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March 13, 2000

The development of a low-toxicity fuel that ignites on contact (hypergolic) with nitrogen tetroxide or inhibited red fuming nitric acid (IRFNA) has been announced. A recent test successfully demonstrated that the experimental fuel could be used for rocket propulsion that uses Aerozine-50, a carcinogenic hypergolic fuel. Known as Competitive Impulse, Non-Carcinogenic Hypergol or CINCH, the new fuel has been in development since 1994, and is a safer all-purpose replacement for a wide variety of hydrazine and hydrazine-based fuels. In 1998 CINCH was successfully tested in a monopropellant thruster. Theoretical calculations also indicate that CINCH performs better than RP-1 with hydrogen peroxide or liquid oxygen. Demonstration projects with Edwards Air Force Base and the Marshall Space Flight Center are planned, using hydrogen peroxide and liquid oxygen with CINCH. NASA plans to pursue the concept of using CINCH with several different oxidizers, and as a monopropellant in a launch vehicle. This concept would greatly reduce logistical costs, since only one fuel would be necessary for an entire mission. Unlike many developmental fuels, CINCH is commercially available. For example, 3M has a pilot plant producing CINCH to meet numerous requests from liquid propulsion developers.

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March 13, 2000

Andrews Space & Technology