AVRO Type 683 Lancaster

The Avro Type 683 Lancaster actually started life in 1937, as a two-engined design - the ill-fated Manchester. Although the Manchester was an advanced aeroplane for the time, early problems with stability saw the addition of a third fin on the rear fuselage. First flown on July 25, 1939, 200 Manchester Mk.1s were built and delivered to the RAF.