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CF2/Hydrazine
CF2/Hydrazine propellant. No engines reached the operational stage using this propellant combination. CF2 was a free radical considered as a rocket oxidizer in the 1950's. It proved too unstable for use. Hydrazine (N2H4) found early use as a fuel, but it was quickly replaced by UDMH.

Specific impulse: 321 s. Location: 2085.

Optimum Oxidizer to Fuel Ratio: 1.5. Temperature of Combustion: 4,030 deg K. Density: 1.26 g/cc. Characteristic velocity c: 2,085 m/s (6,840 ft/sec). Isp Shifting: 345 sec. Isp Frozen: 321 sec. Oxidizer Density: 1.520 g/cc. Fuel Density: 1.008 g/cc. Fuel Freezing Point: 2.00 deg C. Fuel Boiling Point: 113 deg C.

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