Engine Model: Star 31. Manufacturer Name: TE-M-762. Government Designation: Antares 3. Other Designations: 45-KS-18,500. Designer: Thiokol. Gross Mass: 1,384 kg (3,051 lb). Empty Mass: 98 kg (216 lb). Propellants: Solid. Thrust(vac): 80.000 kN (17,984 lbf). Isp: 294 sec. Burn time: 45 sec. Diameter: 0.76 m (2.50 ft). Chambers: 1. Country: USA. Status: In Production. Flown: 18. Antares III is the third-generation third stage for Vought Corporation's Scout launch vehicle. Propellant: AP/HTPB/Al propellant in a filament wound Kevlar case and a Thrust: 80 kN average. The design incorporates an 89-percent-solids HTPB propellant in a Kevlar(r) filament-wound case insulated with silica-filled EPDM rubber. Carbon/phenolic nozzle with a carbon/carbon throat insert. Total impulse 380,883 kgf-s. Propellant mass fraction 0.929.
