|Road Number||Ex Class G-1||Date Rebuilt||Date Scrapped|
These were the last new passenger locomotives bought by the Wabash and were among the last Pacifics to be delivered as saturated-steam engines. Alco-Richmond delivered the first 10 and Baldwin the last 5. Specs for the latter group dictated that the locomotives were to be built "...from American Locomotive Co prints. No changes to be made without approval of the Ry. Co."
See Locobase 6937 for their superheated modifications.
When the Wabash superheated its only store-bought Pacifics (Locobase 6936), it was following an irresistible trend. The result was a relatively light-on-the-drivers 4-6-2 with enough heating surface to be in the middle of the pack and a grate somewhat larger than the average. All in all, a typical Wabash design. And like the other Wabash steam locomotives, run until the end of steam.
Taking a Prairie (Locobase 4202) and stretching it almost 4 feet into a Pacific was not a common way to build a passenger engine, but the Wabash thought it worthwhile enough to do so almost 2 dozen times. In effect, the middle of the boiler remained intact while a couple of feet were added to the wheelbases ahead and behind the driver set. In the process, the 2 1/4" tubes were taken out in favor of more and longer 2" tubes and 30 superheater flues went in the boiler as well.
Like the other Wabash classes, these locomotives had long lives. A curious point about the broken number series: The six 1600 engines ran between Windsor, Ontario and Buffalo, New York; the others operated in the US. All survived past World War II and most saw steam out on the railroad.
|Specifications by Steve Llanso of Sweat House Media|
|Number in Class||16||16||23|
|Road Numbers||660-675||660-675||683-699, 1676-1681|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.38||0.38||0.39|
|Overall Wheelbase (engine & tender)||66.17'||66.17'||64.65'|
|Axle Loading (Maximum Weight per Axle)||52000 lbs||53714 lbs||52900 lbs|
|Weight on Drivers||150000 lbs||155140 lbs||151400 lbs|
|Engine Weight||241000 lbs||248840 lbs||241000 lbs|
|Tender Light Weight||157000 lbs||157000 lbs||153000 lbs|
|Total Engine and Tender Weight||398000 lbs||405840 lbs||394000 lbs|
|Tender Water Capacity||8000 gals||8000 gals||6000 gals|
|Tender Fuel Capacity (oil/coal)||13 tons||13 tons||10 tons|
|Minimum weight of rail (calculated)||83 lb/yard||86 lb/yard||84 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||200 psi||200 psi||200 psi|
|Cylinders (dia x stroke)||24" x 26"||24" x 26"||22.5" x 28"|
|Tractive Effort||34404 lbs||34404 lbs||34425 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.36||4.51||4.40|
|Firebox Area||206 sq. ft||206 sq. ft||218 sq. ft|
|Grate Area||63 sq. ft||63 sq. ft||54.25 sq. ft|
|Evaporative Heating Surface||4379 sq. ft||3310 sq. ft||3165 sq. ft|
|Superheating Surface||740 sq. ft||740 sq. ft|
|Combined Heating Surface||4379 sq. ft||4050 sq. ft||3905 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||321.66||243.14||245.63|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||12600||12600||10850|
|Same as above plus superheater percentage||12600||14868||12912|
|Same as above but substitute firebox area for grate area||41200||48616||51884|