Data from DeGolyer, Volume 79, pp. 657+. See also "The First Baldwin Locomotives for Persia", Baldwin Magazine, Volume 10 , No 4 (), p. 49.
Simple little Moguls with few extra appurtenances, although 8" (203 mm) piston valves admitted steam to the cylinders.
Road conditions consisted of 1/2% grades, gentle curves of 9.6 degrees (radii of 180 metres/591 feet), and 70 lb/yard (35 kg/metre) rail. Baldwin Magazine's report emphasized the need for speedy delivery as the customer specified a completion time of ten weeks "and the four locomotives were completed, dismantled and boxed for shipment to Bandar Shahpour well within the time limit."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 300 |
| Locobase ID | 15473 |
| Railroad | Imperial Government of Persia |
| Country | Iran |
| Whyte | 2-6-0 |
| Number in Class | 4 |
| Road Numbers | 300-303 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Baldwin |
| Year | 1931 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 17.33 / 5.28 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 |
| Overall Wheelbase (engine & tender) (ft / m) | 45.27 / 13.80 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 71,000 / 32,205 |
| Engine Weight (lbs / kg) | 87,000 / 39,463 |
| Tender Loaded Weight (lbs / kg) | 86,000 / 39,009 |
| Total Engine and Tender Weight (lbs / kg) | 173,000 / 78,472 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1500 / 5678 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 39 / 19.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 18,212 / 8260.83 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.90 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 186 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.50 / 2.90 |
| Firebox Area (sq ft / m2) | 90 / 8.36 |
| Grate Area (sq ft / m2) | 17.60 / 1.64 |
| Evaporative Heating Surface (sq ft / m2) | 1017 / 94.52 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1017 / 94.52 |
| Evaporative Heating Surface/Cylinder Volume | 198.65 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3080 |
| Same as above plus superheater percentage | 3080 |
| Same as above but substitute firebox area for grate area | 15,750 |
| Power L1 | 3844 |
| Power MT | 358.08 |