With that exception the design was otherwise very conservative, a series of six flame cans were used for combustion instead of a single annular burner, and the compression ratio was kept low at 3.14:1.
Franz decided to focus on development time-to-market instead of performance in order to avoid having the program killed off if it didn't produce a working engine quickly.
The new 004B version included a number of changes, but ran into difficulty with vibration and fatigue problems that greatly delayed its service entry.
After the war Franz moved to the United States as part of Operation Paperclip,[6] and worked for a time with the USAF on engine-related issues at Wright-Patterson Air Force Base.
[8] He died in 1994, holder of the U.S. Army Outstanding Civilian Service Medal, the R. Tom Sawyer Award from the American Society of Mechanical Engineers, the Austrian Decoration of Honour for Science and Art,[9] and the Grand Decoration of Honour in Gold with Star for Services to the Republic of Austria.