{
    "title": "Rotary Internal Combustion Engine",
    "inventor_name": "Gianni A. Dotto and Wallace Linn",
    "publication_year": 1974,
    "device_name": "Rotary Engine",
    "goal": "Achieve high specific power, continuous firing without a spark ignition system, reduced wear and cooler operating temperature.",
    "problem_addressed": "Conventional piston engines have lower specific power, require continuous spark ignition, generate high wear and operate at higher temperatures.",
    "concept_summary": "The invention uses an eccentric rotor mounted in an elliptical chamber that creates 16 variable-volume chambers separated by 16 mobile walls. A cam inside the rotor stabilizes the walls against the inner surface. Air-fuel (air-oil) mixture is supplied at low pressure by an axial blower, compressed, ignited during the decompression stroke, and expanded to drive the shaft. Continuous firing eliminates the need for a spark system, and the design claims higher power-to-weight and cooler operation.",
    "detailed_description": null,
    "category": "Mechanical Engineering",
    "principles": [
        "Eccentric rotor geometry",
        "Variable chamber volume",
        "Cam-stabilized mobile walls",
        "Continuous combustion (no spark)",
        "Ignition during decompression",
        "Air-oil mixture lubrication"
    ],
    "scientific_domains": [
        "Mechanical Engineering",
        "Thermodynamics",
        "Combustion Science"
    ],
    "mechanisms_of_action": [
        "Rotational motion of eccentric rotor varies chamber volume",
        "Air-fuel mixture is compressed and ignited at maximum pressure",
        "Combustion gases expand, pushing the rotor and producing shaft torque",
        "Cam mechanism keeps dividing walls in contact with cylinder wall to reduce wear"
    ],
    "materials": [
        "steel",
        "aluminum",
        "oil",
        "air"
    ],
    "energy_sources": [
        "fuel",
        "air"
    ],
    "inputs": [
        "air",
        "fuel",
        "oil"
    ],
    "outputs": [
        "mechanical power (shaft torque)",
        "exhaust gases"
    ],
    "claimed_performance": "400 HP from a 36 kg engine (~=11 HP/kg), 200 HP from a 20 cm diameter engine, continuous firing at 5 000 rpm and up to 18 000 rpm.",
    "experimental_evidence": null,
    "replication_status": null,
    "keywords": [
        "rotary engine",
        "continuous combustion",
        "eccentric rotor",
        "high specific power",
        "air-oil mixture"
    ],
    "related_technologies": [
        "Wankel engine",
        "vane rotary engine",
        "internal combustion engine"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.3,
    "risk_score": 0.2,
    "trl_estimate": 5,
    "source_urls": [
        "https://rexresearch.com/rotary_engine.html"
    ],
    "organizations": [
        "Gianni A. Dotto",
        "Wallace Linn"
    ],
    "applications": [
        "automobiles",
        "helicopters",
        "ships",
        "aircraft"
    ],
    "limitations": [
        "Requires precise cam and wall alignment",
        "No independent performance data",
        "Potential wear of mobile walls if lubrication fails"
    ],
    "open_questions": [
        "What is the actual thermal efficiency compared to conventional engines?",
        "How durable are the mobile dividing walls under long-term operation?",
        "What is the fuel consumption at rated power?"
    ],
    "red_flags": [
        "Claims are based solely on patent description without experimental validation",
        "High specific power figures lack supporting data"
    ],
    "evidence_quotes": [
        "400 Horsepower / 36 Kg, continuous firing (no ignition system), reduced wear, cooler temperature.",
        "specific power of min.11 HP / Kg, given about 2,5 HP / Kg as the medium amount of the classic combustion engine.",
        "The engine supply with air and oil is made by pping inside the stator.",
        "The moment choosen for ignition is unusual, compared to regular combustion engines, which make the ignition before the mixture reaches the maximum pressure.",
        "The inventors have specified that their Rotary Engine could develop 200 HP having just 20 centimeters in diameter."
    ]
}