Originally Posted by SFView

As you may know, the "Aurora" project may be a false name for a "black," possible top secret military project. However, I have suggested the A2 Hypersonic Airliner as a possibility.
See: The hypersonic plane designed to reach Australia in under five hours | Business | The Guardian


...But if you also want an anti-gravity, inertia dampening, zero point energy, ultrasonic airliner/spaceliner too, it could be fun guessing... Now that's real fantasy!