Koolhoven F.K.58
Enable an AI agent to identify the Koolhoven F.K.58 aircraft type, distinguish its configurations, and assess what evidence supports claims about its capabilities and service condition.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 15 findings · 25 questions
Type identity and variants Establish what belongs to the registered F.K.58 type and how its internal configurations are distinguished.
Recognition and boundary
Connect physical recognition to documentary identity.
Corroborated type identification
An identification should combine a traceable designation with visible configuration evidence, especially when distinguishing the F.K.58 from the Fokker D.XXI.
- Which marking, caption, drawing or manufacturing record explicitly identifies this aircraft as a Koolhoven F.K.58? provenance
- Which visible features support that identification, and which exclude a Fokker D.XXI or another contemporary fighter? boundary
Designation and build status
Separate named variants, actual installations and proposals within the single registry entry.
Variant evidence
Preserve source wording for F.K.58 and F.K.58A and map it to documented configurations rather than silently normalizing disputed labels.
- What designation does the contemporary source use, and which exact engine installation does it associate with that designation? definition
- Does the evidence establish a completed aircraft, a modification, an order or only a proposed configuration? provenance
Airframe and retractable undercarriage Capture the structural and geometric evidence needed to recognize the F.K.58 and interpret its physical condition.
Structural configuration
Associate component construction and dimensions with a documented F.K.58 configuration.
Construction and geometry record
Record wing, fuselage and covering construction from drawings or technical descriptions, distinguishing original construction from later reconstruction.
- Which drawings or technical descriptions establish the materials and structural arrangement of the wing and fuselage? provenance
- What span, length, height and wing area are documented, and to which prototype or production configuration do they apply? measurement
Undercarriage and control state
Represent the evidence needed to assess the retractable landing gear and flight controls.
Configuration-specific mechanisms
Require F.K.58-specific documentation for actuation, locking, indication and control arrangements; do not infer these mechanisms from contemporary aircraft.
- What source establishes the main-undercarriage actuation, locking and position-indication arrangements? provenance
- Which documented checks would be necessary before moving the landing gear or flight controls on an attributed airframe? action
Powerplant and performance Bind propulsion and flight-performance claims to the F.K.58 configuration that produced them.
Engine installation
Identify the installed engine and its airframe interfaces.
Installation-specific identity
Capture engine suffix, propeller and associated installation evidence without assuming interchangeability between Hispano-Suiza and Gnome-Rhône configurations.
- Which record establishes the exact engine suffix and propeller fitted to the configuration under discussion? provenance
- Which cowling, mounting or equipment differences are documented between those installations? boundary
Performance claim conditions
Separate tested results, design estimates and operational observations.
Comparable performance evidence
A performance value is usable only with its configuration, loading, altitude and evidential status.
- At what mass, altitude, engine rating and equipment fit was the reported speed or climb result obtained? measurement
- Was the value measured in a flight test, calculated, advertised or reported retrospectively? provenance
Equipment and serviceability Distinguish intended fighter equipment from documented fit and dated readiness.
Intended and installed equipment
Track configuration-level completeness of armament, instruments and communications.
Equipment fit evidence
Represent intended, installed, absent and unknown equipment separately, without treating a catalogue specification as proof of an individual fit.
- Which armament, sighting, radio and instrument equipment was specified for this F.K.58 configuration? definition
- Which dated inspection, inventory or photograph establishes what was actually installed? provenance
Support and condition
Connect serviceability judgments to installation-specific support and inspection evidence.
Documented readiness limits
Record reported defects, missing supplies and restrictions at the date observed; distinguish these from general aging risks or assumptions about the engine family.
- Which F.K.58 maintenance or service records document a defect, equipment shortage or operating restriction? provenance
- Which manuals, consumable specifications and inspection records are missing before a supported serviceability judgment can be made? action
Production, acceptance and service Trace the difference between procurement intentions and demonstrated aircraft use.
Manufacturing and delivery
Link production claims to identifiable aircraft and milestones.
Reconciled production account
Keep ordered, started, completed, delivered and accepted aircraft as separate quantities, with prototypes explicitly included or excluded.
- Which serial or construction-number records support the number of completed F.K.58 aircraft? provenance
- Does each published total count prototypes, incomplete airframes and subcontracted construction on the same basis? boundary
Acceptance and operational attribution
Establish who accepted or used the aircraft and what the records actually demonstrate.
Dated service claims
Attribute acceptance and operational claims to specific authorities, units and dates, distinguishing pilot affiliation from aircraft ownership.
- Which authority accepted the aircraft, under what documented requirements or restrictions? provenance
- Which unit record establishes actual F.K.58 use, and does it demonstrate assignment, readiness or a flown sortie? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of Koolhoven F.K.58 this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of Koolhoven F.K.58 this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of Koolhoven F.K.58 this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of Koolhoven F.K.58 this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Koolhoven F.K.58 this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
The Koolhoven F.K.58 was a Dutch-designed, single-seat, single-engine, low-wing fighter aircraft developed by Koolhoven in the late 1930s for French military service.
In scope
- Recognition of the F.K.58 design and its distinction from superficially similar contemporary fighters.
- Prototype, production and proposed configurations, with explicit evidence of which were actually built.
- Relationships between variant designation, engine installation, airframe configuration and reported performance.
- Type-specific requirements for interpreting equipment completeness, serviceability and historical acceptance.
- Evidence linking the aircraft type to manufacturing, delivery and operational use.
Out of scope
- Generic aerodynamic principles and the general category of fighter aircraft.
- Complete design and maintenance models of the engines, propellers and weapons fitted to the aircraft.
- Individual airframe ownership, location and maintenance histories except as evidence for type-level claims.
- Institutional histories of Koolhoven, purchasing authorities and operating units.
- Campaign histories, aerial combat tactics and weapon employment procedures.
- Scale models, fictional representations and replicas as instances of the original aircraft type.
Why it exists Filled
Enable an AI agent to identify the Koolhoven F.K.58 aircraft type, distinguish its configurations, and assess what evidence supports claims about its capabilities and service condition.
Distinguishing features Filled
- Require documentary identification connecting an aircraft to Koolhoven F.K.58; a radial-engine fighter silhouette alone is insufficient.
- Check the combination of a single-seat cockpit, single radial engine and monoplane layout against identified F.K.58 references. [Type overview](https://en.wikipedia.org/wiki/Koolhoven_F.K.58)
- Use retractable main undercarriage as a discriminator from the similar Fokker D.XXI, while corroborating identity with markings or construction records. [Historical comparison](https://earlyflightera.com/wp-content/uploads/2016/08/albumschatzki9p.pdf)
- Treat Hispano-Suiza and Gnome-Rhône installations as configuration evidence requiring a matching designation and date; do not classify an otherwise unidentified aircraft from engine family alone. [Configuration overview](https://en.wikipedia.org/wiki/Koolhoven_F.K.58)
What robots and AI may and may not do Filled
Must not
- Invent combat records or attribute victories without evidence.
- Present a related design as this type.
- Misrepresent the nationality of the people who flew it.
Only with a human decision
- Attributing artefacts or remains to this type.
May
- Identify photographs or records as this late-1930s fighter built for French service.
- Describe its brief service in 1940 from historical sources, noting gaps.
Moral aspects Filled
- Its story spans several nations and the people who flew it in a desperate campaign.
- Fabricated details distort a thinly documented history.
Who is affected
- Historians
- Descendants of pilots
Owners Filled
Steward
The museum or owner of any surviving example or remains; the state for items in public collections.
Links to other meta-models Filled
parent
- Q135214932 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.koolhoven-f-k-58
- Wikidata: Q1369689 (https://www.wikidata.org/wiki/Q1369689)
Direct properties required Filled
- Configuration identity: Source-recorded designation; prototype, production, proposed or unresolved
- Installed powerplant: Engine manufacturer, family, exact suffix and supporting installation record
- Reference geometry: Span, length and height in m; wing area in m²; configuration and measurement source required
- Mass and loading basis: kg, classified as empty, equipped, test-loaded or maximum permitted
- Engine power rating: kW with original hp or metric horsepower notation, altitude and rating duration retained
- Conditioned flight performance: Speed in km/h, altitude in m, climb time in min and range in km, each with test conditions
- Equipment completeness: Documented complete, documented incomplete, modified or unknown, by configuration and date
- Acceptance and use evidence: Dated manufacturer, purchasing authority, acceptance record and operating-unit record
- Serviceability evidence: Documented serviceable, restricted, unserviceable, incomplete or unknown at a stated date
Recognition required Filled
- Single-seat, low-wing monoplane with a radial engine.
- Few were built, so period photographs are the main evidence.
- French or Dutch markings of 1939-1940.
Capabilities and actions required Filled
- Classify a document, photograph or airframe claim as an F.K.58 candidate and identify the evidence still needed.
- Resolve a reported variant against engine, serial and date evidence while retaining conflicting designations.
- Compare performance claims only after aligning configuration, loading and test conditions.
- Determine whether records establish ordering, construction, delivery, acceptance or actual service use.
- Identify missing manuals, inspections or configuration records before supporting a restoration or serviceability assessment.
Hazards and failure modes required Filled
- Production delays and missing equipment limited its readiness.
- Combat at the time of the 1940 campaign was deadly for crews.
Standards and interfaces required Filled
- The Harmonized System nomenclature issued by the World Customs Organization places complete aeroplanes under heading 8802, providing a modern customs classification rather than a historical airworthiness approval.
Context of use required Filled
- This late 1930s fighter type is encountered in accounts of Dutch aircraft development and French military aviation before and during the early Second World War.
- Historical research uses production records, photographs and service documents to distinguish configurations and assess claims about performance and operational employment.
Sources Filled
- Wikidata item Q1369689: Koolhoven F.K.58 - identity and sense of the item
- Wikipedia: Koolhoven F.K.58 - general description of the item
Open questions
- Which contemporary documents conclusively map F.K.58 and F.K.58A designations to exact engine suffixes, given inconsistencies among later accounts?
- Which proposed alternative-engine configurations reached installation or flight, and which remained orders or design intentions?
- What configuration-specific dimensions, masses and measured performance can be recovered from original drawings and flight-test reports?
- Can construction, delivery and acceptance records reconcile production totals while separating prototypes and incomplete airframes?
- Which original maintenance manuals, acceptance requirements and service records survive, and what do they establish about equipment completeness, defects and actual operational use?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1369689/spec.json