These were, says Drury (1993), the best "(or least unsuccessful)" of the small roster of articulateds on the Santa Fe. Although they had the "preheater" that was in brief vogue among US articulated builders, they avoided the jointed boilers of the later 2-6-6-2s. The pair also deployed the stayless Jacobs-Shupert firebox; see Locobase 463 for a description of this unusual firebox design.
In 1924, the engine units were removed and placed under separate boilers, creating two Mikados each.
| Specifications | |
|---|---|
| Class | 1700 |
| Locobase ID | 3559 |
| Railroad | Santa Fe (ATSF) |
| Whyte | 2-8-8-2 |
| Road Numbers | 1700-1701 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1909 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 16.50' |
| Engine Wheelbase | 59.83' |
| Ratio of driving wheelbase to overall engine wheebase | 0.28 |
| Overall Wheelbase (engine & tender) | 98.44' |
| Axle Loading (Maximum Weight per Axle) | 54900 lbs |
| Weight on Drivers | 412384 lbs |
| Engine Weight | 462448 lbs |
| Tender Light Weight | 233520 lbs |
| Total Engine and Tender Weight | 695968 lbs |
| Tender Water Capacity | 12000 gals |
| Tender Fuel Capacity (oil/coal) | 4000 gals |
| Minimum weight per yard of rail on which locomotive could run | 86 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 220 psi |
| Cylinders (dia x stroke) | 26" x 34" |
| Low Pressure Cylinders (dia x stroke) | 40" x 34" |
| Tractive Effort | 95919 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.30 |
| Heating Ability | |
| Firebox Area | 236 sq. ft |
| Grate Area | 68.50 sq. ft |
| Evaporative Heating Surface | 6621 |
| Superheating Surface | 544 |
| Combined Heating Surface | 7165 |
| Evaporative Heating Surface/Cylinder Volume | 316.90 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 15070 |
| Same as above plus superheater percentage | 16276 |
| Same as above but substitute firebox area for grate area | 56074 |
| Power L1 | 5931 |
| Power MT | 253.66 |
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