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Ivan Platonovich Grave (Иван Платонович Граве in Russian) (25 November [O.S. 13 November] 1874 in Kazan – March 3, 1960 in Moscow) was a Russian and Soviet scientist in the field of artillery, Doctor of Technical Sciences (1939), professor (1927), member of the Academy of Artillery Sciences (1947-1953), Major General of the Engineer Corps (1942).
Ivan Grave graduated from the Mikhailovskoye Artillery School (1895) and Mikhailovskaya Artillery Academy (1900), where he would begin to teach four year later. In 1916, Grave invented a missile powered by smokeless powder and launched from mobile launchers, and first experiments of primitive liquid-fueled rockets, and therefore he is also known as father of Katyusha. In 1918, he participated in creating the RKKA Artillery Academy, where he would work as a head of studies and head of a department until 1943. Ivan Grave was one of the founders of the Soviet school of internal ballistics. Ivan Grave authored two major works called Internal Ballistics (Внутренняя баллистика) (1933-1938) and Ballistics of Semiclosed Space (Баллистика полузамкнутого пространства) (1940).
In 1938 Ivan Grave was arrested under the false accusation of participating in the "Military-Fascist Plot," but was released in February 1939 after denunciation of "Yezhovshchina" (the reign of the then NKVD chief Yezhov) and during campaign against slander by Joseph Stalin's order as a particularly valuable specialist.