{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T09:37:45Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 17.3, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094f9-7af4-74a1-983b-5e81744916b5\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: Fairchild AT-21 Gunner\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 04", "usd": 0.0, "recall": true }, "codex": { "seconds": 92.5, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094f9-7ae5-7fe3-b7c7-c9378dd15613\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Fairchild AT-21 Gunner\nRegistry id: vr.tr.fairchild-at-21-gunner\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:54:14+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:32+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q613549", "registryId": "vr.tr.fairchild-at-21-gunner", "name": "Fairchild AT-21 Gunner", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q613549/", "model": { "registry_id": "vr.tr.fairchild-at-21-gunner", "name": "Fairchild AT-21 Gunner", "purpose": "Enable an agent to identify the Fairchild AT-21 Gunner aircraft type, distinguish its documented configurations and assess what evidence is needed to interpret, preserve or evaluate an associated airframe.", "definition": "The Fairchild AT-21 Gunner was an American twin-engine military aircraft developed during the Second World War as a specialized crew trainer for bomber gunnery and operated by the United States Army Air Forces.", "scope_statement": "This model owns the type-specific identity, configuration, training function and assessment requirements of Fairchild AT-21 Gunner under vr.tr.fairchild-at-21-gunner in PHY / PHY.OBJ; individual aircraft records instantiate these requirements without becoming separate aircraft types.", "in_scope": [ "AT-21 designation, recognition evidence and boundaries with related experimental aircraft", "Production configuration and manufacturer-dependent provenance", "Twin-engine airframe, laminated plywood structure and installed systems", "Aerial-gunnery training equipment, crew stations and documented training roles", "Configuration-dependent performance, service limitations and preservation requirements" ], "out_of_scope": [ "Individual airframes' complete ownership, location and maintenance histories", "Fairchild, Bellanca and McDonnell as organisations", "General aircraft flight mechanics and pilot-training doctrine", "Duramold manufacture and material chemistry beyond aircraft-specific implications", "Standalone engine, firearm and turret models", "Related prototypes and derivative aircraft as independent types" ], "distinguishing_features": [ "Require evidence identifying the aircraft as AT-21 Gunner; manufacturer attribution alone is insufficient because Fairchild, Bellanca and McDonnell built examples. [Museum of Flight](https://archives.museumofflight.org/subjects/1315)", "Check the combination of twin engines and laminated plywood construction against type documentation; neither feature alone establishes identity. [Historic American Engineering Record](https://tile.loc.gov/storage-services/master/pnp/habshaer/nc/nc0300/nc0371/data/nc0371data.pdf)", "Look for evidence of the advanced aerial-gunner training role rather than identifying the type solely from a bomber-like appearance. [Historic American Engineering Record](https://tile.loc.gov/storage-services/master/pnp/habshaer/nc/nc0300/nc0371/data/nc0371data.pdf)", "Cross-check designation, powerplant installation and training-station arrangement when distinguishing an AT-21 from a related prototype, derivative or modified survivor." ], "characteristics": [ { "name": "Designation evidence", "kind": "relation", "unit_or_values": "Designation linked to identification plate, acceptance record, drawing or dated photograph", "why_it_matters": "Separates documented AT-21 identity from visual resemblance or an unsupported caption." }, { "name": "Production attribution", "kind": "relation", "unit_or_values": "Builder, factory, serial range and supporting production record", "why_it_matters": "Allows contract-built aircraft to remain members of the same type while preserving their provenance." }, { "name": "Configuration baseline", "kind": "category", "unit_or_values": "Documented production configuration; service modification; restoration configuration; unresolved", "why_it_matters": "Prevents features from different dates or aircraft being combined into an imaginary standard." }, { "name": "Structural material distribution", "kind": "category", "unit_or_values": "Material and construction method by fuselage, wing, empennage and control surface", "why_it_matters": "Makes laminated construction meaningful for identification and assessment without assuming every component uses it." }, { "name": "Installed propulsion", "kind": "relation", "unit_or_values": "Engine and propeller designations by position, with configuration applicability", "why_it_matters": "Supports prototype discrimination, restoration assessment and selection of applicable technical records." }, { "name": "Engine rating", "kind": "measurement", "unit_or_values": "kW or hp per engine, with rating duration, rpm and altitude", "why_it_matters": "Avoids treating incompatible engine ratings as directly comparable." }, { "name": "Airframe dimensions", "kind": "measurement", "unit_or_values": "Wingspan, length and height in m, with configuration and source", "why_it_matters": "Supports recognition, display planning and identification of inconsistent specifications." }, { "name": "Mass and balance envelope", "kind": "measurement", "unit_or_values": "kg and centre-of-gravity position relative to a stated datum", "why_it_matters": "Connects crew, fuel and training-equipment configurations to documented loading limits." }, { "name": "Training station configuration", "kind": "category", "unit_or_values": "Station roles, occupancy, installed training equipment and operational status", "why_it_matters": "Distinguishes intended training capability from equipment actually present." }, { "name": "Documented performance", "kind": "measurement", "unit_or_values": "Speed in km/h, climb in m/s, altitude and range in m or km, with test conditions", "why_it_matters": "Keeps performance claims tied to a specific loading and configuration." }, { "name": "Structural assessment state", "kind": "state", "unit_or_values": "Unassessed; inspected with recorded limitations; repair required; assessed for a specified use", "why_it_matters": "Prevents apparent completeness from being interpreted as structural fitness." } ], "affordances": [ "Classify an aircraft record or photograph as confirmed, probable or unresolved AT-21 identification.", "Compare a represented configuration with dated AT-21 drawings and equipment records.", "Map crew stations and installed equipment to documented training capabilities.", "Identify missing evidence before interpreting performance or historical serviceability.", "Prepare an aircraft-specific conservation or restoration research brief.", "Flag proposed handling or operation that lacks applicable structural, equipment or authorisation evidence." ], "agent_conduct": { "may": [ "Describe the aircraft's role in training bomber gunners during the Second World War.", "Support historians and museums in cataloguing records." ], "must_not": [ "Present uncertain production or service details as established fact.", "Confuse it with other types sharing a similar designation.", "Glorify violence when describing training for war." ], "requires_human": [ "Publishing interpretations where sources disagree." ] }, "ethics": { "considerations": [ "Training aircraft histories record the young crews prepared for dangerous missions." ], "affected_parties": [ "Veterans and their families", "Historians" ] }, "owners": { "steward": "Nobody owns the design history; archives and museums hold the surviving records.", "master_systems": [] }, "visual_identification": [ "A twin-engine aircraft with a twin tail and a compact fuselage.", "Gun positions for training gunners in the nose and fuselage." ], "failure_modes_and_hazards": [ "Records are scarce, so errors about the type can spread easily." ], "what_it_is_for": [ "The AT-21 was developed during the Second World War to train bomber crews in aerial gunnery.", "It is now principally encountered in aviation archives, historical photographs and research into military training aircraft." ], "standards_and_regulation": [ "The United States Army Air Forces classified the AT-21 in its advanced trainer aircraft designation series." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q613549: Fairchild AT-21 Gunner", "url": "https://www.wikidata.org/wiki/Q613549", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Fairchild AT-21 Gunner", "url": "https://en.wikipedia.org/wiki/Fairchild_AT-21_Gunner", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "designation-and-production", "name": "Designation and production", "description": "Establish AT-21 identity independently of captions, manufacturer names and related aircraft.", "rationale": "The registry represents one aircraft type whose examples can have different builders and modification histories.", "layers": [ { "id": "type-boundary", "name": "Type boundary", "description": "Define which configurations belong to the registered AT-21 concept.", "findings": [ { "id": "designation-membership", "name": "Designation membership", "description": "Require evidence connecting an aircraft or record to AT-21 and describe related designations as relationships rather than assumed synonyms.", "questions": [ { "text": "Which contemporary designation or acceptance documents establish AT-21 membership?", "kind": "definition", "id": "designation-membership-q01" }, { "text": "Which related experimental designations represent predecessors or derivatives rather than interchangeable AT-21 names?", "kind": "boundary", "id": "designation-membership-q02" } ] } ] }, { "id": "builder-and-baseline", "name": "Builder and baseline", "description": "Connect production attribution to the correct configuration evidence.", "findings": [ { "id": "production-configuration-applicability", "name": "Production configuration applicability", "description": "Track builder and serial applicability without automatically creating separate types for contract production.", "questions": [ { "text": "Which records connect Fairchild, Bellanca and McDonnell production to particular AT-21 serial ranges?", "kind": "provenance", "id": "production-configuration-applicability-q01" }, { "text": "Which documented equipment or construction differences require separate configuration baselines within AT-21?", "kind": "boundary", "id": "production-configuration-applicability-q02" } ] } ] } ] }, { "id": "airframe-and-propulsion", "name": "Airframe and propulsion", "description": "Describe the physical configuration needed to recognise and assess an AT-21.", "rationale": "Its laminated structure and twin-engine installation require more specific evidence than a generic powered-aircraft description.", "layers": [ { "id": "laminated-airframe", "name": "Laminated airframe", "description": "Locate materials, structural assemblies and diagnostic geometry.", "findings": [ { "id": "construction-and-geometry", "name": "Construction and geometry", "description": "Establish component-level construction and dimensions from applicable drawings rather than extending a general plywood description to every part.", "questions": [ { "text": "Which AT-21 assemblies use Duramold or other laminated construction, and which use different materials?", "kind": "definition", "id": "construction-and-geometry-q01" }, { "text": "What dimensions and wing, tail and landing-gear geometry are specified for the selected production baseline?", "kind": "measurement", "id": "construction-and-geometry-q02" } ] } ] }, { "id": "powerplant-installation", "name": "Powerplant installation", "description": "Identify engines, propellers and their aircraft-level interfaces.", "findings": [ { "id": "matched-propulsion-baseline", "name": "Matched propulsion baseline", "description": "Associate engine ratings, propellers, fuel requirements and controls with the same documented AT-21 configuration.", "questions": [ { "text": "Which engine and propeller designations are supported for production AT-21 aircraft, as distinct from related prototypes?", "kind": "provenance", "id": "matched-propulsion-baseline-q01" }, { "text": "What rated power, fuel grade, usable fuel capacity and lubricant requirements apply to that installation?", "kind": "measurement", "id": "matched-propulsion-baseline-q02" }, { "text": "Which cockpit controls and indicators govern each engine and propeller installation?", "kind": "definition", "id": "matched-propulsion-baseline-q03" } ] } ] } ] }, { "id": "gunner-training-arrangement", "name": "Gunner training arrangement", "description": "Connect crew accommodation and installed equipment to the AT-21's training purpose.", "rationale": "Training capability is central to Gunner identity and cannot be inferred from external shape or the presence of a weapon mount.", "layers": [ { "id": "crew-and-instruction", "name": "Crew and instruction", "description": "Determine who occupied each station and what instruction the aircraft supported.", "findings": [ { "id": "station-role-allocation", "name": "Station role allocation", "description": "Separate nominal seating capacity from pilot, instructor and trainee duties in documented training arrangements.", "questions": [ { "text": "How many occupants were provided for, and which stations belonged to pilots, instructors and gunner trainees?", "kind": "definition", "id": "station-role-allocation-q01" }, { "text": "Which AT-21 training tasks are demonstrated by contemporary manuals or unit records, including any bombardier instruction?", "kind": "provenance", "id": "station-role-allocation-q02" } ] } ] }, { "id": "training-equipment", "name": "Training equipment", "description": "Identify mounts, sights, communications and equipment states relevant to instruction.", "findings": [ { "id": "equipment-fit-and-safeguards", "name": "Equipment fit and safeguards", "description": "Distinguish installed, removed, simulated and inert equipment, recording safeguards only when supported by applicable documentation.", "questions": [ { "text": "Which gun positions, mounts, sights and instructor communications were fitted in each documented AT-21 configuration?", "kind": "definition", "id": "equipment-fit-and-safeguards-q01" }, { "text": "What evidence distinguishes operational training equipment from display substitutes or later additions?", "kind": "provenance", "id": "equipment-fit-and-safeguards-q02" }, { "text": "Which documented isolation procedures or interlocks constrain inspection and demonstration of retained equipment?", "kind": "action", "id": "equipment-fit-and-safeguards-q03" } ] } ] } ] }, { "id": "performance-and-service-suitability", "name": "Performance and service suitability", "description": "Relate published performance and historical training suitability to their actual evidence.", "rationale": "An AT-21 model must distinguish intended capability, measured results and explanations offered for its service outcome.", "layers": [ { "id": "loading-and-flight-envelope", "name": "Loading and flight envelope", "description": "Bind performance figures to loading, equipment and test conditions.", "findings": [ { "id": "conditional-performance", "name": "Conditional performance", "description": "Keep nominal specifications, measured performance and operating limitations distinct.", "questions": [ { "text": "What empty and loaded masses, centre-of-gravity limits and crew-equipment assumptions accompany AT-21 performance figures?", "kind": "measurement", "id": "conditional-performance-q01" }, { "text": "Which speed, climb, range and asymmetric-flight claims are supported by tests, and under what conditions?", "kind": "measurement", "id": "conditional-performance-q02" } ] } ] }, { "id": "training-service-evidence", "name": "Training service evidence", "description": "Assess reported shortcomings and changes in employment without assuming a single cause.", "findings": [ { "id": "service-outcome-attribution", "name": "Service outcome attribution", "description": "Separate documented technical deficiencies from changes in training policy, equipment availability or later historical interpretation.", "questions": [ { "text": "Which contemporary evaluations substantiate reported AT-21 handling, vibration or training-effectiveness problems?", "kind": "provenance", "id": "service-outcome-attribution-q01" }, { "text": "What records establish when and why training employment changed, and whether the explanation applies to all aircraft?", "kind": "boundary", "id": "service-outcome-attribution-q02" } ] } ] } ] }, { "id": "surviving-material-and-permitted-use", "name": "Surviving material and permitted use", "description": "Define AT-21-specific evidence needed to assess surviving assemblies, reconstructions and proposed uses.", "rationale": "Historical identity, original material and present fitness are separate judgments, particularly for a laminated wooden aircraft.", "layers": [ { "id": "structural-condition-and-repair", "name": "Structural condition and repair", "description": "Connect condition evidence and repair history to original AT-21 construction.", "findings": [ { "id": "bond-and-repair-evidence", "name": "Bond and repair evidence", "description": "Treat moisture damage, biological deterioration and bond separation as assessment subjects, without presuming their presence or an undocumented repair method.", "questions": [ { "text": "Which inspection methods and acceptance criteria are documented for the AT-21's laminated assemblies and bonded joints?", "kind": "provenance", "id": "bond-and-repair-evidence-q01" }, { "text": "What observations and repair records distinguish retained original structure from replacement or reconstructed material?", "kind": "measurement", "id": "bond-and-repair-evidence-q02" }, { "text": "Which AT-21 technical orders specify acceptable repair materials, processes and inspection intervals?", "kind": "action", "id": "bond-and-repair-evidence-q03" } ] } ] }, { "id": "authenticity-and-use-evidence", "name": "Authenticity and use evidence", "description": "Determine what an identified airframe or assembly can substantiate and what proposed use requires.", "findings": [ { "id": "use-specific-assessment", "name": "Use-specific assessment", "description": "Require separate evidence for historical attribution, static display, movement, equipment demonstration and flight.", "questions": [ { "text": "Which serial evidence, component records and restoration documents support an asserted AT-21 identity?", "kind": "provenance", "id": "use-specific-assessment-q01" }, { "text": "What structural, systems and equipment assessments are required for the particular proposed use?", "kind": "action", "id": "use-specific-assessment-q02" }, { "text": "Which issuing body and applicable document establish historical acceptance requirements or present authorisation for that use?", "kind": "provenance", "id": "use-specific-assessment-q03" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This describes the aircraft type, not a surviving airframe or its present airworthiness.", "Dimensions, performance, production totals, engine specifications and prototype relationships should be verified before inclusion.", "The hazards listed are general consequences of its configuration and training role, not verified AT-21 accident findings." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of Fairchild AT-21 Gunner this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "United States Army Air Forces aircraft designation", "value_or_pattern": "AT-21", "note": "AT denotes the Advanced Trainer category; the designation identifies an aircraft type, not an individual airframe." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of Fairchild AT-21 Gunner this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Training bomber crews in aerial gunnery.", "Providing a dedicated training aircraft in which crew members could practice duties associated with bomber operations." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of Fairchild AT-21 Gunner this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "An engine failure produces asymmetric thrust, requiring appropriate control inputs in this twin-engine aircraft.", "Live-fire gunnery training creates hazards from projectiles and requires controlled firing areas." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of Fairchild AT-21 Gunner this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "Fairchild PT-19", "difference": "The PT-19 was a single-engine primary pilot trainer; the AT-21 was a twin-engine aircraft intended for bomber crew and gunnery training." }, { "name": "Beechcraft AT-11 Kansan", "difference": "The AT-11 was a Beechcraft Model 18 derivative used for bombardier and gunnery training; the AT-21 was a separate Fairchild design." }, { "name": "Operational bomber", "difference": "The AT-21 was designed for training rather than operational bombing missions." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Fairchild AT-21 Gunner this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which original AT-21 specifications, flight manuals and technical orders establish production dimensions, powerplant variants, ratings and operating limitations?", "What exact crew complement, gun-station arrangement and training-equipment fit applied across builders and modifications?", "How should the boundaries with XAT-13, XAT-14, XAT-14A and XBQ-3 be documented without treating related designs as synonyms?", "Which contemporary records establish the causes and timing of reduced or discontinued AT-21 training employment?", "What authenticated AT-21 material survives, and what documented criteria govern assessment and repair of its laminated structure?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 15, "questions": 29 } }