The Douglas A-26B Invader was developed as a logical succesor of A-20 by Ed Heinemann. He used new powerfull Pratt & Whitney R-2800 engines, wings had laminar profil and the turrets were managed by remote control.
First three prototypes were ordered by the Army Air Corps in May 1941, each with different arnament. The serial aicraft were used by 9th Air Army from November 1944. In Europe dropped the pilots of A-26 over 18 000 tons of bombs. The project was canceled just after the defeat of Japan im September 1945. ...
Nevertheless, after succes during war in Korea, the production started again in 1963 and 6 states had the Invaders 33 years after the first combat flights!
Find more about A-26 Invader on wikipedia
June 2009