Data from Railway Age Gazette, Volume 59, No 22 (26 November 1915), p. 1013 and "Interesting Variety of Types of Locomotives for the Greek, Serbian, Belgian and Russian Governments", Railway and Locomotive Engineering, Volume , No 10 (December 1915), p. 406-407 . See also "Mikado Type Locomotives for the Greek Government Rys.", Locomotive Magazine, Volume XXII [22] (15 March 1915), p. 43. Works numbers were 55063-55082 in 1915.
Firebox heating surface area included 16 sq ft (1.49 sq m).n
The RAG's author noted that this design was first tested on a 43-km (27.7-mile) stretch of track that had ruling grades of 2%. Alco's guarantee included an ability to haul 250 metric tons up the 2% grade at 25 km/hr (15 mph) and 60 km/hr (34 mph) on the level and 190 metric tons at 40 km/hr (25 mph) over the 2% grade and 80 km/h (50 mph) on the level.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Ia ( Iota-alpha) |
| Locobase ID | 1517 |
| Railroad | Hellenic State |
| Country | Greece |
| Whyte | 2-8-2 |
| Number in Class | 20 |
| Road Numbers | 401-420/701-720 |
| Gauge | Std |
| Number Built | 20 |
| Builder | Alco-Schenectady |
| Year | 1915 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15.75 / 4.80 |
| Engine Wheelbase (ft / m) | 32.17 / 9.81 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 57.67 / 17.58 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,069 / 15,000 |
| Weight on Drivers (lbs / kg) | 131,800 / 59,784 |
| Engine Weight (lbs / kg) | 187,500 / 85,049 |
| Tender Loaded Weight (lbs / kg) | 105,700 / 47,945 |
| Total Engine and Tender Weight (lbs / kg) | 293,200 / 132,994 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.80 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 55 / 27.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 171.10 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22.99" x 25.98" / 584x660 |
| Tractive Effort (lbs / kg) | 33,284 / 15097.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.96 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 134 - 2.008" / 51 |
| Flues (number - dia) (in / mm) | 21 - 5.394" / 137 |
| Flue/Tube length (ft / m) | 19 / 5.79 |
| Firebox Area (sq ft / m2) | 150 / 13.94 |
| Grate Area (sq ft / m2) | 34.70 / 3.22 |
| Evaporative Heating Surface (sq ft / m2) | 2031 / 188.69 |
| Superheating Surface (sq ft / m2) | 458 / 42.55 |
| Combined Heating Surface (sq ft / m2) | 2489 / 231.24 |
| Evaporative Heating Surface/Cylinder Volume | 162.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5937 |
| Same as above plus superheater percentage | 7006 |
| Same as above but substitute firebox area for grate area | 30,285 |
| Power L1 | 9462 |
| Power MT | 633.08 |