Henschel Hs 117
The Henschel Hs 117 Schmetterling (German for Butterfly) was a radio-guided German surface-to-air missile project developed during World War II. There was also an air-to-air version, the Hs 117H. 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). == Development == In 1941, Professor Herbert A. Wagner (who was previously responsible for the Henschel Hs 293 anti-ship missile) invented the Schmetterling missile and submitted it to the Reich Air Ministry (RLM), who rejected the design because there was no need for more anti-aircraft weaponry.