{
  "benchmark_id": "aero-blind-validation-01",
  "facility": {
    "force_measurement": "Surface pressure integration and midspan wake survey; no published CFD comparison is provided to the predictor",
    "free_stream_turbulence": "Explicitly UNKNOWN at the time of these tests; do not substitute a measured value",
    "model_rotation_station_x_over_c": 0.25,
    "name": "NASA Langley Low-Turbulence Pressure Tunnel",
    "source_corrections": "Published data include standard low-speed wind-tunnel boundary corrections, reference 6 of NASA TM-4074. Choose corrected free-air comparison or another justified treatment before freezing; do not double-correct.",
    "test_section_height_m": 2.286,
    "test_section_width_m": 0.914
  },
  "flow_conditions": {
    "angle_of_attack_degrees": {
      "p01": -3.99,
      "p02": -1.98,
      "p03": -0.03,
      "p04": 0.04,
      "p05": 2.0,
      "p06": 4.06,
      "p07": 6.09,
      "p08": 8.09,
      "p09": 10.18,
      "p10": 11.13,
      "p11": 12.1,
      "p12": 13.31,
      "p13": 14.08,
      "p14": 15.24,
      "p15": 16.33,
      "p16": 17.13,
      "p17": 18.21,
      "p18": 19.27
    },
    "fluid": "air",
    "mach": 0.15,
    "reynolds_chord": 5950000,
    "source_static_pressure_density_viscosity": "Not separately tabulated for this series; any dimensional realization must preserve both Mach and chord Reynolds number and disclose assumptions",
    "source_temperature": "Tunnel stagnation temperature maintained near ambient; exact series temperature not supplied",
    "transition": {
      "exact_grit_height_m": "NOT SUPPLIED",
      "geometry": "localized strips, not wraparound",
      "grit": "No. 180",
      "location_x_over_c": 0.05,
      "strip_width_over_c": 0.01,
      "surfaces": [
        "upper",
        "lower"
      ],
      "type": "fixed"
    }
  },
  "geometry": {
    "chord_m": 0.601,
    "dimensional_model": "To be chosen before preregistration; experiment was a full-span nominally two-dimensional airfoil",
    "exact_measured_coordinates": "NOT SUPPLIED by this report's model description",
    "reported_ordinate_tolerance_over_chord": 0.0002,
    "section": "NACA 0012",
    "span_m": 0.9144,
    "trailing_edge_convention": "UNRESOLVED: choose and disclose a nominal geometry approximation before preregistration; no exact as-built equivalence claimed"
  },
  "permitted_uncertainty": {
    "coefficient_pointwise_uncertainties": "Not supplied as per-point confidence intervals; reference uncertainty entries remain unknown",
    "pressure_transducers": "Gauge calibration accuracy described in source methods; not directly a combined CL/CD confidence interval",
    "reported_model_geometry_tolerance": "0.0002 chord ordinate tolerance",
    "treatment_required": "Do not infer missing uncertainties from the hidden answers or use them to widen post-unseal acceptance tolerances"
  },
  "quantities": [
    "CL",
    "CD"
  ],
  "source_citation": "C. L. Ladson, NASA TM-4074 (1988), NTRS 19880019495. Table XIII, first subtable: M=0.15, R=5.95e6, transition fixed with No. 180 grit. Only the source-defined inputs and all operating-point locations are disclosed here.",
  "source_version": {
    "download_name": "19880019495.pdf",
    "methods_pdf_pages": [
      4,
      5
    ],
    "ntrs_id": "19880019495",
    "page_count": 97,
    "retrieved_utc_date": "2026-09-13",
    "series_pdf_page": 25,
    "series_printed_page": 23,
    "sha256": "8e466706cbdf54b3c778ea2b089c4f52d87686bf7f6b1bd10d224b42c2d06902"
  },
  "stations": [
    "p01",
    "p02",
    "p03",
    "p04",
    "p05",
    "p06",
    "p07",
    "p08",
    "p09",
    "p10",
    "p11",
    "p12",
    "p13",
    "p14",
    "p15",
    "p16",
    "p17",
    "p18"
  ]
}