ICM 72210 Biplanes of the 1930s and 1940s He-51A-1, Ki-10-II, U-2/Po-2VS 1:72

The Polikarpov Po-2 (also U-2, for its initial uchebnyy, 'training', role as a flight instruction aircraft) served as an all-weather multirole Soviet biplane, nicknamed Kukuruznik (Russian: Кукурузник, NATO reporting name "Mule"). The reliable, uncomplicated design of the Po-2 design made it an ideal trainer aircraft, as well as doubling as a low-cost ground attack, aerial reconnaissance, psychological warfare and liaison aircraft during war, proving to be one of the most versatile light combat types to be built in the Soviet Union. As of 1978 it remained in production for a longer period of time than any other Soviet-era aircraft.

Production figures for Polikarpov U-2 and Po-2 bombers and trainers combined are between 20,000 and 30,000[2] with production ending as early as 1952. Precise figures are hard to obtain since low-rate production by small repair shops and air clubs likely continued until 1959.

The Heinkel He 51 was a German single-seat biplane which was produced in a number of different versions. It was initially developed as a fighter; a seaplane variant and a ground-attack version were also developed. It was a development of the earlier He 49.

The Kawasaki Ki-10 (九五式戦闘機, Kyūgo-shiki sentōki, Army Type 95 Fighter) was the last biplane fighter used by the Imperial Japanese Army, entering service in 1935. Built by Kawasaki Kōkūki Kōgyō K.K. for the Imperial Japanese Army, it saw combat service in Manchukuo and in North China during the early stages of the Second Sino-Japanese War. Its reporting name given by the Allies was "Perry".