Tags: Aircraft.
Grigorovich DI-3 (Russian: Григорович ДИ-3) (Dvukhmyestnyi Istrebitel – two-seat fighter) was a prototype two-seat fighter developed in the Soviet Union in the 1930s. It was intended to be a long-range escort fighter developed from the DI-2 with improved range and performance comparable to single-seat fighter aircraft of the time. DI-3 was a single-bay biplane of mixed construction with a twin-rudder tailplane of variable incidence.