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Tests show that lightweight carbon-fibre reinforced plastic is strong enough to replace metal used in upper-stage rocket structures. This is an important milestone in Europe for the development of a prototype of a highly-optimised ‘black’ upper stage, Phoebus, a joint initiative by MT Aerospace and ArianeGroup, funded by ESA’s Future Launchers Preparatory Programme.
MT Aerospace tested the strength of a subscale oxidiser tank made from carbon-fibre reinforced plastic.
During these tests, the tank was filled and drained multiple times, pressurised beyond operational limits and shock tested to ensure no ignition event of the oxygen tank. Sensors monitored pressure, temperature, strain or a possible leakage. The analysis of the results and the overall good structural integrity of the tank prove the technology for use in a Phoebus upper stage.