating Surface (sq ft / m2) | 308 / 28.61 |
| Combined Heating Surface (sq ft / m2) | 1689 / 156.91 |
| 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 | 5522 |
| Same as above but substitute firebox area for grate area | 28,249 |
| Power L1 | 11,004 |
| Power MT | 1161.42 |