The Vickers Vigilant was a 1920 project to build a British 100-seat flying boat designed by Vickers for transatlantic and Australian flights.
[1] The flying boat was to be a biplane powered by eight Rolls-Royce Condor engines, each pair coupled to drive a shared tractor propeller.
Its structure have been entirely duralumin.
The project was cancelled and the flying boat was not built.
[2] Data from Vickers Aircraft Since 1908[2]General characteristics Performance