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LEX (sounding rocket)
French experimental sounding rocket From Wikipedia, the free encyclopedia
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LEX (French: Lithergol EXpérimentale) was a French experimental hybrid-propellant sounding rocket, developed by ONERA.[1][2][3][4] It had the objective of testing a lithergol fueled rocket engine (an hybrid mixture of solid and liquid propellants - Nylon-metatolueneamine as fuel and mixture of nitric acid and nitrogen tetroxide as oxidizer).[1] It was the first rocket in history to use this technology, flying 8 times between 1964 and 1967.[5][6][1]
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The rocket had a single stage with a thrust of 10.00 kN (MT.27 hybrid rocket motor), a gross mass of 100 kg, a height of 3.40 m, and a diameter of 0.16 m, reaching an apogee of 130 km.[6][1]
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All LEX launches were carried out from CERES Ile du Levant.[1]
The first LEX-01 launch on 25 April 1964 was a partial success, with the payload consisting of a telemetry transmitter.[5][6]
Three LEX-02 rockets were fired on 1 June 1965. One of these rockets, with an initial mass of 78 kg, reached an altitude of 68 km.[5][6]
Four LEX-02-B launches occurred on 1 November 1967. Two were intended as technological tests and two others as actual payload launches.[5][6] These carried the SECT Meteo meteorological payloads, reaching an altitude of more than 100 km, with a parachute ensuring a correct descent for 31 minutes allowing wind measurements over a wide range of altitudes.[5][1]
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