Percival P.74
...that the British Percival P.74 helicopter project was canceled in 1956 because the aircraft was unable to fly?
...that the <a href="./United_Kingdom" id="mwCaw" rel="mw:WikiLink" title="United Kingdom">British</a> <b id="mwCa0"><a href="./Percival_P.74" id="mwCa4" rel="mw:WikiLink" title="Percival P.74">Percival P.74</a></b> helicopter project <i id="mwCa8">(pictured)</i> was canceled in <a href="./1956" id="mwCbA" rel="mw:WikiLink" title="1956">1956</a> because the aircraft was unable to fly?