Encyclopedia entry RDKS engine series Original archive entry. The text, images and links below are kept as they were written. SubtopicsRDKS-100 Dushkin LOx/Kerosene rocket engine. Sanger. Developed 1946-51.RDKS-1 Russian rocket engine. Developed End 40's. Single chamber with turbopump propellant feed.RPD-04 Dushkin LOx/Kerosene rocket engine. Out of Production.