According to http://www.trainweb.org/railmaster/nw_rost.html (visited April 2003), this class was later simpled to two 21" x 32" cylinders and given piston valves.
This very large class of Consolidations first entered N & W service when Rogers delivered the first batch in January of 1889. Richmond and Baldwin also supplied Gs over the next few years, the last arriving in 1893.
This small batch of Consolidations was overshadowed by the Gs profiled in Locobase 317. But they represented a definite power upgrade with higher boiler pressure and more boiler heating surface on the same running gear.
Alco's Cooke and Richmond works, Baldwin, and the N&W's own modern facility at Roanoke contributed to this large class of Consolidations. They were quite representative of turn-of -the-century locomotives - saturated boiler, piston valves, long stroke, and a wide firebox.
R & LE reported that "These engines have given excellent service, and are good steamers ...They will pull 1,100 tons up a 61-ft foot grade (1.2%) with moderate curvature."
Most of the class remained essentially unchanged throughout their long careers.
| Specifications | ||||
|---|---|---|---|---|
| Class | B | G | G1 | W2 |
| Locobase ID | 3197 | 3137 | 7821 | 7823 |
| Railroad | Norfolk & Western | Norfolk & Western | Norfolk & Western | Norfolk & Western |
| Whyte | 2-8-0 | 2-8-0 | 2-8-0 | 2-8-0 |
| Road Numbers | 61-70 | 188-314,346-351,558-564 | 200-206, 352-358 | 673-799+ |
| Gauge | Std | Std | Std | Std |
| Builder | Burnham, Williams & Co | several | several | several |
| Year | 1898 | 1889 | 1897 | 1902 |
| Valve Gear | Stephenson | Stephenson | Baker | |
| Locomotive Length and Weight | ||||
| Driver Wheelbase | 15.50' | 14.50' | 14' | 15.50' |
| Engine Wheelbase | 24.50' | 22' | 21.50' | 23.92' |
| Ratio of driving wheelbase to overall engine wheebase | 0.63 | 0.66 | 0.65 | 0.65 |
| Overall Wheelbase (engine & tender) | 55.66' | 56.60' | 48.46' | 55.87' |
| Axle Loading (Maximum Weight per Axle) | 43510 lbs | 32600 lbs | 42790 lbs | |
| Weight on Drivers | 166000 lbs | 106780 lbs | 107000 lbs | 158600 lbs |
| Engine Weight | 186000 lbs | 120565 lbs | 120785 lbs | 175850 lbs |
| Tender Light Weight | 94680 lbs | 62800 lbs | 116630 lbs | 167500 lbs |
| Total Engine and Tender Weight | 280680 lbs | 183365 lbs | 237415 lbs | 343350 lbs |
| Tender Water Capacity | 4000 gals | 4000 gals | 6000 gals | 9000 gals |
| Tender Fuel Capacity (oil/coal) | 8.5 tons | 8.5 tons | 13.8 tons | 14 tons |
| Minimum weight per yard of rail on which locomotive could run | 69.17 lb rail | 44.49 lb rail | 44.58 lb rail | 66.08 lb rail |
| Geometry Relating to Tractive Effort | ||||
| Driver Diameter | 56" | 50" | 50" | 56" |
| Boiler Pressure | 200 psi | 150 psi | 180 psi | 200 psi |
| Cylinders (dia x stroke) | 23" x 32" (1) | 20" x 24" | 20" x 24" | 21" x 30" |
| Tractive Effort | 35890 lbs | 24480 lbs | 29376 lbs | 40163 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.63 | 4.36 | 3.64 | 3.95 |
| Heating Ability | ||||
| Firebox Area | 195 sq. ft | 161 sq. ft | 161 sq. ft | 156 sq. ft |
| Grate Area | 35.08 sq. ft | 31 sq. ft | 31 sq. ft | 50.20 sq. ft |
| Evaporative Heating Surface | 2789 | 1770 | 1812 | 2474 |
| Superheating Surface | ||||
| Combined Heating Surface | 2789 | 1770 | 1812 | 2474 |
| Evaporative Heating Surface/Cylinder Volume | 362.49 | 202.83 | 207.64 | 205.71 |
| Computations Relating to Power Output (More Information) | ||||
| Robert LeMassena's Power Computation | 7016 | 4650 | 5580 | 10040 |
| Same as above plus superheater percentage | 7016 | 4650 | 5580 | 10040 |
| Same as above but substitute firebox area for grate area | 39000 | 24150 | 28980 | 31200 |
| Power L1 | 3943.52 | 3688.42 | 4498.29 | 5050.66 |
| Power MT | 209.49 | 304.61 | 370.73 | 280.83 |
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