A vapor cone (also known as a Mach diamond, shock collar, or shock egg) is a visible cloud of condensed water that can sometimes form around an object moving at high speed through moist air, for example, an aircraft flying at transonic speeds.
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Condensation in Exhaust GasesAs the airplane's engines release exhaust gases, moisture vapor is released as well. The cold temperature and low air pressure at high altitudes forces this moisture to condense, which creates the characteristic white smoke trail for which airplanes have become widely known.
He explained, it is really nothing more than the very cold air coming out of the air conditioning forcing the air to release it's moisture. He reiterated that it happens all the time when flying and out of hot and humid locations and crews are looking to cool off the aircraft.
While fuel dumps don't happen every day, they're also not uncommon. Nor do they usually represent a major emergency. In fact if an aircraft is taking the time to dump fuel before landing, that's likely an indication that the issue forcing the plane to land is serious but not critical.
Condensation in Exhaust GasesAs the airplane's engines release exhaust gases, moisture vapor is released as well. The cold temperature and low air pressure at high altitudes forces this moisture to condense, which creates the characteristic white smoke trail for which airplanes have become widely known.
The engines would still be ripped off, baggage hold doors would most likely open on impact. There would have to be some kind of debris field. The plane would sink, but not intact. Something would come free and float to the surface.
Water ( even “glass smooth” water) is not flat. There is a huge danger of hitting a swell and somersaulting, or dipping a wing and cartwheeling. Even with no undercarriage, it is better on land.
The size of the container precludes enough of a potentially explosive liquid from being carried on board. If you really want to get that bottled water past the security checkpoint, there is a workaround: Just freeze it. TSA allows for frozen liquids so long as they're completely solid.