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De Havilland Dolphin

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Title: De Havilland Dolphin  
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De Havilland Dolphin

DH.92 Dolphin
Side drawing of the D.H. 92 Dolphin.
Role Twin-engined biplane airliner
National origin United Kingdom
Manufacturer de Havilland
First flight 1936
Retired 1936
Status Scrapped
Number built 1

The de Havilland DH.92 Dolphin was a 1930s British prototype light biplane airliner designed and built by de Havilland aircraft company.[1][2]

Design and development

The Dolphin was designed as a modernised version of the de Havilland Dragon Rapide, incorporating ideas from the company's DH 86A and de Havilland Dragonfly but using new main assembly designs. It had[1] a DH 86A style nose to accommodate two crew side-by-side and increased span wings of unequal span, Dragonfly-like. It first appeared with the trousered undercarriage of these earlier biplane transports, but a retractable landing gear, rather like that of the DH.88 Comet was fitted before flight. Onboard air-stairs were one of the passenger access novelties.[3] It was powered by two 204 hp (152 kW) de Havilland Gipsy Six piston engines. Fuel tanks were in the wings, as in the Dragonfly, to avoid the fire hazard[4] of the Rapide's engine nacelle tanks.

One prototype was built and first flown 9 September 1936. Geoffrey de Havilland's log shows[5] he flew it only once more. No others were built as it proved to be too heavy structurally and the prototype was scrapped in December 1936.[6]

In an edition of Flight magazine September 10, 1936 the decision to discontinue the type was published as follows:

Specifications

Data from [6]

General characteristics
  • Crew: 2
  • Capacity: [3] 8
  • Length: 36 ft 0 in (10.97 m)
  • Wingspan: 50 ft 6 in (15.39 m)
  • Height: [3] 10 ft 3 in (3.12 m)
  • Wing area: 393 ft2 (36.5 m2)
  • Gross weight: 6,600 lb (2,994 kg)
  • Powerplant: 2 × de Havilland Gipsy Six Series II 6-cylinder inverted air-cooled engines, 204 hp (152 kW) each

Performance

  • Maximum speed: estimated 161 mph (258 km/h)

See also

Related development
Related lists

Notes

  1. ^ a b Jackson 1978, p.385-7
  2. ^ Jackson 1973, p 382
  3. ^ a b c Hayes 2003 p.152
  4. ^ Hayes 2003 p.178
  5. ^ Jackson 1978, p.386
  6. ^ a b Jackson 1978, p.387
  7. ^ http://www.flightglobal.com/pdfarchive/view/1936/1936%20-%202488.html

References

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