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 primary goal of the Frigate Ecojet program was the development of a range of new wide-body medium-haul aircraft, intended to be operational by 2018.

Sergey Grachev, director of marketing sales for the Frigate Ecojet stated 'It is impossible to develop and create this kind of aircraft here'.

[5] When moving to Europe the company will also seek to harmonize cockpit design with a competitor to reduce pilot training costs.

In August 2017, initially powered by 177–226 kN (40,000–51,000 lbf) PD-18R or PS-90A20 but lacking modern engines, the twinjet was modified into a Freejet four-engined design powered by modern 12–14 tf (26,000–31,000 lbf) engines introduced for the single-aisle market: the Irkut MC-21's Aviadvigatel PD-14, the Pratt & Whitney PW1100G or the CFM International LEAP powering the A320neo and the B737 MAX, losing a little in aerodynamics and weight and raising the maximum take-off weight from 130 to 140 t (290,000 to 310,000 lb) for a range of 3,500 km (1,900 nmi) for 300 passengers in an all-economy 10-abreast triple-aisle cabin, increasing to 4,680 km (2,530 nmi) with 244 passengers; it has a wingspan of 48.53 m (159.2 ft) and over length of 49.65 m (162.9 ft) with eight emergency exits.