Richmond, Fredericksburg & Potomac 2-6-0 "Mogul" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 11653)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 269. See also RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 10798 in April 1890 and 12331 in October 1891.

This pair repeated the design of Baldwin's Mogul pair shown in Locobase 11570, but adopted much taller drivers. 1 was sold in 1915 to the Georgia & Florida.


Class 11 (Locobase 12346)

Data from RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 2165 in 1891; 2244, 2329 in 1892; 2362, 2369 in 1893; 2497 in 1895.

Adopting taller drivers, more boiler pressure, and greater cylinder volume, these Moguls' lines seem even older than the 1891 date suggests. Their steam domes stood quite tall over the second driving axle.

The RF&P sold 16 to the Washington Southern in 1905 as their 16 and the 14, 12, and 15 to the Georgia & Florida in 1915, which renumbered them 45, 43, 44.


Class 17 (Locobase 16031)

Data from RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. See also "Manufacturing-Supplies", Railway Age, Volume 24 (26 November 1897), p. 968. Works numbers were 2661-2662, 2740-2742 in 1898.

Continuing the 18" x 26" Moguls that Richmond had built for the RF&P from 1891-1895 (Locobae 12346), this later batch replaced the former's radial-stay fireboxes with a square-shouldered Belpaire boiler. This vessel had a few more tubes and was pressed to a higher degree.

21 went to the New York, Auburn & Lansing in February 1909 as their 4.


Class 2 (Locobase 16030)

Data from RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 1836 in 1888, 2070 in 1890, 2498 in 1895.

Their later role as local-traffic engines can obscure the fact that Moguls were first seen as powerful freight locomotives that could take over the drag-freight role from low-drivered 4-4-0s. This Richmond design fits that mold well in turning its small wheels with cylinders of slightly greater cylinder volume than had been installed before.

3 was sold to A&A in 1902, WG McGowan Lumber purchased the 3 in August 1912, and 4 was retired in August 1918.


Class 6 (Locobase 11858)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 13, p. 130. See also RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 8294 in December 1886; 8924 in November 1887; 8931 in December.

This trio of Moguls were typical for the time, but relatively long lived. 6 was sold to Camp Manufacturing in the Dismal Swamp of North Carolina, which sold it in 1923 to the Carolina & Western as its #32.


Class 7 (Locobase 11570)

Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 7. See also RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 9803 and 9807 in February 1889.

Although fitted with a relatively large boiler for 18" x 24" Moguls being produced in this period, these were actually light-footed engines. They had small grates, but deep fireboxes.

Specifications by Steve Llanso of Sweat House Media
Class1111726
Locobase ID11,653 12,346 16,031 16,030 11,858
RailroadRichmond, Fredericksburg & Potomac (RF&P)Richmond, Fredericksburg & Potomac (RF&P)Richmond, Fredericksburg & Potomac (RF&P)Richmond, Fredericksburg & Potomac (RF&P)Richmond, Fredericksburg & Potomac (RF&P)
CountryUSAUSAUSAUSAUSA
Whyte2-6-02-6-02-6-02-6-02-6-0
Number in Class26533
Road Numbers1, 12 / 811-1617-212-46, 5, 9
GaugeStdStdStdStdStd
Number Built26533
BuilderBurnham, Parry, Williams & CoRichmondRichmondRichmondBurnham, Parry, Williams & Co
Year18901891189818881886
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)15.1715.1715.1715.3315.17
Engine Wheelbase (ft)23.1723.1723.1723.1723.17
Ratio of driving wheelbase to overall engine wheebase 0.65 0.65 0.65 0.66 0.65
Overall Wheelbase (engine & tender) (ft)45.4248.8346.6052.4245
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)83,01089,00092,95092,50075,000
Engine Weight (lbs)101,610105,000110,900103,80088,000
Tender Loaded Weight (lbs)70,00072,00053,700
Total Engine and Tender Weight (lbs)175,000182,900157,500
Tender Water Capacity (gals)33003500350035002400
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)4649525142
Geometry Relating to Tractive Effort
Driver Diameter (in)6362625155
Boiler Pressure (psi)150150150130130
High Pressure Cylinders (dia x stroke) (in)18" x 24"18" x 26"18" x 26"19" x 24"18" x 24"
Tractive Effort (lbs)15,73717,32417,32418,77215,623
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.27 5.14 5.37 4.93 4.80
Heating Ability
Firebox Area (sq ft)135123.75141.62133.97121
Grate Area (sq ft)1717.1117.1120.8117
Evaporative Heating Surface (sq ft)15021459148414191340
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)15021459148414191340
Evaporative Heating Surface/Cylinder Volume212.49190.53193.79180.17189.57
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation25502567256727052210
Same as above plus superheater percentage25502567256727052210
Same as above but substitute firebox area for grate area20,25018,56321,24317,41615,730
Power L148514206443729313279
Power MT386.51312.56315.71209.57289.16

Specifications by Steve Llanso of Sweat House Media
Class7
Locobase ID11,570
RailroadRichmond, Fredericksburg & Potomac (RF&P)
CountryUSA
Whyte2-6-0
Number in Class2
Road Numbers7, 10/405-406
GaugeStd
Number Built2
BuilderBurnham, Parry, Williams & Co
Year1889
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)15.17
Engine Wheelbase (ft)23.17
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)75,000
Engine Weight (lbs)
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)2400
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)42
Geometry Relating to Tractive Effort
Driver Diameter (in)55
Boiler Pressure (psi)150
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)18,026
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.16
Heating Ability
Firebox Area (sq ft)135
Grate Area (sq ft)17
Evaporative Heating Surface (sq ft)1502
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1502
Evaporative Heating Surface/Cylinder Volume212.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2550
Same as above plus superheater percentage2550
Same as above but substitute firebox area for grate area20,250
Power L14235
Power MT373.46

Reference


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