Five years before Concorde’s first flight, another majestic supersonic aircraft took to the skies — and almost became the inspiration for an even faster passenger plane. It was the XB-70 Valkyrie, an ...

Aided by a quartet of Rolls-Royce Olympus 593 engines, the Concorde, the world's only commercially successful supersonic passenger plane, was capable of flying at speeds up to 1,354 mph (2,179 kph).

Comparing the Boom Overture to Concorde and its commercial viability.