Konstantin Alekseevich Kalinin (Russian: Калинин Константин Алексеевич; born 17 December (29) 1889 in Warsaw, Russian Empire; died 1938 or 21 April 1940 in Voronezh) was a World War I aviator and Soviet aircraft designer.
Kalinin was arrested on 1 April 1938 in Voronezh during the Great Purge. While in prison, he designed the K-15 delta-wing rocket fighter. Seven months after his arrest on 22 October, at a closed court hearing of the Military Collegium of the Supreme Court of the Soviet Union, which lasted 10 minutes without defense or witnesses, Kalinin was accused of anti-Soviet activities and espionage and sentenced to death.
The same day (according to some sources the next day, 23 October), Kalinin was executed in the basement of the NKVD prison in Voronezh.[2] According to Soviet records, he died in 1940.