Hello GasTurb, GSP, PROOSIS and NPSS users!
You need compressor maps for your performance studies? I can generate them for you! 

The source of your map may be a figure from a publication, calculated or measured data as text file, and input data from your favourite performance program. Extending the map down to 1% spool speed and to pressure ratios less than unity - as needed for starting and windmilling simulations - is not a problem.

Here are maps that have been extended down to 1% of the design spool speed:

Single Stage Fan - Design Pressure Ratio 1.7

Single Stage Fan - Design Pressure Ratio 2.47

3 Stage Fan - Design  Pressure Ratio 3.44

6-Stage HPC - Design Pressure Ratio 8

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