Canadian Pacific Class G-3a
First in a series of big, powerful Pacifics. Note that in the later G-3d, the boiler pressure climbed while the cylinder diameter shrank. The figure for number of engines in the class covers all versions of the G3.This seems to be one of the locomotives to which James Partington, Estimating Engineer for Alco, compared his company's #50000 in a 5 November 1921 Railway Age article. It's certainly a very close match, although Partington's weights (181,500 lb on the drivers, 299,000 lb total engine weight) are much lower
| Class G-3a Specifications | |
|---|---|
| Wheel Arrangement | 4-6-2 |
| Builder | Angus Works |
| Year Built | 1919 |
| Cylinders | (2) 25" x 30" |
| Boiler Pressure | 200 |
| Driver Diameter | 75 |
| Tractive Effort | 42500 |
| Grate Area | 65 |
| Weight on Drivers | 197120 |
| Locomotive Weight | 322560 |