(Fairey) Delta 2 & BAC221 @·AIRCRAFTUBE

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    Fairey Delta Original
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  • XG774 Farnborough 08.09.56 XG774 Farnborough 08.09.56
    XG774 Farnborough 08.09.56
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    Peter Twiss
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  • Fairey Delta 2 Fairey Delta 2
    Fairey Delta 2
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    WG774
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  • Formation Formation
    Formation
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    Fairey Delta 2
  • BAC221 Farnborough BAC221 Farnborough
    BAC221 Farnborough
  • WG774 WG774
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  • BAC221 BAC221
    BAC221
  • BAC221 BAC221
    BAC221

Fairey Delta 2 & BAC221

The Fairey Delta 2 or FD2 (internal designation Type V within Fairey) was a British supersonic research aircraft produced by the Fairey Aviation Company in response to a specification from the Ministry of Supply for investigation into flight and control at transonic and supersonic speeds.

The aircraft was the first to exceed 1000 mph, and held the World Air Speed Record for over a year.

Design and development

The design was a mid-wing tailless delta monoplane, with a circular cross-section fuselage and engine air-inlets blended into the wing roots. The engine was a Rolls-Royce Avon RA.14R with an afterburner. The Delta 2 had a very long tapering nose which obscured forward vision during landing, take-off and movement on the ground. To compensate, the nose section and cockpit drooped 10°, in a similar way to that used later on Concorde. Two aircraft were built: Serial numbers WG774 and WG777.

The FD2 was used as the basis for Fairey's submissions to the Ministry for advanced all weather interceptor designs leading to the Fairey Delta 3 for the F.155 specification, but it never got past the drawing board stage.

Testing

The first FD2 was aircraft WG774 which made its maiden flight on 6 October 1954, flown by Fairey test pilot Peter Twiss. On 17 November 1954, WG774 suffered engine failure on its 14th flight when internal pressure build-up collapsed the fuselage collector tank when heading away from the airfield at 30,000 ft (9,100 m), 30 mi (50 km) after take-off from Boscombe Down. Fairey pilot Peter Twiss, ex-Fleet Air Arm, managed to glide to a dead-stick landing at high speed on the airfield. Only the nose gear had deployed, and the aircraft sustained damage that sidelined it for eight months. Twiss, who was shaken up by the experience but otherwise uninjured, received the Queen's Commendation for Valuable Service in the Air.

The FD2 test programmme did not resume until August 1955. On 10 March 1956 the aircraft broke the World Air Speed Record, raising it to 1,132 mph (1,811 km/h), an increase of some 300 mph (480 km/h) over the record set in August 1955 by an North American F-100 Super Sabre. It thus became the first aircraft to exceed 1,000 mph (1,600 km/h) in level flight. This record stood until 12 December 1957 when it was surpassed by a McDonnell JF-101A Voodoo of the United States Air Force.

BAC 221

The first Delta 2, WG774, was later rebuilt by British Aircraft Corporation (BAC) in 1960 as the ogee-ogive wing form aircraft BAC 221. This was for aerodynamic research as part of the Concorde development programme. It featured a new wing, engine inlet configuration, a Rolls-Royce Avon RA.28, modified vertical stabiliser and a lengthened undercarriage to mimic Concorde's attitude on the ground. It first flew in this form on 1 May 1964. It was used from 1964 until 1973.

Survivors

  • WG774, in BAC 221 form, is now on display alongside the British Concorde prototype at the Fleet Air Arm Museum at Yeovilton.
  • WG777 is preserved at the Royal Air Force Museum at RAF Cosford, alongside many other supersonic research aircraft.

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This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Fairey Delta 2 of Wikipedia ( authors )

Specifications (Fairey Delta 2)

  • Length : 51 ft 7 in (or 15.7 m).
  • Height : 11 ft (or 3.4 m).
  • Wingspan : 26 ft 10 in (or 8.2 m).
  • Wing area : 360 ft² (or 33 m²).
  • Empty weight : 11,000 lb (or 4,990 kg).
  • Loaded weight : 13,884 lb (or 6,298 kg).
  • Max takeoff weight : 13,884 lb (or 6,298 kg).
  • Maximum speed : >1,300 mph (>2090 km/h).
  • Range : 830 mi (or 1,336 km).
  • Service ceiling : 48,000 ft (or 14,640 m).
  • Rate of climb : 15,000 ft/min (or 76.2 m/s).
  • Powerplant : One Rolls-Royce Avon RA.28 turbojet.
  • Thrust : 10,000 lb (or 4536 kg).

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This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Fairey Delta 2 of Wikipedia ( authors )
Fairey Delta 2 & BAC221 : Your comments on this subject
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