Tails Through Time

Based on the layout and delta configuration of the Avro Vulcan, the Avro Type 722 Atlantic was first proposed in June 1953. The original configuration of the Atlantic had the four engines next to the fuselage as in the Avro Vulcan, but as engineering and design work proceeded, by the time of the Farnborough Air Show in 1953 the engine pairs were moved outward halfway on the wings.

Engines were to have been in the same class as either the Olympus engines used on the Vulcan or the new Rolls-Royce Conway turbofan. The fuselage of the Atlantic was circular in cross-section with a diameter of 12.5 feet which allowed five-abreast seating for up to 120 passengers in rear-facing seats. The cabin was divided in two by a centrally-located galley which could be augmented by a bar/lounge area as well. With a length of 143 feet and a wingspan of approximately 119 feet, the Avro Atlantic would have been able to carry its passengers at a range of nearly 6,000 miles at 40,000+ feet at speeds like that of the Avro Vulcan.

Despite the publicity efforts of Avro, no interest was forthcoming in the Atlantic.
Source: Avro Vulcan: Britain's Famous Delta-Wing V-Bomber by Phil Butler and Tony Buttler. Aerofax/Midland Publishing, 2007, p55.