Dear Dee,
The 1.5-MW turbine model we supply in the FAST CertTest is a model of the WindPACT 1.5-MW baseline, as documented in this report: nrel.gov/docs/fy06osti/32495.pdf. The report states that the rotor for this turbine was designed for a maximum power coefficient (Cpmax) of 0.50 at an optimal tip-speed ratio (TSR) of 7.0 and an optimal blade-pitch angle (thetap) of 2.6 degrees. I’ve not ran this model myself much, it’s been a very long time since of I have, and I don’t recall if the model produces these values exactly. (They should be close.) If you need more data than this (like the complete Cp versus TSR/thetap curve), you can run your own simulations to derive the data you seek.
Best regards,