The reference for locomotives and railcars
Chicago, Rock Island & Pacific (Rock Island) classes R-65 and R-67
United States | 1929 | 85 produced
R-67b No. 5043 in October 1940 at Kansas City
R-67b No. 5043 in October 1940 at Kansas City
collection Taylor Rush

The first 65 Northerns of the Rock Island were delivered by ALCO in Schenectady in 1929 and 1930. They had a driver diameter of 69 inches and were primarily intended for service with freight trains. Some later received 74 inch wheels to be more suitable for passenger trains and were renamed the R-67 class as a result. In the years 1944 and 1946 further R-67bs were built, which had larger wheels from the start. Although they had a higher boiler pressure and a larger firebox, they had a smaller tube heating area and a significantly smaller superheater. The 1944 batch were oil fired while the rest were coal fired.

Built1929-19301944, 1946
Axle config4-8-4 (Northern) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase45 ft 7 in47 ft 1 in
Fixed wheelbase19 ft 3 in19 ft 9 in
Total wheelbase88 ft95 ft 11 in
Service weight434,000 lbs467,000 lbs
Adhesive weight265,500 lbs280,000 lbs
Total weight738,300 lbs837,500 lbs
Axle load66,375 lbs70,000 lbs
Water capacity15,000 us gal21,500 us gal
Fuel capacity40,000 lbs (coal)5,500 us gal (oil)
Power sourcesteam
Estimated power4,400 hp (3,281 kW)4,800 hp (3,579 kW)
Optimal speed42 mph46 mph
Starting effort66,620 lbf67,088 lbf
Power Plant
Driver diameter69 in74 in
Boiler pressure250 psi270 psi
Expansion typesimple
Cylinderstwo, 26 x 32 in
Grate area88.3 sq ft96.3 sq ft
Firebox area505 sq ft578 sq ft
Tube heating area4,938 sq ft3,995 sq ft
Evaporative heating area5,443 sq ft4,573 sq ft
Superheater area2,243 sq ft1,438 sq ft
Total heating area7,686 sq ft6,011 sq ft
Calculated Values
steam locomotive
last changed: 07/2023

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