The Grigorovich E-2, or DG-55 (Russian Григорович Э-2, ДГ-55), was a two-seat, twin-engined, low-wing, prototype sport aircraft of Soviet origin.
Inspired by the de Havilland DH.88 Comet racer which had won the MacRobertson Air Race in 1934, the Grigorovich OKB began work on a similar aircraft.
Like the DH.88, the Russian "Kometa" was a highly streamlined conventional low-wing monoplane with twin engines forward of retractable main undercarriage in nacelles under each wing.
Intended to be a lightweight, high-speed sport aircraft the DG-55, later designated the E-2, was slightly smaller than the DH.88 and with less powerful engines, using the 120 hp (89 kW) Cirrus Hermes.
Following completion of its flight tests, the E-2 Kometa was handed over to the OSOAVIAKhIM paramilitary sports organisation, who used it for light liaison duties.