The brief encyclopedia of aircraft developed in the USSR on the eve and during the Second World War and in service with the Red Army presents designs of aircraft (including double-boom and double-fuselage “tailless” and “flying wings”), projectile aircraft, composite aircraft, helicopters, gyroplanes, gliders, tiltrotors, ring gliders, hovercraft, cruise missiles, etc. Vehicles that were mass-produced or in experimental batches and that took part in combat or auxiliary operations are considered. It also talks about experimental aircraft, the planned production of which was interrupted by the end of the war, aircraft that, for one reason or another, were not mass-produced, captured aircraft received under Lend-Lease, and licensed-built aircraft that were put into service. The book provides the main characteristics of aircraft and information about the combat operations in which they were used. The book is equipped with a large amount of illustrative material and is intended for a wide range of readers.