Another non-toxic replacement for hydrazine monopropellant has passed ground testing, paving the way for a satellite flight test as early as 2015. Ball Aerospace and Aerojet Rocketdyne say their system, which uses a hydroxyl ammonium nitrate (HAN) mixture designated AF-M315E, with a special catalyst, has greater density than hydrazine for better storage efficiency, and produces better performance. “When we look at this compared to a hydrazine monopropellant type of system, where we ...


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