Aestus

Type: Upper Stage Engine
Country of Origin: Germany
Manufacturer: Astrium

First Flight: October 30, 1997
Status: Active

Propellant (O/F): Nitrogen Tetroxide/MMH
Mixture Ratio (O/F by mass): 1.9
Cycle: Pressure-fed

Thrust (vac.): 29.6 kN
Thrust (s.l.):
ISP (vac.): 324 s
ISP (s.l.):
Chamber Pressure: 11 bar (159 psi)
Burn time: 1100 sec
Nozzle Ratio: 84

Mass: 0.111 tons
Length: 2.2 m
Diameter: 1.31 m

Used in: Ariane 5 G, 5 ES

Links: