The development of the Viking 75 Orbiter propulsion subsystem has been completed and qualification is under way. This development required an extension of the Mariner Mars 1971 propulsion subsystem technology to meet the Viking 75 requirements of three times the burn time and five times the number of burns. Modifications have been incorporated into the rocket engine to increase the cooling margin for the 2700-second Mars orbit insertion burn. This capability has been demonstrated in both engine firings and subsystem tests. A new surface tension device has been developed to position the propellants (N2O4 and MMH) over the tank outlets during zero-g flight. Extensive scale model testing has been conducted to prove this propellant management concept. This subsystem will provide midcourse corrections, an orbit insertion burn and 20 orbit trims for the Viking 75 Spacecraft. The Viking Project is managed by the Langley Research Center, National Aeronautics and Space Administration.
Development of the propulsion subsystem for the Viking 75 Orbiter
Propulsion Conference ; 1973 ; Las Vegas, NV, US
1973-11-01
Aufsatz (Konferenz)
Keine Angabe
Englisch
The Viking Orbiter Visual Imaging Subsystem
NTRS | 1976
|The Viking Orbiter Visual Imaging Subsystem
AIAA | 1976
|The Viking Orbiter Visual Imaging Subsystem
AIAA | 1976
|