Duluth, Missabe & Iron Range 2-10-2 "Santa Fe" Type Locomotives

Class E (Locobase 456)

Firebox fitted with arch tubes.

These DM&IR engines were originally procured by the predecessor DM&N in 1916 as the first Santa Fe types to operate on the road. Retired in 1959-1962

Class E-1 (Locobase 1346)

USRA light Santa Fe. The design was criticized elsewhere because its small drivers frustrated efforts at counterbalancing masses for smooth riding and whose light weight limited adhesion. Drury (1993) observes that the DM&N's 35-mph speed limit kept the counterbalancing problem at bay and that the design was in any case a better one than the earlier E class. Operated until 1959-1963.

See data from DM&IR 6 -1951 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. The diagram shows that all but two of this class (512, 514) eventually had Nicholson thermic syphons.

Specifications
ClassEE-1
Locobase ID4561346
RailroadDuluth, Missabe & Iron Range (DM&IR)Duluth, Missabe & Iron Range (DM&IR)
Whyte2-10-22-10-2
Road Numbers500-505506-515
GaugeStdStd
BuilderSeveralBrooks
Year19161919
Valve GearWalschaertSouthern
Locomotive Length and Weight
Driver Wheelbase20.83'21'
Engine Wheelbase39.83'40.30'
Ratio of driving wheelbase to overall engine wheebase 0.52 0.52
Overall Wheelbase (engine & tender)72.56'75.97'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers276600 lbs274000 lbs
Engine Weight346600 lbs352000 lbs
Tender Light Weight190400 lbs227360 lbs
Total Engine and Tender Weight537000 lbs579360 lbs
Tender Water Capacity9000 gals10000 gals
Tender Fuel Capacity (oil/coal)16 tons16 tons
Minimum weight per yard of rail on which locomotive could run92 lb rail91 lb rail
Geometry Relating to Tractive Effort
Driver Diameter60"57"
Boiler Pressure188.50 psi200 psi
Cylinders (dia x stroke)28" x 32"27" x 32"
Tractive Effort66995 lbs69575 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.13 3.94
Heating Ability
Firebox Area283 sq. ft475 sq. ft
Grate Area80 sq. ft76.30 sq. ft
Evaporative Heating Surface45884642
Superheating Surface11281085
Combined Heating Surface57165727
Evaporative Heating Surface/Cylinder Volume201.18218.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1508015260
Same as above plus superheater percentage1809618312
Same as above but substitute firebox area for grate area64015114000
Power L11335315036
Power MT532.15604.90

Reference

Credits

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

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