Data from A E Durrant The Steam Locomotives of Eastern Europe (Newton Abbot:David & Charles, 1966), pp 29, 40.
Used the same boiler and cylinders as the 424-class 4-8-0s (Locobase 1577). Three of the four coupled axles used lateral motion devices to conquer the many tight curves. The lead coupled axle used an Adams-Webbs curve adjuster, flanges on the second pair of drivers were pared down by 15 mm (0.6"), and the fourth coupled axle could swing 30 mm (1.2") to each side. The engine's valve motion drove the third axle.
Obviously the 4-8-0 was the preferred arrangement, as over 500 of those were built to two of these. The latter pair's axle loadings proved too heavy for most lines.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 402 |
| Locobase ID | 1573 |
| Railroad | Magyar Allamvasutak (MAV) |
| Country | Hungary |
| Whyte | 2-8-0 |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 2 |
| Builder | MAVAG |
| Year | 1927 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | / 5.40 |
| Engine Wheelbase (ft / m) | / 7.96 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 143,808 / 65,000 |
| Engine Weight (lbs / kg) | 174,496 / 78,900 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 60 / 30 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 53.20 / 1351 |
| Boiler Pressure (psi / kPa) | 185 / 1300 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 23.6" x 26" / 600x660 |
| Tractive Effort (lbs / kg) | 42,803 / 19415.14 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 47.88 / 4.45 |
| Evaporative Heating Surface (sq ft / m2) | 2309 / 214.60 |
| Superheating Surface (sq ft / m2) | 624 / 58 |
| Combined Heating Surface (sq ft / m2) | 2933 / 272.60 |
| Evaporative Heating Surface/Cylinder Volume | 175.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8858 |
| Same as above plus superheater percentage | 10,718 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |