Designed around two Rolls-Royce Vulture 24-cylinder X-configuration engines and intended to be catapulted in order to achieve reasonable takeoff runs, the Manchester is best known as the immediate predecessor of the vastly more successful Lancaster. The British and Rolls-Royce resources were inadequate in the perilous early stages of the war to overcome teething problems with the Vulture, so that the Manchester suffered from severe reliability and performance issues. When it was re-engined with 4 Merlins, with the considerable increase in wing area that came along with the two new nacelles, it became the outstanding Lancaster.

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