AVUM
Stage · Italy
Original archive entry. The text, images and links below are kept as they were written.
N2O4/UDMH propellant rocket stage. The AVUM propulsion module was composed of a UDMH/NTO bipropellant main engine with a re-ignition capability and a cold gas attitude control system, based on two clusters of three thrusters, each having a 50 N thrust.
The AVUM upper stage performed the following functions:
- roll control during second, third and fourth stage flights
- attitude control during coasting phase
- correction of axial velocity error due to solid rocket motor
- performance scatter
- generation of the required velocity change for orbit circularization
- satellite pointing
- payload(s) release maneuvers
The AVUM avionics module provided the following services:
- flight control and mission management
- telemetry
- localization and neutralization
- power supply and distribution