The Antipode is the second hypersonic jet by Canadian inventor and engineer, Charles Bombardier. The Antipode design is a 10-seat private jet that uses rocket boosters to take off, detaches the rockets at altitude of 12km, fires its hypersonic engines to hit speeds of Mach 24 (20,000 km/h), and gets you from New York to London in 11 minutes.
To cool the jet from the heat of hypersonic travel.
It would channel some of the air, flowing at supersonic speed, through a nozzle located on the nose of the aircraft, producing a counterflowing jet of air that would induce LPM (a novel aerodynamic phenomenon called ‘long penetration mode), which would in turn lead to a drop in surface temperature due to aeroheating and a reduction of the shockwave and noise caused by breaking the sound barrier.