Konstantin Fyodorovich Chelpan (Russian: Константин Фёдорович Челпан; 27 May 1899 – 10 March 1938) was a prominent Soviet engineer of Greek background.

Born on 27 May 1899 in Cherdakly, Yekaterinoslav Governorate, Russian Empire (now Kremenivka, Donetsk Oblast, Ukraine),[1] to Fyodor Myhailovich Chelpan and Elizaveta Khalangot.

[2] Konstantin Chelpan was the head designer of the famous T-34 tank diesel engine V-2,[6] for which he was awarded the Order of Lenin.

[1][2][11] He was charged with leading a Greek nationalist counter-revolutionary organization, as well as conspiring to sabotage the Kharkiv Locomotive Factory.

[1] In a few years his wife received a death certificate, indicating that Konstantin Chelpan died on 16 May 1942 from congestive heart failure.