Czech State Rwy Articulated Locomotives in Czechoslovakia
Class Details by Steve Llanso of Sweat House Media
Class 623.0 (Locobase 7993)
Data from [
], last accessed 11 October 2013.
After the Czech Republic was founded in 1918, the railway decided to adopt the Hungarian Class VIm Mallet articulated. The design seems to have remained essentially the same, although all of the boiler and firebox dimensions were tweaked.
Some were later superheated; see Locobase 7994.
Class 623.003 - superheated (Locobase 7994)
Data from [], last accessed 11 October 2013.
Although these engines were originally delivered as saturated engines similar to an earlier Hungarian design (Locobase 7993), the CSD soon superheated the batch. Seven--001, 005, 006, 011, 012, 014 and 016--received the Metcalfe exhaust steam injector, which was credited with a savings of 10-12% in fuel consumption.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 623.0 | 623.003 - superheated |
| Locobase ID | 7993 | 7994 |
| Railroad | Czech State Rwy (CSD) | Czech State Rwy (CSD) |
| Country | Czechoslovakia | Czechoslovakia |
| Whyte | 0-6-6-0 | 0-6-6-0 |
| Number in Class | 16 | 16 |
| Road Numbers | 623.001-623.016 | |
| Gauge | Std | Std |
| Number Built | 16 | |
| Builder | ||
| Year | 1922 | 1922 |
| Valve Gear | Heusinger | Heusinger |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | ||
| Engine Wheelbase (ft / m) | ||
| 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) | 171,960 / 78,000 | 171,850 / 77,950 |
| Engine Weight (lbs / kg) | 171,960 / 78,000 | 171,850 / 77,950 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | / 20 | 5280 / 20 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 12 | 13.20 / 12 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 48 / 24 | 48 / 24 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 46.30 / 1175 | 48 / 1220 |
| Boiler Pressure (psi / kPa) | 232.10 / 1600 | 232.10 / 1600 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 24.02" / 400x610 | 15.75" x 24.02" / 400x610 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 23.62" x 24.02" / 600x610 | 23.62" x 24.02" / 600x610 |
| Tractive Effort (lbs / kg) | 35,150 / 15943.79 | 33,905 / 15379.07 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.89 | 5.07 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 261 - 2.047" / 52 | 110 - 2.047" / 52 |
| Flues (number - dia) (in / mm) | / 135 | |
| Flue/Tube length (ft / m) | 16.40 / 5 | 16.40 / 5 |
| Firebox Area (sq ft / m2) | 162.05 / 15.06 | 154.19 / 14.33 |
| Grate Area (sq ft / m2) | 36.80 / 3.42 | 39.17 / 3.64 |
| Evaporative Heating Surface (sq ft / m2) | 2525 / 234.62 | 1845 / 171.46 |
| Superheating Surface (sq ft / m2) | 824 / 76.60 | |
| Combined Heating Surface (sq ft / m2) | 2525 / 234.62 | 2669 / 248.06 |
| Evaporative Heating Surface/Cylinder Volume | 466.18 | 340.63 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 8541 | 9091 |
| Same as above plus superheater percentage | 8541 | 11,910 |
| Same as above but substitute firebox area for grate area | 37,612 | 46,882 |
| Power L1 | 4904 | 15,291 |
| Power MT | 377.23 | 1176.99 |