Ruhrstahl X-4 Air-to-Air missile Luft '46 entry Development began summer 1943. Mass production early 1945. 1,000 to 1,300 airframes completed. BMW rocket motor factory destroyed by bombing which prevented these weapons from entering service. Wire guidance similiar to Hs.293. 5.5 km of guidance wire. 33 sec max duration of powered flight @ 716 mph. 60 kg Weapon weight. 20 kg Warhead weight. I think Germany missed the boat with this weapon. If development had begun same time as Hs.293 it should have been operational during 1943. They should have developed it as an air to ground weapon rather then for shooting down bombers. Fw-189 army liason aircraft could carry one under each wing. He-111 could carry four under each wing. Observer would operate the joystick guidance system. 20kg warhead is big enough to destroy all sorts of battlefield targets such as vehicles, bunkers, light flak emplacements, artillery pieces etc. Just as the Hellfire missile (9kg warhead) does today.