{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.lawrance-j-1","code":"thing-q6503734","url":"https://ver.cy/models/thing/q6503734/","name":"Lawrance J-1","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.FLW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A nine-cylinder air-cooled radial aircraft engine developed by Charles Lawrance and the Lawrance Aero Engine Company in the early 1920s for the United States Navy, producing about two hundred horsepower, which demonstrated the practicality of air-cooled radials for naval aircraft and led, after Wright Aeronautical acquired the company, to the Wright J-series Whirlwind engines; the J-1 is a historically important step in aircraft engine development.","purpose":"Let an agent explain the Lawrance J-1 as a historical aircraft engine, describe its design, development and significance from published sources, and support aviation history questions.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Air-cooled radial","Naval sponsorship","Whirlwind ancestor","Early 1920s"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What the J-1 is.","layers":[{"id":"design","name":"Design","description":"Design and specifications.","findings":[{"id":"design-finding","name":"Design","description":"Design.","questions":[{"text":"What are the design and published specifications of the Lawrance J-1?","kind":"definition"},{"text":"Which entry fits radial engines generally?","kind":"action"}]}]},{"id":"development","name":"Development","description":"Development.","findings":[{"id":"development-finding","name":"Development","description":"Development.","questions":[{"text":"How did Charles Lawrance and the Navy develop the J-1, and why did air cooling matter for naval aviation?","kind":"provenance"},{"text":"Which findings are contested?","kind":"boundary"}]}]}]},{"id":"significance","name":"Significance","description":"Significance.","layers":[{"id":"legacy","name":"Legacy","description":"Legacy in the Whirlwind.","findings":[{"id":"legacy-finding","name":"Legacy","description":"Legacy.","questions":[{"text":"How did the acquisition of Lawrance by Wright lead to the Whirlwind series?","kind":"provenance"},{"text":"Which entry fits the Whirlwind family?","kind":"action"}]}]},{"id":"applications","name":"Applications","description":"Applications.","findings":[{"id":"applications-finding","name":"Applications","description":"Applications.","questions":[{"text":"Which aircraft tested or used the J-1, according to published sources?","kind":"provenance"},{"text":"Which entry fits a specific aircraft?","kind":"action"}]}]}]},{"id":"preserve","name":"Preserve","description":"Preservation.","layers":[{"id":"museums","name":"Museums","description":"Museum examples.","findings":[{"id":"museums-finding","name":"Museums","description":"Museums.","questions":[{"text":"Are J-1 engines preserved, and where?","kind":"provenance"},{"text":"Which entry fits aviation museums?","kind":"action"}]}]},{"id":"sources","name":"Sources","description":"Sources.","findings":[{"id":"sources-finding","name":"Sources","description":"Sources.","questions":[{"text":"Which archival and published sources document the J-1?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"learn","name":"Learn","description":"Context and teaching.","layers":[{"id":"context","name":"Context","description":"Historical context.","findings":[{"id":"context-finding","name":"Context","description":"Context.","questions":[{"text":"How did the J-1 fit into the debate between liquid-cooled and air-cooled engines in the 1920s?","kind":"provenance"},{"text":"Which entry fits aircraft engine history?","kind":"action"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can early radial engines be taught in aviation history?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain the Lawrance J-1's design and significance from published sources.","Note where historical data is sparse or inconsistent.","Distinguish it from later Wright Whirlwinds."],"mustNot":["Overstate its performance.","Confuse it with later Whirlwinds.","Fill historical gaps with invented figures.","Present historic data as approval to run a surviving engine."],"requiresHuman":["Running or restoring a surviving engine."]},"ethics":{"considerations":["Historic engines are rare artefacts; accuracy protects the record.","Running old engines poses risks to people nearby."],"affectedParties":["Museums","Historians","Restorers"]},"owners":{"steward":"The owner of each surviving engine; museums keep most examples.","roles":[],"masterSystems":[]},"relations":[{"target":"Q1461777","type":"parent","note":"registry parent class"},{"target":"Whirlwind","type":"related","note":"category"},{"target":"R-790 Whirlwind","type":"related","note":"the successor engine"},{"target":"R-760 Whirlwind","type":"related","note":"a later family member"},{"target":"navy","type":"related","note":"the sponsor of its development"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.lawrance-j-1","Wikidata: Q6503734 (https://www.wikidata.org/wiki/Q6503734)"]},"properties":{"applicability":"required","items":["Shaft power: Approximately 200 horsepower - This approximate historical rating describes mechanical output under rated operating conditions rather than the capability of a preserved specimen.","Dry mass:  kilograms - Determine mass by weighing the engine without operating fluids and recording which accessories are fitted.","Overall diameter:  millimetres - Measure the maximum external span perpendicular to the crankshaft axis and record whether protruding accessories are included."]},"recognition":{"applicability":"required","items":["Lawrance nine-cylinder air-cooled radial","Predecessor of the Wright Whirlwind","The Wright J-5 and R-790 are the successors","A nine-cylinder radial engine of the early 1920s."]},"capabilities":{"applicability":"required","items":["explain design and development","describe significance","identify applications","support history questions"]},"hazards":{"applicability":"required","items":["Confusing with later Whirlwinds","Sparse and inconsistent historical data","Overstating performance"]},"interfaces":{"applicability":"required","items":["Historical naval procurement records","Museum conservation standards","No current regulation"]},"context":{"applicability":"required","items":["Early nine-cylinder radial aircraft engine.","the J-1 itself","related Lawrance engines","successor Wright J-series engines","test and prototype installations","preserved examples"]}},"sources":[{"title":"Wikidata item Q6503734: Lawrance J-1","url":"https://www.wikidata.org/wiki/Q6503734","note":"identity and sense of the item"},{"title":"Wikipedia: Lawrance J-1","url":"https://en.wikipedia.org/wiki/Lawrance_J-1","note":"general description of the item"}],"openQuestions":["Should Lawrance engines be a family entry?","How should archival sources be linked?","How should museum holdings be linked?"],"resources":{"spec":"/models/things/publications/thing-q6503734/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q6503734/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T06:07:39Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:32+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}