Santa Fe 2-8-8-2 "Chesapeake" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1700 (Locobase 3559)

Data from Record of Recent Construction #67 (Baldwin Locomotive Works, 1910), p.34-35. See also complete specs at Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 33, pp.190-197. Works numbers were 33868-33869 in October 1909.

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 by Steve Llanso of Sweat House Media
Locobase ID3559
RailroadSanta Fe (ATSF)
Number in Class2
Road Numbers1700-1701
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)16.50 / 5.03
Engine Wheelbase (ft / m)59.83 / 18.24
Ratio of driving wheelbase to overall engine wheebase 0.28
Overall Wheelbase (engine & tender) (ft / m)98.44 / 30
Axle Loading (Maximum Weight per Axle) (lbs / kg)54,900 / 24,902
Weight on Drivers (lbs / kg)412,384 / 187,054
Engine Weight (lbs / kg)462,448 / 209,763
Tender Loaded Weight (lbs / kg)233,520 / 105,923
Total Engine and Tender Weight (lbs / kg)695,968 / 315,686
Tender Water Capacity (gals / ML)12,000 / 45.45
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)4000 / 15.20
Minimum weight of rail (calculated) (lb/yd / kg/m)86 / 43
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)220 / 15.20
High Pressure Cylinders (dia x stroke) (in / mm)26" x 34" / 660x864
Low Pressure Cylinders (dia x stroke) (in / mm)40" x 34" / 1016x864
Tractive Effort (lbs / kg)95,919 / 43508.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30
Heating Ability
Firebox Area (sq ft / m2)236 / 21.93
Grate Area (sq ft / m2)68.50 / 6.37
Evaporative Heating Surface (sq ft / m2)6621 / 615.33
Superheating Surface (sq ft / m2)544 / 50.56
Combined Heating Surface (sq ft / m2)7165 / 665.89
Evaporative Heating Surface/Cylinder Volume316.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15,070
Same as above plus superheater percentage16,276
Same as above but substitute firebox area for grate area56,074
Power L15931
Power MT253.66