Encyclopedia Astronautica
Ariane 5-0


Solid propellant rocket stage. Loaded/empty mass 277,500/39,800 kg. Thrust 6,470.00 kN. Vacuum specific impulse 275 seconds. Solid rocket booster for Ariane 5. Nozzle expansion ratio increased from 9.7 to 11.0 after 1997. Chamber pressure 61.3 bar. HTPB propellant.

Cost $ : 22.000 million.

AKA: SPB235.
Status: Active.
Gross mass: 277,500 kg (611,700 lb).
Unfuelled mass: 39,800 kg (87,700 lb).
Height: 31.60 m (103.60 ft).
Diameter: 3.05 m (10.00 ft).
Span: 3.05 m (10.00 ft).
Thrust: 6,470.00 kN (1,454,510 lbf).
Specific impulse: 275 s.
Specific impulse sea level: 250 s.
Burn time: 129 s.
Number: 114 .

More... - Chronology...


Associated Countries
Associated Engines
  • P230 SNPE solid rocket engine. 6472.3 kN. In production. Isp=286s. 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
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

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