Doctor Alan Arnold Griffith designed a Contrafan-type gas turbine engine, with a contra-rotating fan, and with some principles that are still used today.

-The different fan stages are contra-rotating, without guide vanes. The annular combustion chamber is in the front of the engine, with inverted flow and a long axial compressor. It was known as the CR.1 type.

“The first Griffith patent”

“Griffith engine installation”

-In the above illustration, we see an imaginary installation of the Griffith engine.

-We obtained a photograph of A.A. Griffith at the time he was recruited by Hives for Rolls-Royce, in 1939.

“Mr. Griffith"

-He continued in RR until his retirement in 1960.

From Appendix A6/6: It seems that in one of the "Heritage Rolls-Royce" stores there is the "core" of the Griffith CR-1 engine that is already covered in the main text.

-Now we have the following illustration that lacks the surrounding part, turbofans, etc.

“Griffith CR-1 core”