BECAUSE OF THE DRAG AND FLUTTER AN AIRLINER CANNOT FLY AT 900KM/H AT 400M ALTITUDE WITHOUT TOTAL DESINTEGRATION en.wikipedia.org/wiki/Density_of_air usatoday30.usatoday.com/weather/wstdatmo.htm en.wikipedia.org/wiki/Drag_(physics) en.wikipedia.org/wiki/Aeroelasticity www.faa.gov/regulations_policies/handbooks_manuals/aviation/pilot_handbook/media/PHAK%20-%20Chapter%2010.pdf en.wikipedia.org/wiki/Cruise_(aeronautics) en.wikipedia.org/wiki/Airspeed en.wikipedia.org/wiki/Flight_envelope en.wikipedia.org/wiki/Aircraft_approach_category en.wikipedia.org/wiki/Coffin_corner_(aerodynamics) en.wikipedia.org/wiki/High-altitude_military_parachuting www.dailymail.co.uk/news/article-2576641/Terror-fears-missing-777-grow-Identities-ANOTHER-two-passengers-probed-suspicion-falls-four-booked-Chinese-airline.html