Data from [], last accessed 10 May 2008.
Mike Quirk tells us that the Ipswich works had built six boilers for the A10 class, but had 3 left over (4-6). As suburban traffic grew in the Brisbane area, the railway chose to use the three boilers with new running gear and completed these three tanks. But as their tonnage rating came to only 60 tons. After 16-18 years of service, the emergency engines were scrapped in 1900 (74) and November 1902 (72-73).
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 4D10 |
Locobase ID | 9437 |
Railroad | Queensland Government Rlys |
Country | Australia |
Whyte | 2-4-2T |
Number in Class | 3 |
Road Numbers | 72-74 |
Gauge | 3'6" |
Number Built | 3 |
Builder | Ipswich |
Year | 1884 |
Valve Gear | Stephenson |
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) | 25,760 / 11,685 |
Engine Weight (lbs / kg) | 53,984 / 24,487 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | 53,984 / 24,487 |
Tender Water Capacity (gals / ML) | 660 / 2.50 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.70 / 2 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 21 / 10.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 36 / 914 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 18" / 254x457 |
Tractive Effort (lbs / kg) | 5100 / 2313.32 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.05 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 31 / 2.88 |
Grate Area (sq ft / m2) | 7.10 / 0.66 |
Evaporative Heating Surface (sq ft / m2) | 385 / 35.78 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 385 / 35.78 |
Evaporative Heating Surface/Cylinder Volume | 235.29 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 852 |
Same as above plus superheater percentage | 852 |
Same as above but substitute firebox area for grate area | 3720 |
Power L1 | 2376 |
Power MT | 406.69 |