 The machine tools and accrued tools and measuring instruments ended being taken over and then sold at auction by the government.Meanwhile, In 1945, for the Ministry of Communications, he projected the construction of the high voltage line between Otwock and Miłosna suburbs.During 1945 and 1946, Chyliński took part in an open competition of the Civil Aviation Department for developing a training glider, in which he won the first prize with his project of a motor glider, the HWL Pegaz.