Unknown engine from which more information is sought. From the year 1930.

-And we obtained this information in Revision #3 of this publication: It is a project presented by Maurice Roy, as early as 1930!

"Maurice Roy's Project"

-As we see, the approach is very similar to some engines that appeared later.

-The centrifugal compressor cascades would be used by turboprops like the Rolls Royce Dart.

-Chambers and turbines are in the same sequence as all current gas turbines.