Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p. 157. Works number was 15810 in March 1898.
Locobase wonders if the specified operating boiler pressure remained in effect for long. Limitations on axle loading led to a calculated F/A of 3.26, which would render this small Eight-wheeler highly prone to slipping. Reducing the MEP to 150 psi would have made the 3 much more sure-footed.
This Arizona road ran the 3 for about 10 years before it was taken over by the Maricopa & Phoenix in April 1906 and renumbered 6. The M & P renumbered it 75 in 1907, then was taken over by the Arizona Eastern in December 1910. 75 bore the AE herald for less than 5 years before heading to the ferro-knacker in April 1915.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3 |
| Locobase ID | 12264 |
| Railroad | Gila Valley, Globe & Northern |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 3 / 6 / 75 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1898 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 21.75 / 6.63 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 51,000 / 23,133 |
| Engine Weight (lbs / kg) | 75,000 / 34,019 |
| Tender Loaded Weight (lbs / kg) | 65,000 / 29,484 |
| Total Engine and Tender Weight (lbs / kg) | 140,000 / 63,503 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3200 / 12,112 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 15,667 / 7106.44 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.26 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 169 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.81 / 3.29 |
| Firebox Area (sq ft / m2) | 108 / 10.03 |
| Grate Area (sq ft / m2) | 15.43 / 1.43 |
| Evaporative Heating Surface (sq ft / m2) | 1057 / 98.23 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1057 / 98.23 |
| Evaporative Heating Surface/Cylinder Volume | 189.09 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2777 |
| Same as above plus superheater percentage | 2777 |
| Same as above but substitute firebox area for grate area | 19,440 |
| Power L1 | 5142 |
| Power MT | 444.56 |