Hawker Siddeley Trident
1962 airliner family
The Hawker Siddeley HS-121 Trident (originally the de Havilland DH.121 and briefly the Airco DH.121) is a British airliner produced by Hawker Siddeley.
In 1957, de Havilland proposed its DH.121 trijet design to a British European Airways (BEA) request.
By 1960, de Havilland had been acquired by Hawker Siddeley.
The Trident's maiden flight happened on 9 January 1962, and it was introduced on 1 April 1964, two months after its main competitor, the Boeing 727.
By the end of the programme in 1978, 117 Tridents had been produced. The Trident was withdrawn from service in 1995.
The jetliner is powered by three rear-mounted Rolls-Royce Spey low-bypass turbofans. It has a low swept wing and a T-tail.
Advanced avionics allowed it to be the first airliner to make a blind landing in revenue service in 1965.
The initial Trident 1/2 could seat 101–115 passengers over up to 2,350 nmi (4,350 km).
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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 Sep 20, 2026. The linked authority identifier is Q1423689. The Library of Congress control number is sh2009007167. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1957, 1960, 1962 and 1964.
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This entry incorporates text from “Hawker Siddeley Trident” 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.