|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|
|Driver Wheelbase (ft)||12.83||12.83||13.37|
|Engine Wheelbase (ft)||34||34||34.35|
|Ratio of driving wheelbase to overall engine wheebase||0.38||0.38||0.39|
|Overall Wheelbase (engine & tender) (ft)||66.17||66.17||64.65|
|Axle Loading (Maximum Weight per Axle) (lbs)||52,000||53,714||52,900|
|Weight on Drivers (lbs)||150,000||155,140||151,400|
|Engine Weight (lbs)||241,000||248,840||241,000|
|Tender Loaded Weight (lbs)||157,000||157,000||153,000|
|Total Engine and Tender Weight (lbs)||398,000||405,840||394,000|
|Tender Water Capacity (gals)||8000||8000||6000|
|Tender Fuel Capacity (oil/coal) (gals/tons)||13||13||10|
|Minimum weight of rail (calculated) (lb/yd)||83||86||84|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in)||74||74||70|
|Boiler Pressure (psi)||200||200||200|
|High Pressure Cylinders (dia x stroke) (in)||24" x 26"||24" x 26"||22.5" x 28"|
|Tractive Effort (lbs)||34,404||34,404||34,425|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.36||4.51||4.40|
|Firebox Area (sq ft)||206||206||218|
|Grate Area (sq ft)||63||63||54.25|
|Evaporative Heating Surface (sq ft)||4379||3310||3165|
|Superheating Surface (sq ft)||740||740|
|Combined Heating Surface (sq ft)||4379||4050||3905|
|Evaporative Heating Surface/Cylinder Volume||321.66||243.14||245.63|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||12,600||12,600||10,850|
|Same as above plus superheater percentage||12,600||14,868||12,912|
|Same as above but substitute firebox area for grate area||41,200||48,616||51,884|