The Henschel Hs 117 Schmetterling (Butterfly) was a radio-guided German surface-to-air missile project developed during World War II.
The operators used a telescopic sight and a joystick to guide the missile by radio control, which was detonated by acoustic and photoelectric proximity fuses, at 10–20 m (33–66 ft).
In May 1944, 59 Hs 117 missiles were tested, some from beneath a Heinkel He 111; over half the trials failed.
Mass production was ordered in December 1944, with deployment to start in March 1945, but on 6 February, the project was cancelled.
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footages from Imperial War Museums
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