The Canadian National's only essay in Hudsons, these were clearly express machines and ran for years trailing the expresses from Montreal to Toronto. K-5s also pulled the International Limited that ran from Toronto through Windsor and Detroit to Chicago on the Grand Trunk's metals.
But, according to Wes Barris of steamlocomotive.com, the CNR wasn't crazy about the 4-6-4 arrangement and bought only 4-8-4s from that point on. Even so, the last K-5 wasn't retired until 1967.
When the class was headed for the ferroequine knacker's yard, the CN had decided to preserve the class leader. Well, as often happens in such things, someone failed to get the word and 5700 had already been sliced into with the cutting torch when the mistake was discovered. To preserve appearances, 5703, which was still whole, was renumbered 5700 and is now on display at the Elgin County Railway Museum in St Thomas, Ontario.
| Specifications | |
|---|---|
| Class | K-5a |
| Locobase ID | 177 |
| Railroad | Canadian National (CNR) |
| Whyte | 4-6-4 |
| Road Numbers | 5700-5704 |
| Gauge | Std |
| Builder | Montreal LW |
| Year | 1930 |
| Valve Gear | Baker |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14' |
| Engine Wheelbase | 40.17' |
| Ratio of driving wheelbase to overall engine wheebase | 0.35 |
| Overall Wheelbase (engine & tender) | 79.53' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 188600 lbs |
| Engine Weight | 356400 lbs |
| Tender Light Weight | 303500 lbs |
| Total Engine and Tender Weight | 659900 lbs |
| Tender Water Capacity | 16800 gals |
| Tender Fuel Capacity (oil/coal) | 19.8 tons |
| Minimum weight per yard of rail on which locomotive could run | 104.78 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 80" |
| Boiler Pressure | 275 psi |
| Cylinders (dia x stroke) | 23" x 28" |
| Tractive Effort | 43279 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 |
| Heating Ability | |
| Firebox Area | 345 sq. ft |
| Grate Area | 73.60 sq. ft |
| Evaporative Heating Surface | 3377 |
| Superheating Surface | 1465 |
| Combined Heating Surface | 4842 |
| Evaporative Heating Surface/Cylinder Volume | 250.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 20240 |
| Same as above plus superheater percentage | 26363.83 |
| Same as above but substitute firebox area for grate area | 123580.47 |
| Power L1 | 49799.39 |
| Power MT | 1746.37 |
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