BAC / Aérospatiale Concorde
The Concorde is an engineering and esthetical masterpiece, but also a commercial disaster. The supersonic aircraft was a big technological achievement and brought an enormous advance in aeronautics. Although the Concorde was a means of travel for rich people only, even for simple not-so-rich people like me it was a feast to see it. The Concorde is a very elegant and beautiful appearance and made everybody's heart beating faster when taking off or approaching the runway.
It is a pity that these aircraft, of which only twenty were built, are not in service any longer. In spite of all elegance they are noisy, very fuel-demanding and not really economically to operate. The disaster in 2000, when an Air France Concorde crashed near Charles de Gaulle Airport, meant the beginning of the end. But although the Concorde is not in service any more, it is one of my favourite aircraft. And not only one of mine.