Pursuit planes are rolling off assembly lines in such large numbers that army pilots fly them in formation to the air field. Recently the new Airacobra appeared for the first time in formation when three of the deadly sky fighters, designated as P-39 interceptor pursuit planes, made their way from Bell Aircraft Corporation plant in Buffalo, N. Y., to Selfridge Field located at Mt. Clemens, Mich. The Airacobra is a cannon-carrying ship, with its single engine located behind the pilot’s compartment. Many of the airplanes will be delivered to the British Royal Air Force.