400N Bipropellant Apogee Motors – For apogee orbit injection of geostationary satellites and for deep space trajectory and planetary orbit missions. Since 1974, our bipropellant apogee motors have controlled numerous international satellites, spacecraft and deep space probes with 100% success. During that time, multiple refinements have been implemented to further increase performance and reliability whilst maintaining low production costs.
Off-the-Shelf Apogee Motors – Two models of 400N apogee motor are available off-the-shelf with almost identical performance. The main criterion for selecting a particular model is the available volume in the spacecraft for accommodating the motor.
The difference between the two models is the size of the expansion nozzle. Model S400-15 is equipped with a larger nozzle and therefore operates at 1% higher efficiency than the smaller model S400-12. Both models are available with propellant valves from either a US supplier, or from ArianeGroup, depending on customer’s requirements. When fitted with the ArianeGroup valve, the engine becomes an all European product.