Data from ATSF Assorted Steam Locomotive Diagrams supplied in August 1913 by Allen Stanley from his extensive Rail Data Exchange collection. (Thanks to Kevin Bunker for his 20 October 2023 email asking about the AT&SF's 2559.)
Kevin Bunker was puzzled when he couldn't find the 2559 class in Locobase. His hunch that this sextet came to the Santa Fe from the KCM&O. But in its original configuration, the 701s shown here were delivered to the Lake Shore & Michigan Soutbern in 1901; Locobase 15836 shows that class.
When the New York Central rationalized its engine numbers across its system, it added 7000 to all the LS&MS engines. In 1923, the NYC sold this set to the St Louis & Hannibal, whcih passed them on to the KCM&O.
Four years later, the Wichita shops rebuilt the engines, most likely with a new boiler. In addition to reconfiguring the tube bundle, the shops converted the firebox to oil-firing and installed outside constant-lead valve gear actuating piston valves. They did not relocate the inside valve chests, so the Orient's mechanical engineer Orris Bilger modifed the Walschaert gear for inside working.
Once the class came under the AT&SF's umbrella, however, they led short lives before being sent to the ferro-knacker. 2564 fell to the torch first in November 1930, four of the remaining five were disposed of in December 1933 with the 763 finishing off the class in January 1934.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 701/2559 |
| Locobase ID | 16649 |
| Railroad | Kansas City, Mexico & Orient |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 6 |
| Road Numbers | 701-706/2559-2564 |
| Gauge | Std |
| Number Built | |
| Builder | KCM&O |
| Year | 1927 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 17.33 / 5.28 |
| Engine Wheelbase (ft / m) | 25.50 / 7.77 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.68 |
| Overall Wheelbase (engine & tender) (ft / m) | 62.19 / 18.96 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 161,500 / 73,255 |
| Engine Weight (lbs / kg) | 180,500 / 81,874 |
| Tender Loaded Weight (lbs / kg) | 124,500 / 56,472 |
| Total Engine and Tender Weight (lbs / kg) | 305,000 / 138,346 |
| Tender Water Capacity (gals / ML) | 8000 / 30.30 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3657 / 13,842 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 67 / 33.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 63 / 1600 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 30" / 533x762 |
| Tractive Effort (lbs / kg) | 35,700 / 16193.27 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.52 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 334 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 15.42 / 4.70 |
| Firebox Area (sq ft / m2) | 148.40 / 13.79 |
| Grate Area (sq ft / m2) | 43 / 3.99 |
| Evaporative Heating Surface (sq ft / m2) | 2842 / 264.03 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2842 / 264.03 |
| Evaporative Heating Surface/Cylinder Volume | 236.24 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8600 |
| Same as above plus superheater percentage | 8600 |
| Same as above but substitute firebox area for grate area | 29,680 |
| Power L1 | 6256 |
| Power MT | 341.60 |