This class of compound Consolidations was built for part of the network of lines that radiated eastward from Ottawa in the 1870s and 1880s. The PSC was combined with the Ottawa, Arnprior & Renfrew to become the OA & PS. In 1899, soon after these locomotives were delivered, the Canada Atlantic took over the OA & PS. After several more reorganizations and renamings, the Grand Trunk was formed in 1914. (The GT in turn was taken over by the Canadian National after World War I.)
These 2-8-0s were delivered in two batches (Baldwin spec #4215 and #4457) of 6 -- 690-695/works #15955-15960 -- and 8 -- 696-703/works #16937-40, 54-57. There were few if any differences as delivered. At the time of the first order, performance required hauling 1,500-2,000 short tons of cars up a 1% grade, "Tracks and cars being in good condition". A later account said they could handle 30-35 loaded freight cars.
They were numbered 1362-1275 by the Grand Trunk. When the CN was formed, these became class M-6-a and M-6-b, numbers 1957-1970. By that time some had a simple-expansion arrangement of two 22" x 30" cylinders.
| Specifications | |
|---|---|
| Class | 690 |
| Locobase ID | 5590 |
| Railroad | Ottawa, Arnprior & Parry Sound |
| Whyte | 2-8-0 |
| Road Numbers | 690-695 |
| Gauge | Std |
| Builder | Burnham, Williams & Co |
| Year | 1898 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase | 15.08' |
| Engine Wheelbase | 23.75' |
| Ratio of driving wheelbase to overall engine wheebase | 0.63 |
| Overall Wheelbase (engine & tender) | |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 156000 lbs |
| Engine Weight | 173000 lbs |
| Tender Light Weight | 92000 lbs |
| Total Engine and Tender Weight | 265000 lbs |
| Tender Water Capacity | 3500 gals |
| Tender Fuel Capacity (oil/coal) | 8 tons |
| Minimum weight per yard of rail on which locomotive could run | 65 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 56" |
| Boiler Pressure | 180 psi |
| Cylinders (dia x stroke) | 15.5" x 30" |
| Low Pressure Cylinders (dia x stroke) | 26" x 30" |
| Tractive Effort | 29057 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.37 |
| Heating Ability | |
| Firebox Area | 202 sq. ft |
| Grate Area | 35 sq. ft |
| Evaporative Heating Surface | 2455 |
| Superheating Surface | |
| Combined Heating Surface | 2455 |
| Evaporative Heating Surface/Cylinder Volume | 374.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6300 |
| Same as above plus superheater percentage | 6300 |
| Same as above but substitute firebox area for grate area | 36360 |
| Power L1 | 3157.68 |
| Power MT | 178.50 |
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