The CS.1 turboprop of Hungarian engineer György Jendrassik had an incredibly advanced design for its time.

-He made the first turboprop that was on the verge of testing in August 1940.

“Jendrassik CS.1”

“Jendrassik schematic drawing”

“Jendrassik at the Közlekedesi Museum”

-The troubled situation of those moments prevented its progress.

-Jendrassik worked at the Ganz railway workshops. Already in 1937 he made run a 100 CV turboprop.

“Varga RMI-1XH with Jendrassik CS.1”

-The CS.1 was planned for 1,000 hp at 13,500 rpm. It had a long 15-stage axial compressor and an excessive 11-stage turbine.

-It was planned to be installed on the Varga RMI-1, Hungarian military twin engine aircraft.

From Appendix 6: Geörgy Jendrassik, who was trained in Budapest and Berlin, began working at the Ganz factory in 1927, and became renowned in the development of 1 to 6 cylinder diesel engines.

“Geörgy Jendrassik”

-Later he became interested in gas turbines, building a turboprop that has gone down in history by the time it was made (1938) and for the performance it provided.

-Being a pioneer, he presented some beautiful and advanced lines and design. Currently it can be compared with engines of similar architecture.

“Jendrassik turboprop”

-In the patent description it was expressed curiously like this: “It is an internal combustion engine that transforms the thermochemical energy of the fuel into heat and this one into mechanical energy”