The Avro 679 Manchester was a British twin-engine heavy bomber developed during the Second World War by the Avro aircraft company in the United Kingdom. The Manchester was a failure due to its under-developed, under-powered, and unreliable engines, but was the forerunner to the famous Avro Lancaster, one of the most successful bombers of the war.
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http://en.wikipedia.org/wiki/Avro_Manchester
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