# Sources and provenance

| Candidate group | Packaged data | Upstream source | Quality |
|---|---|---|---|
| V80-2.0 · Horns Rev 1 / PyWake | Tabular power and CT | PyWake `examples/data/hornsrev1.py` | Public reference |
| IEA37 3.35 MW | Benchmark equation and constant CT | IEA Wind Task 37 WFLO case studies | Public benchmark |
| IEA 10 MW · 198 m | Electrical power and CT | IEA-10.0-198-RWT `performance_ccblade.dat` | Public reference |
| IEA 15 MW · 240 m | Power and CT | IEA-15-240-RWT `Rotor Performance` table | Public reference |
| Vestas V150-4.5 / V163-4.5 | Public rating, rotor, operating speeds and listed hub heights; Velantis parametric P/CT | Official Vestas product pages | Spec-based approximation |
| Siemens Gamesa SG 5.0-145 / SG 7.0-170 | Public rating, rotor and listed tower heights; Velantis assumptions for missing operating points and parametric P/CT | Official Siemens Gamesa product pages | Spec-based approximation |
| GE Vernova 6.1-158 | Public rating range, rotor, cut-in/cut-out and listed hub heights; Velantis parametric P/CT | Official GE Vernova product page | Spec-based approximation |
| Nordex N163/5.X / N175/6.X / N133/4.8 | Public rating/range, rotor and operating speeds; selected screening rating where the OEM publishes a range; Velantis parametric P/CT | Official Nordex product pages | Spec-based approximation |
| Generic onshore/offshore classes | Parametric model generated by VelantisWind | No external OEM source | Approximate |

Full source identifiers, URLs and model-specific caveats are stored per candidate in `builtin_turbine_candidates.csv`.

A `spec_based_approximation` is **not** a published manufacturer power curve. It only anchors the approximation to public technical points. The values between those points, including CT, are generated by VelantisWind for preliminary screening.
