Santa Fe 2-8-8-2 "Chesapeake" Type Locomotives

Class 1798-1799 (Locobase 3559)

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 arcticulated builders, they avoided the jointed boilers of the later 2-6-6-2s.

In 1924, the engine units were removed and placed under separate boilers, creating two Mikados each.

Specifications
Class1798-1799
Locobase ID3559
RailroadSanta Fe (ATSF)
Whyte2-8-8-2
Road Numbers1798-1799
GaugeStd
BuilderBaldwin
Year1909
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase16.50'
Engine Wheelbase59.83'
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 Drivers412384 lbs
Engine Weight462448 lbs
Tender Light Weight233520 lbs
Total Engine and Tender Weight695968 lbs
Tender Water Capacity12000 gals
Tender Fuel Capacity (oil/coal)4000 gals
Minimum weight per yard of rail on which locomotive could run85.91 lb rail
Geometry Relating to Tractive Effort
Driver Diameter63"
Boiler Pressure220 psi
Cylinders (dia x stroke)26" x 34"
Low Pressure Cylinders (dia x stroke)40" x 34"
Tractive Effort95919 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30
Heating Ability
Firebox Area236 sq. ft
Grate Area68.50 sq. ft
Evaporative Heating Surface6621
Superheating Surface544
Combined Heating Surface7165
Evaporative Heating Surface/Cylinder Volume316.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15070
Same as above plus superheater percentage16214.18
Same as above but substitute firebox area for grate area55862.01
Power L15931.14
Power MT253.66

Reference

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.

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