N2O4/Hydrazine
Propellant
Original archive entry. The text, images and links below are kept as they were written.
N2O4/Hydrazine propellant. Hydrazine (N2H4) found early use as a fuel, but it was quickly replaced by UDMH, and this combination was not used in any production motors.
Optimum Oxidizer to Fuel Ratio: 1.34. Temperature of Combustion: 3,250 deg K. Ratio of Specific Heats: 1.25. Density: 1.22 g/cc. Characteristic velocity c: 1,780 m/s (5,830 ft/sec). Isp Shifting: 292 sec. Isp Frozen: 283 sec. Oxidizer Density: 1.450 g/cc. Oxidizer Freezing Point: -11 deg C. Oxidizer Boiling Point: 21 deg C. Fuel Density: 1.008 g/cc. Fuel Freezing Point: 2.00 deg C. Fuel Boiling Point: 113 deg C.