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Altair 3
Part of Altair Family
Star-20
Star-20
Credit: Thiokol
Thiokol solid rocket engine. In Production. 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.

AKA: 27.5-KS-6,100;Star 20;TEM640;TE-M-640-1. Status: In Production. Number: 39 . Thrust: 27.14 kN (6,100 lbf). Gross mass: 301 kg (663 lb). Unfuelled mass: 28 kg (61 lb). Specific impulse: 287 s. Burn time: 28 s. Diameter: 0.50 m (1.64 ft).

The lightweight, external nozzle is a composite of graphite, plastic, and steel. The consumable pyrogenic 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.



Country: USA. Launch Vehicles: Thor Burner 1, Scout B, Scout B 2A, Scout B-1, Scout B-1 F, Scout D-1, Scout D-1 F, Scout E-1, Scout F-1, Atlas F/MSD, Scout G-1, Atlas E/MSD, ASAT, Scout D, Atlas E Altair, Advanced Scout. Propellants: Solid. Stages: Altair 3. Agency: Thiokol. Bibliography: 410, 9622.

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