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Dassault Mystère IV

Dassault · Fighter / Attack · France · Early Jet (1946–1969)

Dassault Mystère IV — Fighter / Attack
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The Dassault Mystère IV was a French single-seat single-engine swept-wing jet fighter-bomber — the direct successor to the straight-wing Ouragan + France's first front-line swept-wing fighter. Marcel Dassault designed the Mystère IV in 1950-1952; the prototype first flew on 28 September 1952. About 421 Mystère IVAs were built between 1954 and 1958 at Bordeaux-Mérignac. The aircraft served the French Air Force + Indian Air Force + Israeli Air Force in front-line roles 1954-1970s.

The Mystère IVA used a Hispano-Suiza Tay 250A turbojet (6,250 lbf — French licence-built Rolls-Royce Tay). Maximum speed 1,100 km/h at sea level (transonic), range 1,300 km, service ceiling 15,000 m. Armament: 2 × 30 mm DEFA 552 cannons + 8 × wing-mounted unguided rockets + up to 900 kg of bombs / drop tanks. Crew: 1. The aircraft was the first French fighter to approach Mach 1 in level flight (~Mach 0.95) + introduced the swept-wing layout to French Air Force service.

Mystère IV combat service was extensive in Israeli + Indian operators. Israeli Air Force operated 60 Mystère IVAs in front-line service; the type famously achieved Israel's first jet-vs-jet air combat kill — on 12 April 1956 Israeli pilot Aharon Eisenfeld in a Mystère IVA shot down an Egyptian MiG-15 over the Sinai. Indian Air Force operated 110 Mystère IVAs 1957-1973 with combat use in the 1965 India-Pakistan War. About 5 Mystère IVA airframes survive in 2026 at French + Indian + Israeli museums.

For Kids — a shorter, friendlier version

The Dassault Mystère IV was France's first swept-wing fighter jet. The word Mystère means 'Mystery' in French. The plane was the next step after the straight-winged Ouragan. Swept wings let the Mystère IV fly closer to the speed of sound.

The Mystère IV first flew on 28 September 1952. About 421 were built between 1954 and 1958 at the Bordeaux-Mérignac factory. The plane is about as long as a city bus.

The Mystère IV used a French-built copy of the British Rolls-Royce Tay engine. Its top speed was 685 mph at low altitudes. The plane carried two big 30 mm cannons and eight wing-mounted rockets. It could also carry up to 900 kg of bombs.

The French Air Force flew the Mystère IV for many years. Israel also flew Mystère IVs during the Six-Day War in 1967. India bought Mystère IVs too and used them during the 1965 war with Pakistan. The plane stayed in service until the 1970s.

Fun Facts

  • The Mystère IV was France's first swept-wing fighter jet.
  • The word Mystère means 'Mystery' in French.
  • About 421 Mystère IVs were built between 1954 and 1958.
  • The plane carried two big 30 mm cannons and eight rockets.
  • Israeli Mystère IVs saw lots of combat during the 1967 Six-Day War.
  • India also flew the Mystère IV during its 1965 war with Pakistan.

Kids’ Questions

Why are swept wings better for fast planes?

When a plane flies near the speed of sound, the air starts to pile up in front of the wings. Swept wings — wings that angle back from the body — let the air slide along the wing instead of piling up. This means a swept-wing plane can fly closer to the speed of sound before its wings start to shake.

How is the Mystère IV different from the Ouragan?

The Ouragan had straight wings sticking out from the body. The Mystère IV had swept wings that angled back. The Mystère IV also had a more powerful engine. These changes made the Mystère IV about 100 mph faster than the Ouragan.

Variants

Mystère IVA (basic)
Standard production. About 421 built.
Mystère IVB (afterburner prototype)
Proposed afterburning variant. ~5 prototypes; not produced.

Notable Operators

French Air Force (1954-1980)
Lead operator. ~180 Mystère IVAs in front-line + reserve service.
Indian Air Force (1957-1973)
About 110 Mystère IVAs. 1965 India-Pakistan War combat use.
Israeli Air Force (1956-1971)
60 Mystère IVAs. 1956 Suez + 1967 Six-Day War combat use. First jet-vs-jet kill on 12 April 1956.

Frequently Asked Questions

What was Israel's first jet-vs-jet kill?

On 12 April 1956, Israeli pilot Aharon Eisenfeld flying a Mystère IVA shot down an Egyptian MiG-15 over the Sinai during a pre-Suez-Crisis reconnaissance encounter. The kill was Israel's first jet-vs-jet air combat victory — predating the Suez Crisis by 6 months. The Mystère IV's swept-wing transonic performance gave Israeli Air Force technological parity with the Soviet-supplied Egyptian MiG-15s, marking a key Israeli-Egyptian arms-race milestone.

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