Vickers Vigilant (1920)

The Vickers Vigilant was a 1920 British project for a 100-seat flying boat intended for transatlantic and Australian flights. It was to be a very large biplane with a wingspan of 220 feet and a gross weight of about 49,800 kg, powered by eight Rolls-Royce Condor engines with each pair coupled to drive a shared tractor propeller, and its structure was to be entirely duralumin. Its design range was 2,000 miles. The project was cancelled and the flying boat was never built, so it is recorded as a design that shows how ambitious early long-range airliner studies were.