Henschel Hs 117

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Hs 117 Schmetterling
Hs 117 UdvarHazy.jpg
A Schmetterling missile on display at the National Air and Space Museum (NASM), Steven F. Udvar-Hazy Center.
TypeSurface-to-air (SAM) / Air-to-air (AAM) missile
Place of originGermany
Production history
DesignerProfessor Herbert A. Wagner
Designed1942-1943
Manufacturer Henschel Flugzeugwerke
VariantsHs 117M (air-to-air missile variant)
Specifications (Hs 117)
Mass450 kg (990 lb), [1] 620 kg (1,370 lb) with launch boosters[ citation needed ]
Length4,200 mm (170 in)
Diameter350 mm (14 in)
Wingspan2,000 mm (79 in)

Warhead High explosive

Engine1x BMW 109-558 liquid-fuelled rocket engine
3.7 kN (830 lbf) for 33 sec, followed by 0.588 kN (132 lbf) for 24 sec [1]
Propellant Tonka-250 (50% triethylamine and 50% xylidine) fuel, with SV-Stoff (nitric acid) oxidiser [1]
Operational
range
32 km (20 mi; 17 nmi)
Flight altitude6,000–9,000 m (20,000–30,000 ft) [1]
Boost time2x Schmidding 109-553 Ethylene glycol solid fuel boosters, giving total 17.1 kN (3,800 lbf) thrust for 4 sec.
Maximum speed 900–1,000 km/h (560–620 mph; 490–540 kn) [1]
Guidance
system
MCLOS; visual guidance by telescope, radio controls; two-man crew [1]

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. [2]

Contents

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). [3]

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.

However, by 1943 the large-scale bombing of Germany caused the RLM to change its mind, and Henschel was given a contract to develop and manufacture it. The team was led by Professor Wagner, and it produced a weapon somewhat resembling a bottlenose dolphin with swept wings and cruciform tail. [1]

In May 1944, 59 Hs 117 missiles were tested, some from beneath a Heinkel He 111; over half the trials failed. [2] Mass production was ordered in December 1944, with deployment to start in March 1945. Operational missiles were to be launched from a 37mm gun carriage. [1]

In January 1945, a prototype for mass production was completed, and production of 3,000 missiles a month was anticipated, [1] but on 6 February, SS-Obergruppenführer Hans Kammler cancelled the project.

Variants

The Hs 117H was an air-launched variant, designed to be launched from a Dornier Do 217, Junkers Ju 188, or Junkers Ju 388. [4] This version was designed to attack enemy aircraft up to 5 km (16,000 ft) above the launching aircraft. [5]

See also

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References