Camouflage used by 2./JG 1, 1939
The Bf109 underwent numerous improvements throughout its carrier, and mass production of the E variant started late in 1939. Within one year, about 2,000 ?E? aircraft were rolled out. Its excellent performance greatly contributed in the active service of German pilots at the Western Front and during the Battle of Britain. The E-3 version used and improved Daimler-Benz DB601Aa engine capable of 1,100 h.p. output. This engine had provision for mounting a 20mm MG FF cannon on the crankcase and firing through propeller hub. The Messerschmitt Bf109E was one of the best fighters of the early WW2 period, on a par with the British Spitfire.