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astronautix.com Star 20B
Star-20B
Star-20B -

Credit: Thiokol. 1,258 bytes. 110 x 40 pixels.

Manufacturer Name: TE-M-604-4. Other Designations: 30.1-KS-5,500. Designer: Thiokol. Gross Mass: 307 kg. Empty Mass: 33 kg. Propellants: Solid Thrust(vac): 2,495 kgf. Isp: 289 sec. Burn time: 30 sec. Diameter: 0.5 m. Chambers: 1. Country: USA. Status: In Production. Flown: 11. References: 410 .

A modified version of the STAR 20. The STAR 20B motor has increased case structural capability over the standard STAR 20. A filament-wound, fiberglass-epoxy case contains the CTPB propellant grain. The lightweight, external nozzle is a composite of graphite, plastic, and steel. The consumable pyrogen igniter is actuated by two SBASI zero-time-delay initiators. Total impulse 79,155 kgf-s. Propellant mass fraction 0.893.

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Last update 12 March 2001.
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