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| de Havilland DH.88 Comet | |
|---|---|
| Name | de Havilland DH.88 Comet |
| Caption | DH.88 Comet racer "Grosvenor House" at the SBAC show |
| Role | Air racer / mail plane |
| Manufacturer | de Havilland |
| First flight | 1934 |
| Primary user | Private owners |
| Produced | 1934–1935 |
de Havilland DH.88 Comet The de Havilland DH.88 Comet was a British twin-engined, low-wing monoplane designed for the 1934 MacRobertson Air Race between England and Australia, built by de Havilland Aircraft Company under the direction of designer Sir Geoffrey de Havilland and chief engineer Arthur Hagg. The Comet combined advances from the de Havilland DH.84 Dragon and de Havilland Moth series with racing optimizations inspired by contemporaries such as the Gee Bee racers and the Percival Gull, enabling headline-making performances at events including the MacRobertson Air Race and exhibitions at the Royal Air Force Museum and Farnborough Airshow. Commissioned by businessman Frank T. Barnard patrons including Thomas Sopwith allies, the Comet established a legacy influencing later designs like the de Havilland Mosquito and informing aeronautical practices used by companies such as Handley Page and Avro.
The DH.88's conception occurred within the de Havilland Aircraft Company design office during the early 1930s under Geoffrey de Havilland, Arthur Hagg and aerodynamicist A. E. Hagg, drawing on experience from the Airco DH.9 lineage and lessons learned from Royal Air Force operations and Imperial Airways long-range services; prototypes were built at Hatfield Aerodrome and tested against contemporaries at Heston Aerodrome and Hendon Aerodrome. The fuselage used plywood monocoque techniques similar to the de Havilland DH.88 Comet's parent company's earlier de Havilland Tiger Moth production methods while adopting streamlining principles pioneered in work with Frank Barnwell and the Royal Aircraft Establishment; powerplants were two Gipsy Six engines developed by de Havilland Engine Company to balance reliability and specific power for the MacRobertson Air Race. Structural arrangements and weight-saving measures referenced research at the National Physical Laboratory and design precedents from Fokker and Junkers exports, while cockpit layout and navigation accommodations took cues from Imperial Airways long-distance flyers and the navigational practice common to crews that had flown Sydney routes.
The DH.88 featured a low-wing cantilever monoplane configuration with retractable tailwheel undercarriage, wooden stressed-skin construction, twin de Havilland Gipsy Six inline engines, and a maximum speed competitive with contemporary racers from United States manufacturers; design documentation compared performance metrics against entries from Howard Hughes associates and continental builders such as Messerschmitt. Dimensions, fuel capacity and range were optimized for the MacRobertson Air Race route between Sussex and Melbourne with radiators and oil coolers influenced by cooling solutions trialed at the Royal Aircraft Establishment and the National Advisory Committee for Aeronautics. Aerodynamic features such as smooth faired engine nacelles, spatted wheels and tapered wings owed theory to studies published by R. T. Jones and tests at the Aero Club of Great Britain, while onboard instrumentation incorporated radio and navigation gear akin to sets used by Imperial Airways and crews flying to Ceylon and Singapore.
After completion at Hatfield Aerodrome the four Comets entered service primarily as race entrants and exhibition aircraft, flown by crews including Charles Scott and Tom Campbell Black who campaigned "Grosvenor House" to victory; post-race operations saw Comets used on mail and record-attempt flights touching Egypt, India, Ceylon, Sumatra and Australia, and later impressed or evaluated by organizations such as the Royal Air Force and private syndicates linked to Blackburn Aircraft. During the late 1930s examples were sold to operators in France, Spain and Portugal and adapted for long-distance flying under owners including members of the Royal Aero Club and patrons associated with Sir Philip Sassoon and Lord Londonderry. Some airframes saw service or evaluation at military facilities like the Farnborough Airfield experimental establishments and private testing at Croydon Aerodrome prior to the outbreak of World War II, when surviving Comets were requisitioned or damaged in operations across Europe and North Africa.
The Comet's most celebrated achievement was the 1934 MacRobertson Air Race victory by the crew of "Grosvenor House", establishing records for stage times and overall elapsed time against entrants from United States, France, Germany and Italy; that campaign placed the DH.88 alongside famous flights such as the transatlantic attempts by Charles Lindbergh and the challenger sorties of Amy Johnson. Subsequent notable flights included long-distance demonstration tours connecting London with Melbourne, speed record sorties over routes linking Cairo and Baghdad and charity flights organized by figures from the Royal Aero Club and members of the British aristocracy; individual Comets also competed at airshows including the SBAC Show and performed cross-continental legs that tested navigation techniques refined at the Royal Geographical Society and practiced by crews trained under navigators from Imperial Airways.
Though built in only four examples, the DH.88 underwent operator-specific modifications such as increased fuel tanks, modified cowling and altered cockpit arrangements by owners connected to Esso, Shell and private racing syndicates; some airframes received radio and instrument upgrades comparable to gear produced by Marconi Company and General Electric suppliers. Proposals and conceptual adaptations considered military conversions and mail-carrying versions evaluated at Farnborough and by technical staffs from Air Ministry allied contractors, while private restorations in the postwar era involved workmanship from workshops linked to de Havilland alumni and preservation groups such as the British Aviation Preservation Council.
Surviving DH.88 airframes have been preserved in museums and collections including institutions akin to the Science Museum holdings, displays at the Royal Air Force Museum and private collections maintained by trusts connected to the Historic Aircraft Collection and the Vintage Aviator Limited; restored examples have appeared at Farnborough Airshow, EAA AirVenture Oshkosh and exhibitions curated by the Museum of Flight and Imperial War Museum. Restoration efforts have involved collaboration among specialists formerly employed by de Havilland Aircraft Company descendants, craftsmen educated at the Brooklands Museum workshops, and donors from aviation foundations tied to families associated with the original racers, ensuring airworthy replicas and static exhibits survive for public study and commemorative flights.
Category:de Havilland aircraft