Skip to content
79,433 pages · 13,741 images · since 1994 Browse A–Z Today in space history
Encyclopedia Astronautica The full story of spaceflight
Encyclopedia entry

Viking 4B

Engine · France

Original archive entry. The text, images and links below are kept as they were written.

SEP N2O4/UDMH rocket engine. Used on Ariane 4. First flight 1984.

Thrust (sl): 571.100 kN (128,388 lbf). Thrust (sl): 58,237 kgf. Engine: 850 kg (1,870 lb). Chamber Pressure: 58.50 bar. Area Ratio: 30.8. Thrust to Weight Ratio: 99.3791224512388. Oxidizer to Fuel Ratio: 1.7. Coefficient of Thrust vacuum: 1.84359746305747. Coefficient of Thrust sea level: 1.31710173656174.

Country
France
Propellants
N2O4/UDMH