Norfolk & Southern 2-6-0 "Mogul" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 12045)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 18, p 63. Works number was 12968 in October 1892

Locobase entries 12045-12046 show two Vauclain compound Moguls that apparently were procured by the N & S to assess two combinations of cylinder volume and driver diamater. The 10 had the greater cylinder volume and taller drivers - its tractive effort calculates a bit higher.

In 1899, the N & S rebuilt the 10 as a 19" x 24" simple-expansion engine. Two years later, the railroad again modified the 10, creating a 4-4-0 with 18" x 24" cylinders and 68" drivers. After serving another 8 years, the 10 retired in 1910.


Class 16 (Locobase 11495)

Data from Baldwin Locomotive Works Specification for Engines, 1903, as digitized by the DeGolyer Library of Southern Methodist University Volume 26, p. 265. Works numbers were 23850, 23923 in March 1904.


Class 9 (Locobase 12046)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 18, p 63. Works number was 12958 in October 1892 and 14742 in March 1896.

Locobase entries 12045-12046 show two Vauclain compound Moguls that apparently were procured by the N & S to assess two combinations of cylinder volume and driver diamater. The 9 had less cylinder volume, but smaller drivers. Surprisingly, perhaps, when the N & S bought a third compound Mogul, they bought a copy of the 9.

Both locomotives were rebuilt as 17" x 24" simple-expansion engines with 62" drivers soon after the turn of the Century. 9 was sold to the John L Roper Lumber Company in 1909. 11 was retired in June 1926.


Class C-1 (Locobase 12475)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 207. Works numbers were 18925 in January 1901 and 20147 in February 1902.

Both were retired in January 1936.


Class C-2 (Locobase 12188)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p. 104. Works number was 14742 in March 1896.

Locobase 12045 describes the earlier two Vauclain compounds that came on the N & S. This later engine was bigger.

As with most North American compounds, this Mogul was later converted to simple expansion using two 17" x 24" cylinders. It was retired in June 1926.

Specifications by Steve Llanso of Sweat House Media
Class10169C-1C-2
Locobase ID12,045 11,495 12,046 12,475 12,188
RailroadNorfolk & Southern (NS)Norfolk & Southern (NS)Norfolk & Southern (NS)Norfolk & Southern (NS)Norfolk & Southern (NS)
CountryUSAUSAUSAUSAUSA
Whyte2-6-02-6-02-6-02-6-02-6-0
Number in Class12221
Road Numbers1016-17 / 110-111 / 106-1079, 1112, 15 / 108-109 / 100-10111/107/103
GaugeStdStdStdStdStd
Number Built12221
BuilderBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & Co
Year18921904189219011896
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.5715 / 4.5715 / 4.5715 / 4.5715 / 4.57
Engine Wheelbase (ft / m)23.75 / 7.2422.67 / 6.9123.08 / 7.0322.67 / 6.9123.08 / 7.03
Ratio of driving wheelbase to overall engine wheebase 0.63 0.66 0.65 0.66 0.65
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)82,000 / 37,19592,000 / 41,73175,000 / 34,01977,000 / 34,92776,000 / 34,473
Engine Weight (lbs / kg)100,000 / 45,359110,000 / 49,89590,000 / 40,82394,000 / 42,63890,000 / 40,823
Tender Loaded Weight (lbs / kg)75,000 / 34,01975,000 / 34,019
Total Engine and Tender Weight (lbs / kg)185,000 / 83,914169,000 / 76,657
Tender Water Capacity (gals / ML)3600 / 13.644000 / 15.153600 / 13.644000 / 15.153000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 2351 / 25.5042 / 2143 / 21.5042 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 157562 / 157556 / 142262 / 142256 / 1422
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40180 / 12.40180 / 12.40180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)13" x 24" / 330x61018" x 24" / 457x61012" x 24" / 305x61017" x 24" / 432x61012" x 24" / 305x610
Low Pressure Cylinders (dia x stroke) (in / mm)22" x 24" / 559x61020" x 24" / 508x61020" x 24" / 508x610
Tractive Effort (lbs / kg)14,837 / 6729.9619,189 / 8703.9913,886 / 6298.5917,116 / 7763.7013,886 / 6298.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.53 4.79 5.40 4.50 5.47
Heating Ability
Firebox Area (sq ft / m2)130 / 12.08113.40 / 10.54123 / 11.4399.10 / 9.21123 / 11.43
Grate Area (sq ft / m2)17.10 / 1.5924.50 / 2.2817.10 / 1.5924.70 / 2.3017 / 1.58
Evaporative Heating Surface (sq ft / m2)1282 / 119.141417 / 131.691275 / 118.491204 / 111.901275 / 118.49
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1282 / 119.141417 / 131.691275 / 118.491204 / 111.901275 / 118.49
Evaporative Heating Surface/Cylinder Volume347.71200.46405.85190.96405.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation30784410307844463060
Same as above plus superheater percentage30784410307844463060
Same as above but substitute firebox area for grate area23,40020,41222,14017,83822,140
Power L134035221363950143639
Power MT274.48375.34320.90430.67316.68

Reference