BrF5/MMH

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BrF5/MMH

BrF5/MMH propellant. No engines reached the operational stage using this storable propellant combination. The handling problems and safety risks of the toxic bromine pentafluoride oxidizer outweighed the performance benefits. Monomethylhydrazine (CH3NHNH2) is a storable liquid fuel that found favor in the United States for use in orbital spacecraft engines. Its advantages in comparison to UDMH are higher density and slightly higher performance.

Specific impulse: 236 s. Specific impulse sea level: 236 s.

Optimum Oxidizer to Fuel Ratio: 3.55. Temperature of Combustion: 3,265 deg K. Density: 1.77 g/cc. Oxidizer Density: 2.480 g/cc. Oxidizer Freezing Point: -63 deg C. Oxidizer Boiling Point: 41 deg C. Fuel Density: 0.880 g/cc. Fuel Freezing Point: -52 deg C. Fuel Boiling Point: 87 deg C.

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