Thanks again!
More questions to come...
What is the range of the vertical efficiency axis?
What do the descriptions in the diagram point to?
In the meantime i looked at the frequencies from the audio part of this onboard video of the TS030 (
http://www.youtube.com/watch?v=3cpGOAA1YlA ) and calculated from that a maximum engine rpm of about 5200 rpm. Can anybody confirm this rev?