Peter Dmitrievich Grushin (Russian: Пётр Дмитриевич Грушин, January 15, 1906, Volsk, Russian Empire — November 29, 1993) was a Soviet rocket scientist and, from 1966, an academician of the Academy of Sciences of the USSR.Grushin graduated from Moscow Aviation Institute, where he participated in the development of the MAI Stal plane (Russian: "Сталь", 1931–1934).