Encyclopedia Astronautica
TOS


Solid propellant rocket stage. Loaded/empty mass 10,960/1,130 kg. Thrust 185.10 kN. Vacuum specific impulse 296 seconds. IUS-2 stage with simplified electronics.

AKA: Transfer Orbit Stage.
Status: Retired 2004.
Gross mass: 10,960 kg (24,160 lb).
Unfuelled mass: 1,130 kg (2,490 lb).
Height: 3.29 m (10.79 ft).
Diameter: 2.34 m (7.67 ft).
Span: 2.34 m (7.67 ft).
Thrust: 185.10 kN (41,612 lbf).
Specific impulse: 296 s.
Specific impulse sea level: 115 s.
Burn time: 144 s.
Number: 10 .

More... - Chronology...


Associated Countries
Associated Engines
  • SRM-1 CSD solid rocket engine. 181.5 kN. Used in TOS; IUS-1 on Shuttle, Titan 34D. Known by manufacturer as Orbus 21. Propellant: 86% solids made up of HTPB UTP-19360A. Shape: cylindrical. Isp=296s. First flight 1982. More...

Associated Launch Vehicles
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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