Editing De Havilland Comet (section)

===Comet 1===
[[File:Aeromaritime de Havilland Comet 1 Groves.jpg|thumb|[[Union Aéromaritime de Transport]] Comet 1A at [[Le Bourget Airport]] in 1952]]

The '''Comet 1''' was the first model produced, a total of 12 aircraft in service and test. Following closely the design features of the two prototypes, the only noticeable change was the adoption of four-wheel bogie main undercarriage units, replacing the single main wheels. Four Ghost 50 Mk 1 engines were fitted (later replaced by more powerful Ghost DGT3 series engines). The span was {{cvt|115|ft}}, and overall length {{cvt|93|ft}}; the [[maximum takeoff weight]] was over {{cvt|105000|lb}} and over 40 passengers could be carried.<ref name=walker190>Walker 2000, p. 190.</ref>

* An updated '''Comet 1A''' was offered with higher-allowed weight, greater fuel capacity,<ref name=1A/> and water-methanol injection; 10 were produced. In the wake of the 1954 disasters, all Comet 1s and 1As were brought back to Hatfield, placed in a protective cocoon and retained for testing.<ref>[https://www.rafmuseum.org.uk/research/archive-exhibitions/comet-the-worlds-first-jet-airliner/last-comet-1/ "Last Comet 1."] ''Royal Air Force Museum Cosford''. Retrieved 1 November 2010.</ref> All were substantially damaged in stress testing or were scrapped entirely.<ref name=Walker40/>
* '''Comet 1X''': Two RCAF Comet 1As were rebuilt with heavier-gauge skins to a Comet 2 standard for the fuselage, and renamed Comet 1X.<ref name=Jones68>Jones 2010, p. 68.</ref>
* '''Comet 1XB''': Four Comet 1As were upgraded to a 1XB standard with a reinforced fuselage structure and oval windows. Both 1X series were limited in number of pressurisation cycles.<ref name=Walker40>Walker 2000, p. 40.</ref>
* The '''DH 111 Comet Bomber''', a nuclear bomb-carrying variant developed to [[Air Ministry specification]] B35/46, was submitted to the Air Ministry on 27 May 1948. It had been originally proposed in 1948 as the "PR Comet", a high-altitude photo reconnaissance adaptation of the Comet 1. The Ghost DGT3-powered airframe featured a narrowed fuselage, a bulbous nose with [[H2S radar|H2S Mk IX]] radar, and a four-crewmember pressurised cockpit under a large bubble canopy. Fuel tanks carrying {{convert|2400|impgal|L}} were added to attain a range of {{convert|3350|mi}}. The proposed DH 111 received a negative evaluation from the [[Royal Aircraft Establishment]] over serious concerns regarding weapons storage; this, along with the redundant capability offered by the RAF's proposed [[V bomber]] trio, led de Havilland to abandon the project on 22 October 1948.<ref>Walker 2000, pp. 171–172.</ref>