Alaska Railroad 2-8-2 "Mikado" Type Locomotives

Class 701 (Locobase 6427)

Data from http://www.alaskarails.org/pix/former-loco/eng-drwgs/701-2-3.html (visited 22 Dec 2004) 703's boiler was pressed to 200 psi and it consequently had a slightly lower tractive effort. These were among the first locomotives to be purchased new by the ARR (Baldwin works #59605-6 in 1926, 60689 in 1928) and they served in steam into the 1950s. In 1954, all three were sold to Spain's FC Langreo..

Specifications
Class701
Locobase ID6427
RailroadAlaska Railroad
Whyte2-8-2
Road Numbers701-703
GaugeStd
BuilderBaldwin
Year1926
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase14.50'
Engine Wheelbase33.17'
Ratio of driving wheelbase to overall engine wheebase 0.44
Overall Wheelbase (engine & tender)68.08'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers175680 lbs
Engine Weight244120 lbs
Tender Light Weight197280 lbs
Total Engine and Tender Weight441400 lbs
Tender Water Capacity10000 gals
Tender Fuel Capacity (oil/coal)10 tons
Minimum weight per yard of rail on which locomotive could run73.20 lb rail
Geometry Relating to Tractive Effort
Driver Diameter54"
Boiler Pressure210 psi
Cylinders (dia x stroke)22" x 28"
Tractive Effort44797 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.92
Heating Ability
Firebox Area
Grate Area57.70 sq. ft
Evaporative Heating Surface2718
Superheating Surface621
Combined Heating Surface3339
Evaporative Heating Surface/Cylinder Volume220.63
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12117
Same as above plus superheater percentage14370.57
Same as above but substitute firebox area for grate area0
Power L10
Power MT0

Credits

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