Fast-growing Trans-Canada Air Lines, the world's eighth largest airline in passenger-miles flown, made its biggest splash last week by announcing that it had ordered 20 Vanguard turboprop airliners from Britain's Vickers-Armstrongs, Ltd. Cost: $67.1 million—the largest single dollar order placed in Britain since war's end.
The Vanguard, which is still only a set of plans on the drawing board plus a wooden mockup, is a big, versatile, medium-range (up to 3,000 miles) airliner that will cruise at 420 m.p.h. Designed with a two-level, "double-bubble" fuselage, the Vanguard will be able to carry two tons of freight and mail on the lower...