RE: What turbine to use for the Yellow A-4 Skyhawk??
Jet International published a test of a 54 with the thrust measurements and the pipe dimensions, I believe the thrust increase was 5%, no exhaust velocity measurements. I'll see if I can dig it out. Shok and I had a pipe built to the design for a Maverick, I forget the turbine, Shok?
Great article, you will learn a lot about exhaust to tailpipe dimensions.
Bob