Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 54, p. 412. Works number was 42166 in June 1915.
The Wailuku plantation wasn't profligate in its spending on locomotives. It waited eight years after delivery of its second locomotive (Locobase 13157) before it ordered this one. Although about the same size as the Prairie tank, the George H Robertson gave up the front axle and used a boiler with smaller-diameter tubes. Its water and oil-fuel tanks were larger, but it weighed less than the P C Jones. A 1922 photograph shows the cabbage stack with spark arrester.
At the end of that year, the Wailuke Company owned 3,395 acres of cane cultivation, 142 uncultivated acres, and 16,499 acres of forest and pasture land owned in fee.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p 124. Works number was 14812 in April 1896.
A typical radial tank used by several Hawaiian sugar plantations, this Maui-based side tank was one of the smallest. Like those others, however, it faced often challenging operating conditions and suffered. J J Paramalee of the HSC sent a report dated 11 December 1900 (i.e., about four years after it entered service) noting that the 7's springs kept breaking until heavier springs were put in. The planter also had to fit a new Radley & Hunter spark-arresting stack.
Another note indicates that the company paid for Extra Order work to fit the engine's water tank on the boiler (a saddle tank). This may have happened in 1925.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | George H Robertson | Sarah |
Locobase ID | 13158 | 13159 |
Railroad | Wailuku Sugar Company | Wailuku Sugar Company |
Country | USA | Hawaiian Republic |
Whyte | 0-6-2T | 0-6-2T |
Number in Class | 1 | 1 |
Road Numbers | 4 | 2 |
Gauge | 2'6" | 3' |
Number Built | 1 | 1 |
Builder | Baldwin | Burnham, Williams & Co |
Year | 1915 | 1896 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 7.50 / 2.29 | 7 / 2.13 |
Engine Wheelbase (ft / m) | 14.58 / 4.44 | 13.25 / 4.04 |
Ratio of driving wheelbase to overall engine wheelbase | 0.51 | 0.53 |
Overall Wheelbase (engine & tender) (ft / m) | 14.58 / 4.44 | 13.25 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 34,000 / 15,422 | 24,000 / 10,886 |
Engine Weight (lbs / kg) | 39,000 / 17,690 | 31,000 / 13,154 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | ||
Tender Water Capacity (gals / ML) | 1000 / 3.79 | 450 / 3.41 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 300 / 1136 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 19 / 9.50 | 13 / 6.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 33 / 838 | 33 / 838 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 150 / 900 |
High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 | 10" x 16" / 254x406 |
Tractive Effort (lbs / kg) | 7979 / 3619.22 | 6182 / 2804.11 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.26 | 3.88 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 66 - 1.75" / 44 | 59 - 1.75" / 44 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 11 / 3.35 | 9.67 / 2.95 |
Firebox Area (sq ft / m2) | 40 / 3.72 | 31 / 2.88 |
Grate Area (sq ft / m2) | 8.90 / 0.83 | 7.20 / 0.67 |
Evaporative Heating Surface (sq ft / m2) | 370 / 34.39 | 291 / 27.04 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 370 / 34.39 | 291 / 27.04 |
Evaporative Heating Surface/Cylinder Volume | 210.23 | 200.69 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 1424 | 1080 |
Same as above plus superheater percentage | 1424 | 1080 |
Same as above but substitute firebox area for grate area | 6400 | 4650 |
Power L1 | 2850 | 2538 |
Power MT | 554.40 | 699.42 |