Engine Model: Star 10. Manufacturer Name: TE-M-195. Government Designation: SARV Retro MK I. Other Designations: 9.00-KS-755. Designer: Thiokol. Gross Mass: 18 kg (39 lb). Empty Mass: 6.00 kg (13.20 lb). Propellants: Solid. Thrust(vac): 3.353 kN (754 lbf). Isp: 251 sec. Burn time: 9.00 sec. Diameter: 0.25 m (0.83 ft). Chambers: 1. Country: USA. Status: In Production. Flown: 46. SARV Retro MK I is a small, high-performance motor designed for use as a retrograde rocket for an unmanned satellite vehicle. The design requirements resulted in an unusually short-length, large-diameter shape. This motor employs an internal-burning case-bonded grain with a star configuration. For all future deliveries, changes will be made to this design. Due to the unavailability of outdated materials, the main grain propellant will be changed from TP-G-3012 to TP-H-3340. Because of the higher flame temperature of the TP-H-3340 propellant, the molybdenum throat insert will be changed to G-90 graphite material. Total impulse 2,992 kgf-s. Propellant mass fraction 0.676.
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