Richmond, Fredericksburg & Potomac 4-4-0 "American" Locomotives in the USA

Ringaboy: Retro Railware

Modern fabrics meet classic heritage looks. Unique & comfortable retro rail logo shirts & tops for ladies & men. Featuring crew, flowy, hoodies, long sleeve, scoop, slouchy, tank, thermal & V-neck styles. Custom & bulk inquiries welcome.

Class Details by Steve Llanso of Sweat House Media

Class 16 (Locobase 11816)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 11, p. 239. See also RF&P 1908 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 7007-7008 in October 1883.

A pair of relatively small, relatively low-drivered Eight-wheelers gave good service to the RF & P. The 51 (ex-16) remained on the books until 1913, when it was sold to the Detroit, Toledo & Ironton as their #10 and ran another 7 years. The 14 left in 1905 for the Bellefonte Central, another Ohio road, and took number 8. The BC sold it in 1912.


Class 20 (Locobase 11589)

Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 32. Works number was 9871 in March 1889.

This single Eight-wheeler gained some cylinder volume by extending its stroke 2" past the usual for a 17" cylinder. Only a few 4-4-0s would adopt a similar measure, most of the rest increasing the cylinder diameter an inch or more.

Specifications by Steve Llanso of Sweat House Media
Class1620
Locobase ID11,816 11,589
RailroadRichmond, Fredericksburg & Potomac (RF&P)Richmond, Fredericksburg & Potomac (RF&P)
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class21
Road Numbers16, 11 /22, 14 / 5120
GaugeStdStd
Number Built21
BuilderBurnham, Parry, Williams & CoBurnham, Parry, Williams & Co
Year18831889
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.25 / 2.51 8.25 / 2.51
Engine Wheelbase (ft / m)22.17 / 6.7622.17 / 6.76
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,730 / 13,485
Weight on Drivers (lbs / kg)48,000 / 21,77254,870 / 24,889
Engine Weight (lbs / kg)73,000 / 33,11288,750 / 40,256
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2400 / 9.092400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 2046 / 23
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61 / 154966 / 1676
Boiler Pressure (psi / kPa)130 / 9150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x61017" x 26" / 432x660
Tractive Effort (lbs / kg)12,564 / 5698.9414,516 / 6584.35
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.82 3.78
Heating Ability
Firebox Area (sq ft / m2)121 / 11.25121 / 11.25
Grate Area (sq ft / m2)16.50 / 1.5316.50 / 1.53
Evaporative Heating Surface (sq ft / m2)1183 / 109.941183 / 109.94
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1183 / 109.941183 / 109.94
Evaporative Heating Surface/Cylinder Volume187.63173.20
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation21452475
Same as above plus superheater percentage21452475
Same as above but substitute firebox area for grate area15,73018,150
Power L137484319
Power MT344.29347.07

Reference