Changes include fix of engine ehxhausts, new paint, pylon, so that you can attach it to a plane. Aerodynamics were also slightly improved. I want to make a He 177, which can use this the way it was actually supposed to be used. But we'll see about that :)

The Hs 293 project was started in 1940, based on the "Gustav Schwartz Propellerwerke" pure glide bomb that was designed in 1939. The Schwartz design did not have a terminal guidance system; instead, it used an autopilot to maintain a straight course. It was intended to be launched from a bomber at sufficient distance to keep the aircraft out of range of anti-aircraft fire. A Henschel team, under Dr. Herbert Wagner, developed it the following year by adding an Walter HWK 109-507 rocket engine underneath, providing 590 kg (1,300 lb) thrust for ten seconds. This allowed the bomb to be used from a lower altitude and at an increased range. Some examples used the BMW 109-511 of 600 kg (1,323 lb) thrust.