{
    "title": "N-Machine Test",
    "inventor_name": "Robert Kincheloe",
    "publication_year": 1986,
    "device_name": "Sunburst Homopolar Generator",
    "goal": "To experimentally evaluate the claim that the Sunburst homopolar generator can produce electrical output power without a corresponding increase in mechanical input power (i.e., \"free-energy\" generation).",
    "problem_addressed": "The alleged ability of a homopolar generator to extract latent spatial energy, producing output power that is not reflected as mechanical load on the drive source.",
    "concept_summary": "The Sunburst N-Machine is a homopolar generator consisting of a rotating electromagnet (3605-turn copper coil on a soft-iron core) with bronze end plates and graphite brushes for extracting current. The test aimed to measure input motor power and electrical output under load to see if the generator exhibits over-unity behavior.",
    "detailed_description": null,
    "category": "Electromagnetism & Magnetism",
    "principles": [
        "Electromagnetic induction (Faraday's law)",
        "Lorentz force on moving conductors",
        "Homopolar generator operation",
        "Torque interaction between rotating magnet and induced current (claimed to bypass Lenz's law)"
    ],
    "scientific_domains": [
        "Physics",
        "Electrical Engineering"
    ],
    "mechanisms_of_action": [
        "Rotating conductive disk (or cylinder) in an axial magnetic field induces a radial voltage",
        "Extracted current via sliding brushes creates torque that allegedly does not feed back to the drive source",
        "Magnetic field generated by the electromagnet and the field produced by output current interact"
    ],
    "materials": [
        "Copper wire (#10)",
        "Soft iron core",
        "Bronze cylindrical plates",
        "Graphite brushes",
        "Epoxy-impregnated fiberglass windings"
    ],
    "energy_sources": [
        "Mechanical rotation supplied by an external drive motor (DC or AC)",
        "DC power supplies for the electromagnet field"
    ],
    "inputs": [
        "Mechanical power to the drive motor",
        "DC voltage/current to energize the electromagnet"
    ],
    "outputs": [
        "Electrical output voltage (Vg)",
        "Electrical output current (Ig)",
        "Measured motor input power"
    ],
    "claimed_performance": "During testing, an increase in input power when output was extracted was reported as about 13 %-20 % of the maximum computed generated power; earlier unpublished data claimed output power 28.2 x the incremental input power.",
    "experimental_evidence": "Repeatable measurements were taken with calibrated digital meters, a variable-speed DC drive motor, and speed monitoring; data showed anomalous input-power increases when load was applied, but the magnitude depended on interpretation of the measurements.",
    "replication_status": "Tested by the author; no independent replication reported in the article.",
    "keywords": [
        "homopolar generator",
        "Faraday disc",
        "free energy",
        "overunity",
        "magnetic torque",
        "graphite brushes"
    ],
    "related_technologies": [
        "Faraday homopolar disc",
        "magnetic generators",
        "high-current brush systems",
        "magnetohydrodynamic pumps"
    ],
    "controversy_level": "high",
    "confidence_score": 0.7,
    "practicability_score": 0.3,
    "fringe_score": 0.85,
    "evidence_strength": 0.5,
    "risk_score": 0.2,
    "trl_estimate": 4,
    "source_urls": [],
    "organizations": [
        "Stanford University",
        "Sunburst Community"
    ],
    "applications": [
        "Experimental validation of free-energy concepts",
        "High-current power generation research"
    ],
    "limitations": [
        "Low generated voltage due to magnetic field concentration near axis",
        "High power (~=4 kW) required to energize magnet, limiting duty cycle",
        "Graphite brush voltage drop comparable to output voltage",
        "Large brush contact area causing significant friction losses"
    ],
    "open_questions": [
        "Does the observed input-power increase represent a genuine energy gain or a measurement artifact?",
        "What is the precise mechanism of the claimed torque that bypasses Lenz's law?",
        "Can the brush voltage drop and friction losses be reduced to improve efficiency?"
    ],
    "red_flags": [
        "Claims of free-energy and over-unity without independent verification",
        "Potential measurement uncertainties in AC power factor and current sensing",
        "Historical reliance on unpublished reports"
    ],
    "evidence_quotes": [
        "During 1985, I was invited to test such a machine. While it did not perform as claimed, repeatable data showed anomalous results that did not seem to conform to traditional theory.",
        "The increase in input power when power was extracted from the generator over that measured due to frictional losses with the generator unexcited seemed to be either about 13% or 20% of the maximum computed generated power, depending on interpretation.",
        "For a rotational speed of 6000 rpm an output power of 7560 W was claimed to require an increase of 268 W of drive power over that required to supply losses due to friction, windage, etc.",
        "The generator may be recognized as a so-called homopolar, or acyclic machine... the magnitude of the incremental radial generated voltage is proportional to both the strength of the magnetic field and the tangential velocity.",
        "Since this machine was not intended as a practical generator but as a means for testing the free energy principle, efficiency in producing external power was not required or relevant."
    ]
}