Data from the Queensland Railways Interest Group's website at [], last accessed 21 January 2012.
As noted in Locobase 13761, two of the original five 8D15 Mikado tanks were converted in 1890 to 2-8-0s with tenders. This pair received the same new boiler in 1903 as was installed on the 3 tank engines. The grate was slightly larger, the boiler somewhat smaller, but weight changed little, increasing by only 6 cwt (672 lb). The table in QRIG indicates that the boiler pressure remained set at 130 psi, but Locobase doubts this as he also is skeptical that the tender capacity would have been reduced by 400 Imperial gallons during the upgrade.
Both tender engines were quite satisfactory and remained in service until 1938.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 8D15 tender - reboilered |
Locobase ID | 13763 |
Railroad | Queensland Government Rlys |
Country | Australia |
Whyte | 2-8-0 |
Number in Class | 2 |
Road Numbers | 134, 133 |
Gauge | 3'6" |
Number Built | |
Builder | Ipswich |
Year | 1903 |
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) | 55,776 / 25,300 |
Engine Weight (lbs / kg) | 64,288 / 29,161 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 1680 / 6.36 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 23 / 11.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 36 / 914 |
Boiler Pressure (psi / kPa) | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
Tractive Effort (lbs / kg) | 15,938 / 7229.36 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.50 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 72 / 6.69 |
Grate Area (sq ft / m2) | 14 / 1.30 |
Evaporative Heating Surface (sq ft / m2) | 662 / 61.50 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 662 / 61.50 |
Evaporative Heating Surface/Cylinder Volume | 161.83 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2100 |
Same as above plus superheater percentage | 2100 |
Same as above but substitute firebox area for grate area | 10,800 |
Power L1 | 2249 |
Power MT | 355.58 |