The Bombardier Global 8000 flying over the Farnborough Airshow.John Keeble/Getty ImagesBombardier's Global 8000 is the fastest civil aircraft since Concorde.The world's newest private jet flies just shy of the speed of sound, at Mach 0.95.Bombardier's CEO and chief engineer told Business Insider why they didn't aim to break the sound barrier.The world's newest private jet is breaking speed records, but the manufacturer's CEO and chief engineer s…