Design and Development
Canadair Aircraft Ltd. took over the Canadian Vickers Ltd. operations on 11 November 1944. Besides the existing Consolidated PBY Canso flying patrol boats in production, a development contract to produce a new variant of the Douglas DC-4 transport, was still in effect. The new Canadair DC-4M powered by Rolls-Royce Merlin engines emerged in 1946 as the "North Star." More than just an engine swap, the North Star had the Douglas DC-6 nose, landing gear and fuselage shortened by 80 in (2 metres), DC-4 empennage, rear fuselage, flaps and wing tips, C-54 middle fuselage sections, wing centre and outer wing panel, cabin pressurisation, a standardized cockpit layout and a different electrical system.
Canadair built 71 examples under the designations: North Star, DC-4M, C-4 and C-5. With the exception of the single C-5 (which had Pratt & Whitney R-2800 engines, as fitted to the Douglas DC-6), these variants were all powered by Rolls-Royce Merlin engines and 51 of the production examples were pressurized.
Read more about this topic: Canadair North Star
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