Encyclopedia Astronautica
Star 20



star20.jpg
Star-20
Credit: Thiokol
Thiokol solid rocket engine. 27.135 kN. In Production. Isp=286s. Altair III was developed as the propulsion unit for the fourth stage of the Scout launch vehicle. A filament-wound, fiberglass-epoxy case contained the CTPB propellant grain.

The lightweight, external nozzle is a composite of graphite, plastic, and steel. The consumable pyrogen igniter is actuated by two 6-second-delay electrical initiators or two SBASI zero-time-delay initiators. Total impulse 78,670 kgf-s. Propellant mass fraction 0.908.

Propellant Formulation: CTPB.

AKA: 27.5-KS-6,100; TE-M-640-1; Altair 3.
Status: In Production.
Gross mass: 301 kg (663 lb).
Unfuelled mass: 28 kg (61 lb).
Diameter: 0.50 m (1.64 ft).
Thrust: 27.14 kN (6,100 lbf).
Specific impulse: 287 s.
Burn time: 28 s.
Number: 39 .

More... - Chronology...


Associated Countries
See also
Associated Manufacturers and Agencies
  • Thiokol American manufacturer of rocket engines and rockets. Thiokol Corporation, Ogden, UT, USA. 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...

Bibliography
  • Thiokol Corporation Web Site, As of May, 1999. Web Address when accessed: here.

Associated Stages
  • Star 20 Solid rocket stage. 27.14 kN (6,100 lbf) thrust. Mass 301 kg (664 lb). More...

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