Wabash 4-6-4 "Hudson" Type Locomotives

Class P-1 (Locobase 189)

Five of these locomotives were rebuilt by the Wabash in 1943 from K-5 class 2-8-2 engines originally built by Alco in 1925. Two more followed after World War II, but were derived from earlier K-4s. They lost a cylinder and a driving axle, had larger drivers, and were fitted with roller bearings. The firebox heating surface included 32 sq ft of arch tubes.

The engines were semi-streamlined with long "elephant ears" and given a light blue paint scheme with a broad white stripe along the running boards; the tenders received a similar paint job.

They ran until 1956.

Specifications
ClassP-1
Locobase ID189
RailroadWabash
Whyte4-6-4
Road Numbers700-706
GaugeStd
BuilderWabash
Year1943
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase40.58'
Ratio of driving wheelbase to overall engine wheebase 0.34
Overall Wheelbase (engine & tender)75.46'
Axle Loading (Maximum Weight per Axle)65570 lbs
Weight on Drivers196390 lbs
Engine Weight374680 lbs
Tender Light Weight208000 lbs
Total Engine and Tender Weight582680 lbs
Tender Water Capacity12000 gals
Tender Fuel Capacity (oil/coal)16 tons
Minimum weight per yard of rail on which locomotive could run109.11 lb rail
Geometry Relating to Tractive Effort
Driver Diameter80"
Boiler Pressure220 psi
Cylinders (dia x stroke)26" x 28"
Tractive Effort44244 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.44
Heating Ability
Firebox Area341 sq. ft
Grate Area71 sq. ft
Evaporative Heating Surface4225
Superheating Surface1051
Combined Heating Surface5276
Evaporative Heating Surface/Cylinder Volume245.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation15620
Same as above plus superheater percentage18731.57
Same as above but substitute firebox area for grate area89964.28
Power L126235.60
Power MT883.54

Credits

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