The Concorde was in development for several years, and its advanced technology meant that costs spiralled. It was a very expensive aircraft to buy, fly, and maintain, and it carried relatively few passengers. It also had very high fuel consumption, which in the 1970s (after the 1973 oil crisis) was not popular with airlines. All in all, it was clear to everyone that there would be very little or no market for the aircraft once it was developed. So why did the United Kingdom and France continue to invest in it?
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