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The Charomskiy M-40 was a Soviet turbocharged aircraft Diesel engine developed during World War II .. Soviet. Soviet Union. turbocharged. turbocharger. aircraft Diesel engine. aircraft Diesel engine. It was used in a few Petlyakov Pe-8 heavy bombers until August 1941 when it was removed , because it was unreliable at high altitudes .. Petlyakov Pe-8. Petlyakov Pe-8. The engines were stored until 1944 when they were disassembled and their components were used in the closely related Charomskiy ACh-30B .