Airco DH.9C
1921 biplane airliner by Airco
The Airco DH.9C was a British passenger aircraft.
Development and design
After World War I there were many surplus Airco DH.9 light bombers, designed by Geoffrey de Havilland, available for the emerging air transport business. At first stripped DH.9s were used to carry one passenger behind the pilot in the gunner's position, but later versions, designated DH.9B, added a second passenger seat ahead of the pilot. A second seat behind the pilot was added by extending the rear cockpit in the early DH.9C. Later it had this rear position converted to hold two passengers face to face, protected by a faired dorsal canopy or cabin. Most of these later four-seat aircraft had slight sweepback to counter the rearward shift in the centre of gravity.
The DH.9, DH.9B, and DH.9C were dimensionally similar, with the same wingspan and height and only small variations in length depending on the powerplant. They were two-bay tractor biplanes, with fixed two-wheel main and tail-skid undercarriage. Their structures were of spruce and ash, wire-braced and fabric-covered.
The first four-seat, swept DH.9C, G-EAYT received its certificate of airworthiness on 13 January 1922.
Operational history
Nineteen aircraft were produced for operators, 13 in the United Kingdom, three in Australia, and three in Spain.
This brief starts where responsible research should: with the source description of “Airco DH.9C” as 1921 biplane airliner by Airco. Everything that follows is an evidence route, not borrowed authority.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 11, 2026. The linked authority identifier is Q4698489. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1922.
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This entry incorporates text from “Airco DH.9C” 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.