In-space testing of a U.S.-developed “green” hydrazine replacement as a propellant for spacecraft thrusters is a step closer, with the completion of hot-fire testing at Aerojet Rocketdyne’s Redmond, Washington, facility. Designated AF-M315E, the propellant is destined for the Green Propellant Infusion Mission, which will carry four 1N thrusters like the one tested in Redmond, and one 22N thruster. A flightlike version of that unit is scheduled for testing later this ...


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