Второй самолет F.D.2 совершил первый полет в Боскомб-Дауне в феврале 1956 года, в дальнейшем уже оба самолета использовались в разнообразных исследовательских проектах. В конечном итоге первый самолет был передан компании
"British Aircraft Corporation", получив обозначение BAC.221, и был оснащен для испытаний в аэродинамической трубе полностью новым оживальным крылом той формы, которая впоследствии использовалась на самолете Aerospatiale/BAC Concorde. BAC.221 имел носовую часть, которая могла опускаться для улучшения видимости при взлете и посадке, что было также затем использовано на Concorde. Оба экспериментальных самолета сохранились до настоящего времени.
Type 221 WG774 piling on the power for take-off at the 1964 Farnborough show.
The ground 'sit' of the 221 is well illustrated in this picture taken at the 1964 Farnborough show.
WG774 now resides at the Fleet Air Arm Museum, Yeovilton, aptly in the company of Concorde 002.
Another view of the Type 221 being rolled out after completion at BAC's Tilton works. The press release stated that the 221 "is specifically intended for investigating the handling properties of the slender delta and for flight research into the aerodynamic characteristics of this planform in the subsonic, transonic and supersonic speed ranges."
Construction of the BAC 221 research aircraft was completed in October 1963
During the summer of 1959, the first of the two Fairey FD.2 high speed research deltas, WD 774, was singled out for major modification to help with the high speed phase of Concorde wing development. Transferred from the RAE, Bedford to BAC's Filton facility, WD 774 underwent major surgery, to emerge four and a half years later as the BAC 221, as seen here at its roll-out. First flown in this guise with its new ogival wing on 1 May 1964, this machine returned to RAE, Bedford in May 1966, from where it continued to fly for the next eight and a half years.
The BAC Type 221 on the day of its roll-out in July 1963. Note the spindly new undercarriage compared to the Fairey Delta 2 - the main gears were new but based on the design used for the English Electric Lightning
WG774 demonstrates its droop nose capability as it passes the camera
BAC 221 research aircraft with landing gear extended and nose drooped for improved forward view during the landing approach
Rare photograph of two of the many research aircraft operated by Bedford. In the lead is the unique HP.115 XP841 involved in research into the low-speed handling characteristics of slender delta-wing aircraft. It first flew at Bedford on August 17, 1961. Behind is the BAC 221 WG774 converted from a Fairey Delta 2. It was given an ogival wing for highspeed research trials and operated by Aero Flight at Bedford until 1974.
Патент на отклоняемую носовую часть фюзеляжа самолета BAC 221 перешел к фирме "Westland", когда та слилась с фирмой "Fairey", затем патент купила фирма BAC для использования его в конструкции самолета Concorde.
Because of the basic similarity between the wing plan forms of the Type 221 and Concorde, it was announced by BAC’s press office that "the 221 research programme will make an important contribution to Concorde development."
Rare picture of WG774 (Type 221) and WG777 in flight together.
Compared to the Delta 2, the elevators and ailerons of the Type 221 had increased area, as is evident in this view.
Note the 221's cine camera bullet fairing on top of the fin which is quite prominent in this picture; the camera was used to record airflow patterns
The original proposal for the Delta 2 fitted with an ogee wing as 'Project 86', September 1958. Note the above wing intake position and the old delta wing also outlined on the plan view
BAC 221 ogee-wing research aircraft
BAC 221 ogee-wing research aircraft