The Bristol Blenheim was a British light bomber aircraft of the Second World War. It was the first twin-engine cantilever metal monoplane to enter the service in the RAF. Its maidden flight was made on June 25, 1936, and it served on March 10, 1937. 4,422 units were manufactured. The wingspan was 17.2 m and its length was 13 m. Its crew was made of 3 men.