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Arianespace’s Ariane 5 is the world reference for heavy-lift launchers, able to carry payloads weighing more than 10 metric tons to geostationary transfer orbit (GTO) and over 20 metric tons into low-Earth orbit (LEO) – with a high degree of accuracy mission after mission.This performance ensures that Ariane 5 will be able to loft the heaviest spacecraft either in production or on the drawing boards, and enables Arianespace to match up most telecommunications satellites for highly efficient dual launches – a capability that has been proven by the company in Ariane-series missions since the 1980s.The payload fairing, mounted on the nose of the launch vehicle, protects satellites on the launch pad and during the initial trajectory through the Earth’s atmosphere.
Its thrust chamber is fed by two pumps (liquid hydrogen and liquid oxygen) driven by a gas generator, a common turbine and a gearbox.During the powered flight, the attitude control in pitch and yaw is ensured by gimballing of the engine’s nozzle, while gaseous hydrogen thrusters are used for roll control.During the ballistic phase, roll, pitch and yaw control uses clusters of gaseous hydrogen thrusters, while gaseous oxygen thrusters also are employed for longitudinal boosts.As the central element of Ariane 5, the core cryogenic stage serves as one of the launcher’s key propulsion systems.It carries a propellant load of 132.27 metric tons of liquid oxygen and 25.84 metric tons of liquid hydrogen to feed the stage’s Vulcain main engine.The Vulcain burns for just under 600 seconds, providing up to 116 metric tons of thrust in vacuum.The stage has an overall length of 30.5 meters from the Vulcain main engine’s nozzle to the forward (upper) skirt.Its dry mass is 12.2 metric tons, and the liftoff mass with its load of cryogenic propellant is 170.3 metric tons.After completing its propulsive mission, the empty stage is commanded to reenter the atmosphere for an ocean splashdown.Ariane 5 utilizes two solid boosters, each standing more than 30 meters tall with 237.8 metric tons of propellant.The boosters are ignited on the launch pad once the main cryogenic stage’s Vulcain engine has stabilized its thrust output.