Larry Milberry, Aviation in Canada, McGraw-Hill Ryerson 1979
The North Star was a Canadian development of the Douglas DC-4, using Rolls Royce Merlins instead of the radial engines, which increased the cruising speed about 40%. The prototype first flew in 1946. The aircraft went into service in 1948 with Trans Canada Airlines and provided the platform for the start of their transatlantic service. TCA flew them till the early 1960s and some lasted as freighters till the early seventies. 71 were built.Below, luxury air travel in 1950.