<page_title> Société d'Etudes pour la Propulsion par Réaction </page_title> <section_title> Mixed-power </section_title> <table> <cell> SEPR 631 <col_header> Engine </col_header> </cell> <cell> SO.9050 Trident II <col_header> Aircraft </col_header> </cell> <cell> Two chambers, independently selected to allow partial thrust <col_header>  </col_header> </cell> </table>
Trident II aircraft has the two chamber SEPR 631 engine.