The Aestus from Arianespace is a Satellite Launch Vehicle Engine with a vacuum thrust of 29.6 kN and a specific impulse of 324 s. This engine uses N2O4\MMH propellants and has a propellant flow rate of 9.3 Kg/sec. It can generate power of up to 59400 hp and has multiple re-ignition capabilities. The engine features radiatively cooled nozzle extensions and propellant valves for fuel and oxidizers that are pneumatically operated by pilot valves. It has a thrust chamber mass of 111 Kg and an overall engine length of 2.2 m. This engine is ideal for orbital insertion of heavy payloads into low-earth orbit, sun-synchronous orbit, and geostationary transfer orbit.