ClO3F/MMH
Propellant
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ClO3F/MMH propellant. No engines reached the operational stage using this propellant combination; perchloryl fluoride had better performance using hydrazine fuel. 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.
Optimum Oxidizer to Fuel Ratio: 2.67. Temperature of Combustion: 3,540 deg K. Density: 1.20 g/cc. Oxidizer Density: 1.430 g/cc. Oxidizer Freezing Point: -146 deg C. Oxidizer Boiling Point: -47 deg C. Fuel Density: 0.880 g/cc. Fuel Freezing Point: -52 deg C. Fuel Boiling Point: 87 deg C.