Encyclopedia Astronautica
Zefiro 9


Solid propellant rocket stage. Loaded/empty mass 11,100/1,000 kg. Thrust 313.00 kN. Vacuum specific impulse 294 seconds. 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.

Propellant Formulation: HTPB 1912.

Status: In production.
Gross mass: 11,100 kg (24,400 lb).
Unfuelled mass: 1,000 kg (2,200 lb).
Height: 3.85 m (12.63 ft).
Diameter: 1.90 m (6.20 ft).
Span: 1.90 m (6.20 ft).
Thrust: 313.00 kN (70,365 lbf).
Specific impulse: 294 s.
Burn time: 117 s.

More... - Chronology...


Associated Countries
Associated Engines
  • Zefiro 9 Fiat-Avio solid rocket engine. 313 kN. In production. Isp=294s. Motor derived from the 16-metric-ton Zefiro 16. Carbon epoxy filament wound case; low density EPDM insulation; HTPB 1912 composite propellant. More...

Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

Home - Browse - Contact
© / Conditions for Use