The Frigate Ecojet (in Russian: Фрегат Экоджет, transliterated as Fregat Ekodzhet) 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 Tu-304 under the leadership of Valentin Klimov (then chief designer of Tupolev design bureau) and initially was projected to carry up to 500 passengers. Since 2004 the project is carried out by a new design bureau, instituted as the daughter company of Tupolev and headed by the elder Klimov, while the company is headed by Klimov's son, Alexandr Klimov.
The primary goal of the Frigate Ecojet program is the development of a range of new wide body medium-haul aircraft which will be operational by 2018.
The plane is projected to have a range between 3,000–4,000 km.
The new wide body aircraft uses a oval fuselage configuration.The chosen form ensures minimal dimensions for the aircraft with 300-350 passengers in three cabins, three main aisles, no less than 500 mm (20 inches) wide and spaces between seats no less than 810 mm (32 inches). In an all-economy layout the number of seats can be increased to 400. The aircraft can accommodate 302 passengers in a basic three class layout (Business Class, Premium Economy and Economy).