Supersonic
Man's desire to travel ever faster was met by Concorde - the world's first supersonic passenger airliner, which first flew in 1969.
With delta-shaped wings to enable it to fly at supersonic and subsonic speeds and an engine design that used afterburners to provide the required thrust, it was an engineering miracle.
But although it could land passengers in New York three-and-a-half hours after leaving London - less than half the subsonic journey time - its life was limited by the cold reality of economics.