The specs for these passenger Ten-wheelers show that the design used the same boiler and firebox as the V-class 2-8-0s from the year before (Locobase 12418), but the tubes were longer by 8 1/2". The N & W specified that like the Vs, the 9 1/2" piston valves in the A class should be set to provide no lead in full gear. Locobase notes too that they had a relatively long travel of 6 1/2".
The quartet does not ever seem to have been superheated. All were scrapped in September 1928.
These were relatively low-drivered passenger Ten-wheelers on the N&W. The entire class remained intact until 1912 when the 41 was sold in December to the Winston-Salem South Bound, which kept its road number. Almost all of the rest were retired in March 1916 with 40 and 45 surviving until October 1923.
Passenger-service Vauclain compound Ten-wheelers came onto the N & W with this order. they were rebuilt in 1902 with simple-expansion 20" x 24" cylinders.
71 was sold to the Winston Salem Southbound on January 1920; she was joined by 78 in July. The WSSB extended the Roanoke-Winston Salem line south along the Yadkin River. these two Ten-wheeler contributed passenger and mixed-train power until the line was closed to passenger traffic in 1933.
All of the rest of the class were scrapped in 1923 except for 81 in December 1924 and 74-75 in September 1933.
These Consolidations had 9 1/2" piston valves that had no lead in full gear and relatively long strokes of 6 5/16".
Note: At about the same time as these engines were produced, the AERJ printed a brief summary of Frederick Methvan Whyte's proposal for a clearer way to describe steam locomotive wheel arrangements. Its logic spread quickly and within a few years, most English-speaking journals used his system to describe running gear layouts.
Locobase 7822 shows the result of fitting new, taller 62" drivers to the class not long after they arrived.
Among the few Ten-wheeler classes operated by the N & W, this class had 9 1/2"piston valves and a good-sized boiler. Although procured as a fast-freight engines, they spent most of their career in light-passenger and mixed-traffic service. They were joined by the 12 V-class freighters described in Locobase 12418.
The 957 and 959 were the first to go to the scrapyard in August 1929 followed shortly by 955 and 958 in October. Most of the rest were broken up by World War II. Of the few remaining, 954 and 956 lasted the longest before being scrapped in April 1950.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Norfolk & Western (N&W)||Norfolk & Western (N&W)||Norfolk & Western (N&W)||Norfolk & Western (N&W)||Norfolk & Western (N&W)|
|Number in Class||4||13||15||12||17|
|Road Numbers||86-89||38-41, 206-210, 401-404/38-50||71-85||950-961||962-966|
|Builder||Burnham, Williams & Co||shops||Burnham, Williams & Co||Burnham, Williams & Co||Alco-Richmond|
|Locomotive Length and Weight|
|Driver Wheelbase (ft)||13.12||12.50||12.50||12.50|
|Engine Wheelbase (ft)||24.37||23.87||23.75||23.75|
|Ratio of driving wheelbase to overall engine wheebase||0.54||0.52||0.53||0.53|
|Overall Wheelbase (engine & tender) (ft)||49.66||49.67||54.91|
|Axle Loading (Maximum Weight per Axle) (lbs)||44,500|
|Weight on Drivers (lbs)||123,000||97,800||117,000||128,025|
|Engine Weight (lbs)||158,000||123,800||152,000||162,350|
|Tender Loaded Weight (lbs)||167,500|
|Total Engine and Tender Weight (lbs)||329,850|
|Tender Water Capacity (gals)||5000||3600||5000||9000|
|Tender Fuel Capacity (oil/coal) (gals/tons)||14|
|Minimum weight of rail (calculated) (lb/yd)||68||54||65||71|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in)||68||60||68||56||62|
|Boiler Pressure (psi)||200||155||200||200||200|
|High Pressure Cylinders (dia x stroke) (in)||20" x 28"||19" x 24"||14" x 24"||19.5" x 28"||19.5" x 28"|
|Low Pressure Cylinders (dia x stroke) (in)||24" x 24"|
|Tractive Effort (lbs)||28,000||19,025||17,549||32,321||29,193|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.39||5.14||3.62||4.39|
|Firebox Area (sq ft)||180||151||154||180||183|
|Grate Area (sq ft)||32.60||29||23.90||32.40||32.60|
|Evaporative Heating Surface (sq ft)||2559||1928||1977||2459||2403|
|Superheating Surface (sq ft)|
|Combined Heating Surface (sq ft)||2559||1928||1977||2459||2403|
|Evaporative Heating Surface/Cylinder Volume||251.35||244.80||462.34||254.07||248.28|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||6520||4495||4780||6480||6520|
|Same as above plus superheater percentage||6520||4495||4780||6480||6520|
|Same as above but substitute firebox area for grate area||36,000||23,405||30,800||36,000||36,600|