The Frigate Ecojet, is a program for the development of a new wide-body medium-haul civil aircraft using new aerodynamic, and design configurations. The project started in 1991 as the twinjet Tu-304 under the leadership of Valentin Klimov, being initially projected to carry up to 500 passengers. Since 2004 the project has been carried out by a new design bureau, led by Valentin Klimov and instituted as a daughter company of Tupolev, headed by Valentin Klimov's son, Alexandr Klimov. Since 2017, the quadjet aircraft design has been branded the Frigate Freejet.
