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De Havilland DH.18

1920 biplane airliner by de Havilland

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 10, 2026
Entity authorityQ408448 ↗
Source-derived summary

The de Havilland DH.18 was a single-engined British biplane transport aircraft of the 1920s built by de Havilland.

Design and development

The DH.18 was designed and built in 1919 by Airco as their first aircraft specifically for commercial work, earlier aircraft such as the DH.16 being modified military types. The DH.18 was a single-engined biplane, powered by a Napier Lion engine with wooden two-bay, wire-braced wings, and a forward fuselage clad in plywood. It accommodated eight passengers in an enclosed cabin with the pilot in an open cockpit behind the cabin. The first prototype flew early in 1920.

Operational history

The first DH.18 was delivered to Aircraft Transport and Travel for use on the Croydon-Paris service, but was wrecked in a forced landing shortly after takeoff from Croydon on 16 August 1920. Two more aircraft were under construction by Airco for Aircraft Transport and Travel when the bankrupt Airco was purchased by BSA, who did not wish to continue aircraft development or production. Geoffrey de Havilland, the chief designer of Airco then set up the de Havilland Aircraft Company, completing the two partly completed aircraft as DH.18As, with improved engine mountings and undercarriages.

Aircraft Transport and Travel closed down in early 1921, due to competition from subsidised French airlines. In March 1921, the British government granted temporary subsidies for airline services, with the Air Council purchasing a number of modern commercial aircraft for leasing to approved firms.

Editorial summary

This brief starts where responsible research should: with the source description of “De Havilland DH.18” as 1920 biplane airliner by de Havilland. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1919, 1920, 1921—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where Havilland, biplane and airliner can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the general reference register because the source frames it as 1920 biplane airliner by de Havilland. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated May 10, 2026. The linked authority identifier is Q408448. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1919, 1920 and 1921.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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  • Subject orientation
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  • Locating named sources
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The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “De Havilland DH.18”, its source revision and the description used here.
  2. Expand the search: follow De Havilland DH.18 primary sources, De Havilland DH.18 archive and Havilland research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “De Havilland DH.18”?
  2. Which institution is responsible for the underlying evidence?
  3. Which cited source is closest to the event, object or claim?
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Source & attribution

This entry incorporates text from “De Havilland DH.18” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.