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Zefiro 9
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Designer: Fiat-Avio. Gross Mass: 11,100 kg (24,400 lb). Empty Mass: 1,000 kg (2,200 lb). Propellants: Solid. Thrust(vac): 313.000 kN (70,365 lbf). Isp: 294 sec. Burn time: 117 sec. Diameter: 1.90 m (6.20 ft). Length: 1.74 m (5.70 ft). Chambers: 1. Chamber Pressure: 74.00 bar. Area Ratio: 56.00. Country: Italy. Status: In production. The Zefiro 9 was derived from a 16-tonne solid rocket motor development (Zefiro 16) initiated by Fiat-Avio, now Avio S.p.A., with company funding and contracted by the Italian space agency ASI. The Zefiro-16 motor had already completed three successful firing tests by the end of 2006. The Zefiro-9 motor features included: a 1.9 m diameter carbon epoxy filament wound case; a low density EPDM insulation; HTPB 1912 composite propellant; a nozzle based on a flexible joint technology; a consumable igniter; and an electromechanical thrust vector control system.
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