The reference for locomotives and railcars


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Richmond & Danville class 820
Southern Railway (USA) class F-1
United States | 1893 | 14 produced
No. 947 in Selma, Alabama
No. 947 in Selma, Alabama

In 1893 and 1894 the Richmond & Danville Railroad received a total of 14 ten-wheelers. Nine of these came from Baldwin and five from Richmond. The locomotives of the two manufacturers hardly differed, a small difference was the grate area of 27.9 and 28.2 square feet respectively.

One of the Baldwin locomotives had a Vauclain compound engine with four cylinders and a slightly higher boiler pressure. It was initially built with 14 and 24 inches diameter cylinders, but was rebuilt directly to 15 and 25 inches diameters.

When the Richmond & Danville was bought up by the Southern Railway in 1894, the locomotives were reclassified to the class F-1. Also in this class were other similar engines built directly for the Southern at about the same time. The scrapping of the 14 locomotives of the former class 820 took place between 1932 and 1939.

ManufacturerBaldwin, RichmondBaldwin
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Fixed wheelbase12 ft
Total wheelbase52 ft 8 in
Service weight135,000 lbs
Adhesive weight107,000 lbs
Total weight221,100 lbs
Axle load35,667 lbs
Fuel capacitycoal
Power sourcesteam
Estimated power700 hp (522 kW)750 hp (559 kW)
Optimal speed21 mph26 mph
Starting effort21,018 lbf18,409 lbf
with start valve22,091 lbf
Power Plant
Driver diameter66 in
Boiler pressure170 psi180 psi
Expansion typesimplecompound
Cylinderstwo, 20 x 24 infour, HP: 15 x 24 in
and LP: 25 x 24 in
Grate area27.9 sq ft28.2 sq ft
Firebox area133 sq ft
Tube heating area1,677 sq ft
Evaporative heating area1,810 sq ft
Total heating area1,810 sq ft
Calculated Values
steam locomotive
Vauclain compound
last changed: 04/2023

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