The first class of semi-streamlined Jubilee 4-4-4s placed in service by the Canadian Pacific were the five engines of class F2a, delivered in 1936. Their running gear was unusual in at least two respects; the main rod connected to the first set of driving wheels instead of the second (as with the F1 class), and they had 80-inch disc drivers instead of the spoked drivers found on all other CPR steam locomotives, including the Royal Hudsons. The F2s, which weighed 238,000 pounds without tender, had cylinder dimensions of 17¼x28 inches, sustained 300 pounds per square inch of boiler pressure, and developed 26,550 pounds of tractive force. This was less than that of the F1 class, but their 70-square-foot grate area was larger, and their longer boilers provided 124% more heating surface and 122% more superheater surface. These steam-producing features would have given them a higher horsepower at speed. This photo of No. 3002 at Windsor, Ontario, was provided by Tom Rock of T.D.R. Productions. The photographer and date are unknown.