Encyclopedia Astronautica
Ariane 5-2


N2O4/MMH propellant rocket stage. Loaded/empty mass 12,500/2,700 kg. Thrust 27.40 kN. Vacuum specific impulse 324 seconds. Storable propellant, restartable upper stage for use with Ariane 5. Chamber pressure 10 bar; expansion ratio 83.0; propellant mix ratio 2.05. Empty mass without VEB payload fairing support ring and avionics is 1200 kg.

Cost $ : 6.000 million.

AKA: L-9.
Status: Active.
Gross mass: 12,500 kg (27,500 lb).
Unfuelled mass: 2,700 kg (5,900 lb).
Height: 3.36 m (11.02 ft).
Diameter: 3.96 m (12.99 ft).
Span: 5.46 m (17.91 ft).
Thrust: 27.40 kN (6,160 lbf).
Specific impulse: 324 s.
Burn time: 1,100 s.
Number: 48 .

More... - Chronology...


Associated Countries
Associated Engines
  • Aestus Friedrichshafen N2O4/MMH rocket engine. 29 kN. In production. Isp=324s. Upper stage engine for Ariane 5 developed 1988 - 1995. Original version could not be restarted; version for EPS L10 stage for Ariane 5V allowed multiple restarts. First flight 1996. More...
  • L7 MBB N2O4/MMH rocket engine. 27.4 kN. In Production. Isp=320s. Used on Ariane 5 launch vehicle. First flight 1996. More...

Associated Launch Vehicles
  • Ariane 5G French orbital launch vehicle. Initial version of the Ariane 5, a bit too large for the main commercial geosynchronous communications satellite payloads. More...

Associated Propellants
  • N2O4/MMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Monomethylhydrazine (CH3NHNH2) is a storable liquid fuel that found favour in the United States for use in orbital spacecraft engines. Its advantages in comparison to UDMH are higher density and slightly higher performance. More...

Home - Browse - Contact
© / Conditions for Use