(CNN) — If you’ve seen images of the infamous double-level airplane seat concept and thought “that’s never going to happen” — maybe think again. Aviation start-up Chaise Longue, the brains behind the ...

Supersonic aircraft design has re-emerged as a focal point in aerospace research, driven by the need to develop transport solutions that are both economically viable and environmentally acceptable.

The evolution of the airplane and its performance : a short history -- Aerodynamics of the airplane : the drag polar -- Some propulsion characteristics -- The equations of motion -- Airplane ...