{
  "revision": "R1",
  "date": "2026-10-16",
  "status": "Proposed design targets; not measured or released for manufacture",
  "units": {
    "length": "mm",
    "mass": "g",
    "energy": "Wh",
    "power": "W"
  },
  "assumptions": {
    "airDensityKgM3": 1.225,
    "temperatureK": 288.15,
    "pressurePa": 101325,
    "heliumMolarMassKgMol": 0.004002602,
    "gasConstantJMolK": 8.314462618,
    "gravityMS2": 9.80665,
    "irradianceWM2": 1000,
    "assumedCellEfficiency": 0.22
  },
  "aera": {
    "code": "AER-01",
    "overallMm": [
      1800,
      900,
      1060
    ],
    "envelopeMm": [
      1650,
      900,
      900
    ],
    "podMm": [
      220,
      95,
      100
    ],
    "podDropMm": 160,
    "tailExtensionMm": 150,
    "thrusterCount": 2,
    "thrusterGuardDiameterMm": 55,
    "pvApertureMm": [
      700,
      160
    ],
    "battery": {
      "voltageV": 7.4,
      "capacityAh": 0.8,
      "enclosureMm": [
        65,
        35,
        20
      ]
    },
    "massBudgetG": {
      "Envelope and seams": 145,
      "Fins and attachments": 50,
      "Instrument housing": 35,
      "Propulsion and guards": 90,
      "Sensing and navigation": 75,
      "Battery": 65,
      "Solar laminate": 70,
      "Wiring and power conversion": 35,
      "Unallocated mass allowance": 35
    },
    "sensorAllocationMm": [
      80,
      45,
      35
    ],
    "cameraDownAngleDeg": 30,
    "materials": [
      "Barrier-film envelope with reinforced seams",
      "Lightweight removable fins",
      "Impact-resistant instrument shell",
      "Replaceable solar laminate"
    ],
    "ground": {
      "code": "CRD-01",
      "cradleMm": [
        1200,
        700,
        650
      ],
      "handlingSiteMm": [
        3000,
        3000
      ],
      "transportCaseMm": [
        700,
        450,
        250
      ],
      "transportState": "Envelope deflated; gas supply and storage excluded",
      "supportMode": "Attended ground handling; no automatic docking",
      "envelopeBottomHeightMm": 450,
      "humanReferenceHeightMm": 1750
    },
    "pending": [
      "Complete flight mass including lift gas and buoyancy trim; neutral balance and vertical-control authority",
      "Envelope film permeability, seam strength and solar heat loading",
      "Lift-gas choice and specialist handling review",
      "Measured mass, centre of gravity and buoyancy trim",
      "Wind, propulsion authority, recovery and lost-link behaviour",
      "Optical quality, location accuracy and data freshness",
      "Structural tolerances, assembly, gas hardware and material qualification"
    ],
    "massBudgetScope": "Base dry hardware before lift gas and buoyancy trim. Not the complete flight mass.",
    "buoyancyTrim": {
      "status": "Unqualified; the ideal static mass difference must be resolved by measured buoyancy trim and vertical-control testing. It is not a payload rating or usable flight reserve.",
      "massIncludedInBaseBudget": false
    }
  },
  "mira": {
    "code": "MDR-01",
    "overallMm": [
      380,
      380,
      120
    ],
    "bodyHeightMm": 80,
    "groundClearanceMm": 40,
    "rotorCount": 4,
    "rotorDiameterMm": 140,
    "ductOuterDiameterMm": 154,
    "rotorCentresMm": [
      [
        -105,
        -105
      ],
      [
        105,
        -105
      ],
      [
        -105,
        105
      ],
      [
        105,
        105
      ]
    ],
    "pvApertureMm": [
      240,
      55
    ],
    "gripRecessMm": [
      60,
      22,
      15
    ],
    "battery": {
      "voltageV": 14.8,
      "capacityAh": 3,
      "enclosureMm": [
        100,
        70,
        45
      ]
    },
    "massBudgetG": {
      "Frame and ducts": 220,
      "Motors, rotors and controllers": 180,
      "Battery": 260,
      "Flight and communications electronics": 50,
      "Sensing and navigation": 70,
      "Solar laminate": 30,
      "Feet and contact hardware": 35,
      "Wiring and power conversion": 25,
      "Unallocated mass allowance": 30
    },
    "sensorAllocationMm": [
      45,
      40,
      35
    ],
    "cameraDownAngleDeg": 35,
    "feetCentresMm": [
      [
        -110,
        -130
      ],
      [
        110,
        -130
      ],
      [
        0,
        145
      ]
    ],
    "materials": [
      "Replaceable impact-resistant duct modules",
      "Lightweight internal load-bearing frame",
      "Matte polymer shell with accessible fasteners",
      "Elastomer feet and isolated charging contacts"
    ],
    "powerScenario": {
      "assumedHoverElectricalW": [
        180,
        260
      ],
      "status": "Sizing scenario only; bench data and flight endurance are not established"
    },
    "point": {
      "code": "DCK-01",
      "deckMm": [
        600,
        600,
        160
      ],
      "contactSeatCentresMm": [
        [
          -110,
          -130
        ],
        [
          110,
          -130
        ],
        [
          0,
          145
        ]
      ],
      "panelMm": [
        1000,
        650,
        30
      ],
      "panelTiltDeg": 30,
      "panelLowerEdgeHeightMm": 400,
      "panelCentreMm": [
        2400,
        0
      ],
      "rackFootprintMm": [
        900,
        1000
      ],
      "cabinetMm": [
        500,
        300,
        500
      ],
      "storage": {
        "voltageV": 12.8,
        "capacityAh": 20
      },
      "chargingPowerTargetW": 60,
      "reservedApproachDiameterMm": 3000,
      "reservedApproachHeightMm": 3000,
      "siteBoundsMm": [
        -1500,
        -1500,
        3000,
        1500
      ],
      "serviceAccessWidthMm": 900,
      "massBudgetG": {
        "Landing deck": 5000,
        "Panel": 5000,
        "Rack": 6000,
        "Enclosure and electronics": 4000,
        "Station battery": 3000
      },
      "status": "Proposed site allocation; not a certified clearance or unattended charging specification"
    },
    "pending": [
      "Rotor and duct thrust, efficiency, vibration, acoustics and contact risk",
      "Measured mass, centre of gravity and thermal performance",
      "Battery chemistry, BMS, connector and charging interlocks",
      "Landing target visibility, alignment and foot-contact repeatability",
      "Rain, dust, drainage, lightning and station anchoring",
      "Occupied point, lost link, low reserve and operator recovery",
      "Weather limits, operational approval and NODERIQ integration acceptance"
    ]
  },
  "drawingContract": {
    "sheetMm": [
      420,
      297
    ],
    "viewBox": [
      0,
      0,
      1680,
      1188
    ],
    "scaleDenominators": {
      "aera": 10,
      "aera-ground": 15,
      "mira": 2,
      "mira-point": 15
    },
    "meaning": "Orthographic allocations drawn from numeric coordinates. Print A3 at 100 percent. Responsive previews are not actual size.",
    "excluded": "Manufacturing tolerances, full structures, electrical schematics, flight-control design and certification"
  },
  "sources": [
    {
      "label": "NASA scientific balloon buoyancy",
      "url": "https://www.nasa.gov/scientificballoons/faqs/",
      "supports": "Displaced air minus complete system mass; environmental dependence."
    },
    {
      "label": "NASA air properties",
      "url": "https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/air-properties-definitions/",
      "supports": "Standard-condition context; 1.225 kg/m3 is an explicit sizing assumption, not a measured site value."
    },
    {
      "label": "NIST helium molar mass",
      "url": "https://webbook.nist.gov/cgi/cbook.cgi?ID=C7440597&Units=SI",
      "supports": "Helium molar mass for the ideal-gas sizing calculation; helium is not a selected product gas."
    },
    {
      "label": "NASA rotorcraft hover theory",
      "url": "https://rotorcraft.arc.nasa.gov/Publications/files/NASA-TM-2020-220485-final.pdf",
      "supports": "Ideal induced power is a lower bound; real rotor and duct losses require testing."
    },
    {
      "label": "US DOE photovoltaic efficiency",
      "url": "https://www.energy.gov/cmei/systems/solar-photovoltaic-performance-and-efficiency-basics",
      "supports": "Area, irradiance and efficiency context. 22 percent efficiency is an assumption, not a measured module rating."
    },
    {
      "label": "PX4 precision landing",
      "url": "https://docs.px4.io/main/en/advanced_features/precland",
      "supports": "Landing target visibility, guidance and fallback context only; no selected autopilot or integration."
    }
  ],
  "limits": [
    "No accepted endurance, wind rating, altitude, accuracy, ingress rating, noise rating or autonomous docking claim.",
    "Engineering allocations are not selected or tested components.",
    "Photoreal views follow the R1 proportions, but dimensional authority belongs to the numeric record and orthographic drawings.",
    "Airborne solar power is assistance; no claim of solar-sustained rotor flight.",
    "Site layouts are generic planning environments, not customer installations."
  ],
  "sourceSha256": "b1f4b2079ae6470046365aa9a5c8f2fd4f4edb1b9e0b78796c3e88cf470d32b9",
  "calculations": {
    "aera": {
      "envelopeVolumeM3": 0.6997897635871264,
      "heliumDensityKgM3": 0.16928021871762225,
      "heliumMassG": 118.46056423638193,
      "displacedAirMassG": 857.24246039423,
      "idealNetLiftG": 738.781896157848,
      "baseDryHardwareMassTargetG": 600,
      "idealStaticMassDifferenceG": 138.781896157848,
      "batteryNominalWh": 5.920000000000001,
      "idealSolarApertureW": 24.64
    },
    "mira": {
      "massTargetG": 900,
      "totalRotorAreaM2": 0.06157521601035995,
      "idealHoverPowerLowerBoundW": 67.50854740962109,
      "batteryNominalWh": 44.400000000000006,
      "idealSolarApertureW": 2.904,
      "deckEdgeAllowanceMm": 110
    },
    "point": {
      "massTargetG": 23000,
      "batteryNominalWh": 256,
      "idealSolarApertureW": 143,
      "panelUpperEdgeHeightMm": 900,
      "rackToReservedApproachGapMm": 450
    }
  },
  "formulas": {
    "volume": "pi/6 × envelope length × width × height",
    "heliumDensity": "p × molar mass / (R × T), ideal gas, equal inside/outside pressure and temperature",
    "netLift": "volume × (assumed air density − ideal helium density)",
    "pv": "aperture area × assumed irradiance × assumed efficiency; excludes temperature, angle, shading, curvature and conversion losses",
    "hover": "T^(3/2) / sqrt(2 × rho × total rotor area); ideal lower bound, not electrical power",
    "nominalBattery": "nominal voltage × capacity; excludes reserve, ageing and conversion losses"
  }
}