Data from Catalogue 10036--Locomotives for Export (New York City, April 1910), pp. 47-48. Works numbers were 44682-44699 in March 1908.
This class of Ten-wheelers immediately preceded the seven Pacifics on Richmond's production line (Locobase 20190). Locobase notes in both entries that their common destination, identical boiler pressure and passenger-scaled driver diameter allow a direct comparison between a 4-6-0 and a 4-6-2 by the same builder in the same period of design transtion.
Here are some numbers: the Pacific weighed 19 tons more than the 4-6-0 but put a little less weight on the drivers; driving wheelbase was actually shorter, but the extra axle contributed to the 8 foot (2.44 m) longer engine wheelbase .Cylinder volume in the 4-6-2 increased by 20%, which was matched by the 25% increase in evaporative heating surface area and grate area by 56%, but the latter lay at the bottom of a wider firebox that was shorter and much shallower. As a result, the Pacific had slightly less total direct heating surface area.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 602 |
Locobase ID | 20193 |
Railroad | South Manchurian |
Country | Japan |
Whyte | 4-6-0 |
Number in Class | 18 |
Road Numbers | 602-619 |
Gauge | Std |
Number Built | 18 |
Builder | Alco-Richmond |
Year | 1908 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 14.50 / 4.42 |
Engine Wheelbase (ft / m) | 24.67 / 7.52 |
Ratio of driving wheelbase to overall engine wheelbase | 0.59 |
Overall Wheelbase (engine & tender) (ft / m) | 52.75 / 16.08 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 121,500 / 55,112 |
Engine Weight (lbs / kg) | 158,500 / 71,894 |
Tender Loaded Weight (lbs / kg) | 107,100 / 48,580 |
Total Engine and Tender Weight (lbs / kg) | 265,600 / 120,474 |
Tender Water Capacity (gals / ML) | 5000 / 18.94 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 68 / 34 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 69 / 1753 |
Boiler Pressure (psi / kPa) | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 |
Tractive Effort (lbs / kg) | 21,346 / 9682.39 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.69 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 268 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 14.25 / 4.34 |
Firebox Area (sq ft / m2) | 162 / 15.05 |
Grate Area (sq ft / m2) | 32.40 / 3.01 |
Evaporative Heating Surface (sq ft / m2) | 2150 / 199.74 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 2150 / 199.74 |
Evaporative Heating Surface/Cylinder Volume | 272.99 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 6480 |
Same as above plus superheater percentage | 6480 |
Same as above but substitute firebox area for grate area | 32,400 |
Power L1 | 8644 |
Power MT | 470.54 |