{
  "title": "CIAM/NASA Mach 6.5 scramjet flight: approximate readings from Figure 6",
  "source": "R. T. Voland et al., AIAA-99-4848 (1999), NASA NTRS 20040087160, Figure 6, PDF page 4",
  "source_url": "https://ntrs.nasa.gov/citations/20040087160",
  "source_pdf_sha256": "8a9c844a03d20ee4b734e855cfe177f12c792f541b248293abb7096204837781",
  "status": "Approximate visual readings from a published plot; not raw telemetry, exact measurements, or a new flight simulation.",
  "method": "Mach and H/10 sampled from vector paths of a pixel-verified 4x PDF crop; q and fuel flow manually read from its 920x588 raster. Source CSV sample times are retained without interpolation. Left scale 0\u20137: Mach, H/10 (km), q (bar). Right scale 0\u20130.18 kg/s: total fuel flow. No raw time-series table or uncertainty bars are given.",
  "series": {
    "mach": {
      "label": "Mach number \u2014 approximate plot reading",
      "unit": "Mach",
      "color": "#75c8ff",
      "axis": "left",
      "values": [
        [
          0.0,
          0.002
        ],
        [
          5.0,
          1.412
        ],
        [
          10.0,
          1.901
        ],
        [
          15.0,
          2.009
        ],
        [
          20.0,
          2.236
        ],
        [
          25.0,
          2.531
        ],
        [
          30.0,
          2.807
        ],
        [
          35.0,
          3.206
        ],
        [
          40.0,
          3.745
        ],
        [
          45.0,
          4.376
        ],
        [
          50.0,
          5.159
        ],
        [
          55.0,
          6.126
        ],
        [
          56.5,
          6.391
        ],
        [
          60.0,
          6.278
        ],
        [
          65.0,
          6.087
        ],
        [
          70.0,
          5.939
        ],
        [
          75.0,
          5.859
        ],
        [
          80.0,
          5.784
        ],
        [
          85.0,
          5.709
        ],
        [
          90.0,
          5.669
        ],
        [
          95.0,
          5.631
        ],
        [
          100.0,
          5.6
        ],
        [
          105.0,
          5.569
        ],
        [
          110.0,
          5.544
        ],
        [
          115.0,
          5.521
        ]
      ]
    },
    "altitude": {
      "label": "Altitude H/10 \u00d7 10 \u2014 approximate plot reading",
      "unit": "km",
      "color": "#c2a2ff",
      "axis": "left",
      "values": [
        [
          0.0,
          0.008
        ],
        [
          5.0,
          1.532
        ],
        [
          10.0,
          3.471
        ],
        [
          15.0,
          5.623
        ],
        [
          20.0,
          8.028
        ],
        [
          25.0,
          10.595
        ],
        [
          30.0,
          12.927
        ],
        [
          35.0,
          14.846
        ],
        [
          40.0,
          16.496
        ],
        [
          45.0,
          18.049
        ],
        [
          50.0,
          19.491
        ],
        [
          55.0,
          21.054
        ],
        [
          56.5,
          21.51
        ],
        [
          60.0,
          22.603
        ],
        [
          65.0,
          23.958
        ],
        [
          70.0,
          25.123
        ],
        [
          75.0,
          26.015
        ],
        [
          80.0,
          26.646
        ],
        [
          85.0,
          27.25
        ],
        [
          90.0,
          27.339
        ],
        [
          95.0,
          27.337
        ],
        [
          100.0,
          26.964
        ],
        [
          105.0,
          26.591
        ],
        [
          110.0,
          26.005
        ],
        [
          115.0,
          25.388
        ]
      ]
    },
    "q": {
      "label": "Dynamic pressure q \u2014 approximate plot reading",
      "unit": "bar",
      "color": "#ffbf69",
      "axis": "left",
      "values": [
        [
          0.0,
          0.0
        ],
        [
          6.5,
          1.92
        ],
        [
          10.4,
          1.62
        ],
        [
          15.4,
          1.33
        ],
        [
          20.3,
          1.15
        ],
        [
          25.5,
          0.98
        ],
        [
          30.5,
          0.82
        ],
        [
          35.6,
          0.82
        ],
        [
          38.1,
          0.8
        ],
        [
          42.5,
          0.86
        ],
        [
          50.5,
          1.01
        ],
        [
          55.2,
          1.16
        ],
        [
          56.4,
          1.15
        ],
        [
          57.7,
          1.12
        ],
        [
          58.9,
          1.06
        ],
        [
          60.4,
          0.98
        ],
        [
          62.9,
          0.86
        ],
        [
          65.3,
          0.71
        ],
        [
          70.5,
          0.52
        ],
        [
          75.7,
          0.4
        ],
        [
          81.6,
          0.31
        ],
        [
          85.1,
          0.31
        ],
        [
          94.0,
          0.31
        ],
        [
          105.6,
          0.37
        ],
        [
          115.0,
          0.46
        ]
      ]
    },
    "fuel": {
      "label": "Total fuel flow \u2014 approximate plot reading",
      "unit": "kg/s",
      "color": "#ff8aa1",
      "axis": "right",
      "values": [
        [
          0.0,
          0.0
        ],
        [
          38.9,
          0.0
        ],
        [
          42.0,
          0.16
        ],
        [
          46.0,
          0.14
        ],
        [
          47.0,
          0.087
        ],
        [
          48.3,
          0.092
        ],
        [
          58.1,
          0.085
        ],
        [
          59.1,
          0.075
        ],
        [
          62.3,
          0.08
        ],
        [
          70.0,
          0.08
        ],
        [
          81.7,
          0.085
        ],
        [
          87.8,
          0.0
        ],
        [
          94.0,
          0.0
        ],
        [
          95.0,
          0.05
        ],
        [
          115.0,
          0.05
        ]
      ]
    }
  },
  "reported_events": [
    {
      "time_s": 38,
      "title": "Fuel injection begins (reported approximately)",
      "detail": "Text says near 38 s and Mach 3.5; raster rise reads around 39\u201342 s."
    },
    {
      "time_s": 50,
      "title": "Inlet restart after flow reduction",
      "detail": "Actual unstart follows initial over-fuelling. Reducing fuel allows restart, but control continues to sense unstart."
    },
    {
      "time_s": 53,
      "title": "Stage I commanded; no Stage I fuel",
      "detail": "The text says Stage I did not fuel while Stages II and III operated. Figure 6 only shows aggregate flow."
    },
    {
      "time_s": 56.5,
      "title": "Booster burnout and peak speed",
      "detail": "Text reports 1,830 m/s and Mach 6.4. It gives altitude as both 21.4 and 21.6 km; plot read-off is about 21.5 km."
    },
    {
      "time_s": 90,
      "title": "Reported apogee",
      "detail": "Text reports 27 km near 90 s; plot reads roughly 27.3\u201327.4 km across a broad 85\u201395 s plateau."
    },
    {
      "time_s": 115,
      "title": "Flight terminated",
      "detail": "Termination ends the test. The text reports about 77 s total fueled time, including a brief interruption."
    }
  ]
}