The reference for locomotives and railcars
Canadian Pacific class H1 “Royal Hudson”
Canada | 1929 | 65 produced
H1a No. 2804
H1a No. 2804
collection Taylor Rush
H1b No. 2816 in September 2007 in Milwaukee
H1b No. 2816 in September 2007 in Milwaukee
Brian Cazel

The 65 class H1a to H1e locomotives were built for use in front of express and freight trains. Starting with the H1c, they received partial streamlined fairing. After King George VI's train was pulled by an H1d on his visit to Canada in 1939, all streamlined Hudsons were officially allowed to call themselves “Royal Hudson”. The five H1s built in 1940 finally had oil firing. They were replaced by diesel locomotives by 1960 and some continued to run excursion trips for a longer period of time.

VariantH1a, bH1c, dH1e
ManufacturerMontreal Locomotive Works
Axle config4-6-4 (Hudson) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase39 ft 6 in
Fixed wheelbase13 ft 2 in
Total wheelbase80 ft 6 in80 ft 10 1/2 in
Service weight351,200 lbs354,000 lbs366,000 lbs
Adhesive weight183,800 lbs186,800 lbs194,000 lbs
Total weight643,100 lbs649,000 lbs
Water capacity14,400 us gal
Fuel capacity42,000 lbs (coal)5,400 us gal (oil)
Power sourcesteam
Estimated power4,100 hp (3,057 kW)4,200 hp (3,132 kW)
Optimal speed58 mph59 mph
Starting effort45,254 lbf
Power Plant
Driver diameter75 in
Boiler pressure275 psi
Expansion typesimple
Cylinderstwo, 22 x 30 in
Grate area80.8 sq ft
Firebox area352 sq ft326 sq ft
Tube heating area3,482 sq ft3,465 sq ft3,466 sq ft
Evaporative heating area3,834 sq ft3,791 sq ft3,792 sq ft
Superheater area1,640 sq ft1,542 sq ft
Total heating area5,474 sq ft5,431 sq ft5,334 sq ft
Calculated Values
steam locomotive
last changed: 03/2023

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