VEGA C: 2° stage - Z40 Motor -
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VEGA C: 2° stage – Z40 Motor


Avio is responsible for the Zefiro 40 motor – the second stage propulsion system in the  Vega C configuration. Avio’s self-financed development of the Zefiro 40 began in 2011, with the goal of surpassing the intrinsic limits of the Zefiro 23. The objective of the program is to develop a standard engine using cutting-edge architectures and technologies.

Although the Zefiro 40 was developed for use on the Vega C, it is perfectly suited to the latter’s subsequent versions, such as the Vega E. As compared with predecessor Zefiro 23, the new engine has higher average pressure, improved structural design margins for the casing and propellant grain, and a flexible joint with low resistant torque.

Main characteristics

  • Motor length: 7,6 m
  • Diameter: 2,3 m
  • Propellant mass: 36,2 t
  • Motor dry mass: 3006 kg
  • Motor case mass: 2080 kg
  • Average thrust: 1304 kN
  • Specific impulse: 293,5 s
  • Combustion time: 92,9 s

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