{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.halberstadt-cl-iv","code":"thing-q466925","url":"https://ver.cy/models/thing/q466925/","name":"Halberstadt CL.IV","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The Halberstadt CL.IV is a German two-seat, single-engine military biplane developed by Halberstadt during the First World War as a successor to the CL.II and used chiefly for close-support and ground-attack missions in 1918.","purpose":"Enable an agent to identify the Halberstadt CL.IV aircraft type, assess evidence about its configurations and surviving examples, and determine which conservation or operational decisions that evidence supports.","scope":{"in":["CL.IV designation, design lineage and manufacturer attribution","Airframe, propulsion, crew stations and installed equipment configurations","Configuration-dependent dimensions, loading and performance","Historical mission suitability and exposure to damage","Type-specific authenticity, condition and intervention requirements"],"out":["Individual airframes' complete ownership and maintenance records","The Halberstadt CL.II as an independently modelled aircraft type","The Mercedes D.III engine and installed weapons as independent product types","Halberstädter Flugzeugwerke and military units as organisations","World War I campaigns and individual sorties as events","General aircraft certification law and museum collection management"],"boundaries":[]},"distinguishingFeatures":["Require evidence for the combined manufacturer and designation Halberstadt CL.IV; the designation CL.IV alone does not establish identity.","Check the two-seat biplane configuration against CL.IV-specific drawings or authenticated examples; silhouette alone cannot distinguish neighbouring German aircraft types.","Distinguish the CL.IV from its predecessor, the Halberstadt CL.II, through documented type attribution and structural comparison rather than shared engine or mission. [Smithsonian collection record](https://airandspace.si.edu/collection-objects/halberstadt-cliv/nasm_A19840660000)","Use the documented combination of fixed forward armament and a flexible rear gun as corroboration, while recognising that museum examples may lack equipment. [USAF museum fact sheet](https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195989/halberstadt-cl-iv/)","Separate an original CL.IV, a restored composite and a replica through component provenance; painted serials and unit markings are insufficient evidence."],"structure":{"bundles":[{"id":"designation-and-lineage","name":"Designation and lineage","description":"Establish what qualifies as the registered CL.IV type and how adjacent designs relate to it.","layers":[{"id":"type-identification","name":"Type identification","description":"Connect documentary identification to physical evidence.","findings":[{"id":"combined-identity-evidence","name":"Combined identity evidence","description":"Record manufacturer, designation and identifying documents together; retain disagreement between labels and physical evidence.","questions":[{"text":"Which contemporary record or authenticated component identifies this aircraft as a Halberstadt CL.IV?","id":"combined-identity-evidence-q01","kind":"provenance"},{"text":"What evidence would exclude a CL.II, another manufacturer's CL.IV or a replica?","id":"combined-identity-evidence-q02","kind":"boundary"}]}]},{"id":"predecessor-and-production","name":"Predecessor and production","description":"Separate design lineage from manufacturing attribution.","findings":[{"id":"lineage-without-equivalence","name":"Lineage without equivalence","description":"The CL.IV was designed as a replacement for the CL.II; the Smithsonian also records orders from Halberstadt and subcontractor L.F.G. Neither relationship alone settles an example's detailed configuration. [Smithsonian collection record](https://airandspace.si.edu/collection-objects/halberstadt-cliv/nasm_A19840660000)","questions":[{"text":"Which documented design changes distinguish the CL.IV from the CL.II?","id":"lineage-without-equivalence-q01","kind":"definition"},{"text":"Which builder or batch differences require configuration distinctions within this registry entry?","id":"lineage-without-equivalence-q02","kind":"boundary"}]}]}]},{"id":"airframe-and-crew-layout","name":"Airframe and crew layout","description":"Capture the geometry and crew arrangement needed to recognise and assess a CL.IV.","layers":[{"id":"geometry-and-construction","name":"Geometry and construction","description":"Evaluate the airframe against configuration-specific dimensional and construction evidence.","findings":[{"id":"airframe-reference-match","name":"Airframe reference match","description":"Compare wings, fuselage, empennage and undercarriage with authenticated CL.IV references, recording replacement structures and measurement conditions.","questions":[{"text":"Which drawings or measured originals establish the applicable wing, fuselage and tail geometry?","id":"airframe-reference-match-q01","kind":"provenance"},{"text":"Do measured span, length and height agree with that configuration within documented uncertainty?","id":"airframe-reference-match-q02","kind":"measurement"}]}]},{"id":"crew-stations-and-controls","name":"Crew stations and controls","description":"Relate the two crew positions to controls, visibility and installed equipment.","findings":[{"id":"station-layout-evidence","name":"Station layout evidence","description":"Record the pilot and rear crew station arrangements from applicable evidence, including control paths and equipment clearances rather than assuming a standard cockpit fit.","questions":[{"text":"Which controls, instruments and mounts are documented for each crew station in this configuration?","id":"station-layout-evidence-q01","kind":"definition"},{"text":"What evidence is required before reconstructing missing controls or rear-station equipment?","id":"station-layout-evidence-q02","kind":"action"}]}]}]},{"id":"propulsion-loading-and-performance","name":"Propulsion, loading and performance","description":"Connect the installed powerplant and aircraft loading to defensible capability claims.","layers":[{"id":"powerplant-installation","name":"Powerplant installation","description":"Identify the engine and its supporting installation.","findings":[{"id":"documented-engine-baseline","name":"Documented engine baseline","description":"The USAF museum identifies a 160 hp Mercedes D.III water-cooled inline six-cylinder engine; record the actual engine, propeller and supporting systems before applying this baseline to an example. [USAF museum fact sheet](https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195989/halberstadt-cl-iv/)","questions":[{"text":"Which engine subtype and propeller are supported by this aircraft's configuration evidence?","id":"documented-engine-baseline-q01","kind":"provenance"},{"text":"Which records establish the required fuel, lubrication, cooling and inspection provisions for that installation?","id":"documented-engine-baseline-q02","kind":"action"}]}]},{"id":"conditional-capability","name":"Conditional capability","description":"Keep measured performance separate from context-free catalogue figures.","findings":[{"id":"performance-with-conditions","name":"Performance with conditions","description":"Attach speed, range, ceiling and mass claims to their source, loading assumptions and configuration; unresolved discrepancies remain explicit.","questions":[{"text":"What crew, fuel, stores, engine rating and atmospheric conditions accompany each performance figure?","id":"performance-with-conditions-q01","kind":"measurement"},{"text":"Which figures describe a tested CL.IV configuration, and which are secondary estimates?","id":"performance-with-conditions-q02","kind":"provenance"}]}]}]},{"id":"mission-equipment-and-vulnerability","name":"Mission equipment and vulnerability","description":"Explain the relationship between CL.IV equipment, documented roles and exposure to damage.","layers":[{"id":"weapons-and-stores-fit","name":"Weapons and stores fit","description":"Distinguish documented alternatives from the equipment present on a particular example.","findings":[{"id":"variable-armament-record","name":"Variable armament record","description":"The USAF museum lists one or two fixed 7.92 mm Spandau guns, a flexible 7.92 mm Parabellum and small bombs or grenades. Treat these as sourced configuration possibilities, not proof of every aircraft's fit. [USAF museum fact sheet](https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195989/halberstadt-cl-iv/)","questions":[{"text":"Which weapons and store provisions are supported for the builder, date and aircraft being represented?","id":"variable-armament-record-q01","kind":"provenance"},{"text":"Are missing mounts evidence of a different configuration, later alteration or incomplete preservation?","id":"variable-armament-record-q02","kind":"boundary"}]}]},{"id":"roles-and-protection","name":"Roles and protection","description":"Relate recorded employment to capability and limitations.","findings":[{"id":"role-does-not-imply-protection","name":"Role does not imply protection","description":"The USAF museum documents ground attack and night operations while noting inadequate armour against ground fire; role labels must therefore remain separate from protection claims. [USAF museum fact sheet](https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195989/halberstadt-cl-iv/)","questions":[{"text":"Which service evidence establishes each claimed role and any associated equipment changes?","id":"role-does-not-imply-protection-q01","kind":"provenance"},{"text":"What protection was actually installed, and which damage vulnerabilities are documented rather than inferred?","id":"role-does-not-imply-protection-q02","kind":"definition"}]}]}]},{"id":"surviving-aircraft-and-intervention","name":"Surviving aircraft and intervention","description":"Translate evidence about surviving CL.IV material into defensible interpretation and intervention decisions.","layers":[{"id":"authenticity-and-representation","name":"Authenticity and representation","description":"Distinguish component history from the historical aircraft a display represents.","findings":[{"id":"component-level-authenticity","name":"Component-level authenticity","description":"Assess fuselage, wings, engine, equipment and finish separately; do not use a display's paint scheme to establish the provenance of its underlying components.","questions":[{"text":"Which components retain traceable original material, and which were transferred, reconstructed or reproduced?","id":"component-level-authenticity-q01","kind":"provenance"},{"text":"Do displayed serials and unit markings identify the surviving airframe or a chosen historical representation?","id":"component-level-authenticity-q02","kind":"boundary"}]}]},{"id":"condition-and-authorised-use","name":"Condition and authorised use","description":"Connect proposed handling or operation to evidence for the actual surviving structure.","findings":[{"id":"intervention-evidence-threshold","name":"Intervention evidence threshold","description":"Require condition evidence for the CL.IV's actual structural materials, rigging, joints, controls and installed systems before assigning handling or operational readiness.","questions":[{"text":"Which inspections establish the condition of load-bearing structure, bracing and control continuity on this example?","id":"intervention-evidence-threshold-q01","kind":"measurement"},{"text":"What specialist assessment and applicable authority are needed for the proposed move, engine run or flight?","id":"intervention-evidence-threshold-q02","kind":"action"}]}]}]},{"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.","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.","questions":[{"text":"Which of these check these first hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-identifiers-q01","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.","questions":[{"text":"Which of these real-world use hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-measurements-q01","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.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","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.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of Halberstadt CL.IV this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe the aircraft's design and its First World War close-support role.","Support museums in conserving and cataloguing surviving examples."],"mustNot":["Damage, alter or remove parts from a preserved airframe without the custodian's approval.","Glorify attacks on soldiers or civilians when describing its service.","Present uncertain service details as established fact."],"requiresHuman":["Any conservation intervention on a preserved airframe."]},"ethics":{"considerations":["War aircraft histories touch on loss of life on all sides and should be told with care."],"affectedParties":["Descendants of those who fought","Museums and visitors","Historians"]},"owners":{"steward":"The museum that holds a surviving example; nobody owns the design history.","roles":[],"masterSystems":[]},"relations":[{"target":"Q113163578","type":"parent","note":"registry parent class"},{"target":"Q11436","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.halberstadt-cl-iv","Wikidata: Q466925 (https://www.wikidata.org/wiki/Q466925)"]},"properties":{"applicability":"required","items":["Type attribution: Evidence linking an aircraft or record to vr.tr.halberstadt-cl-iv","Builder and production configuration: Documented builder, production batch and modification state; unknown permitted","Crew arrangement: Two-seat arrangement; record station layout and equipment","Installed propulsion: Engine designation, propeller specification and installation evidence","Airframe dimensions: Wingspan, length and height in m, with source and configuration","Mass and loading: kg; distinguish empty, equipped and loaded conditions","Performance evidence: Speed in km/h, range in km and altitude in m, with test conditions","Armament configuration: Documented fixed guns, flexible gun and carried stores; absent or unknown permitted","Material authenticity: Original, repaired, replacement, reproduction or unresolved, assessed by component","Assessed readiness: Unassessed, display-only, handling-assessed, ground-operation-assessed or flight-authorised, with dated evidence"]},"recognition":{"applicability":"required","items":["A compact two-seat biplane with a short-span upper wing and the gunner's cockpit close behind the pilot.","A single nose-mounted inline engine and a tailplane set high on the rear fuselage."]},"capabilities":{"applicability":"required","items":["Assess a proposed CL.IV identification against documentary and physical evidence.","Compare an example with a documented production or service configuration.","Reconcile published dimensions and performance figures by configuration and measurement conditions.","Explain historical mission suitability using crew, equipment and protection evidence.","Identify evidence and specialist assessments needed before handling, restoration or operation.","Record unresolved identification or restoration questions without converting assumptions into type facts."]},"hazards":{"applicability":"required","items":["Aged wood, fabric and dope are fragile and can be damaged by handling or poor climate control."]},"interfaces":{"applicability":"required","items":["The historical CL aircraft classification, issued by the German Inspectorate of Flying Troops, designated lightweight armed two-seat aircraft and applies to this type."]},"context":{"applicability":"required","items":["This aircraft type is encountered in accounts of close support and ground attack during the final year of the First World War.","Surviving aircraft, components, photographs and drawings support historical identification, museum interpretation and conservation research."]}},"sources":[{"title":"Wikidata item Q466925: Halberstadt CL.IV","url":"https://www.wikidata.org/wiki/Q466925","note":"identity and sense of the item"},{"title":"Wikipedia: Halberstadt CL.IV","url":"https://en.wikipedia.org/wiki/Halberstadt_CL.IV","note":"general description of the item"}],"openQuestions":["Which contemporary drawings establish reliable physical discriminators between the CL.IV and CL.II, including any builder-dependent differences?","How did Halberstadt-built and L.F.G.-built aircraft differ, and which distinctions belong within the type's configuration model?","Which original acceptance or test records resolve engine subtype, power rating, dimensions, mass and performance discrepancies?","What evidence establishes weapons, stores and protection configurations across production batches and service modifications?","Which surviving examples preserve independently attributable original components, and what restoration records document their present configurations?"],"resources":{"spec":"/models/things/publications/thing-q466925/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q466925/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T10:10:26Z","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 2026-10-07T10:10:31+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}