The Astris upper stage engine
The Astris upper stage engine
The Astris upper stage engine - From 1966, the Astris upper stage engine was tested under high-altitude conditions on the P4 test stand. The site engineers developed special steam generators for the operation of the high-altitude system. Since the 1970s, the P4 stand has been retrofitted several times for the Ariane programme. Today, Ariane’s Aestus and Vinci upper-stage engines are tested there.
