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Did you know? One of the more fascinating things about contrails is that they don’t actually start the instant they leave the engine. The exhaust leaving a jet engine is far too hot to form visible ice crystals immediately. It first has to mix with the surrounding air, cool down, and reach the point where the water vapour freezes. For most modern airliners, that gap is relatively small.But Concorde wasn’t “most airliners”… Cruising at around Mach 2 (roughly 1,350 mph / 2,170 km/h) and typically between 50,000 and 60,000ft, Concorde could travel hundreds of metres while its exhaust was still cooling.By the time the water vapour had cooled enough to freeze into tiny ice crystals, the aircraft had already raced ahead.The result was a much larger visible gap between the aircraft and the start of its contrail. This is a great example of why contrails are governed by physics, not conspiracy theories. The gap isn’t evidence of a spray system switching on. It isn’t chemicals suddenly being released.It’s simply the time required for hot exhaust gases to cool, mix with the surrounding atmosphere, and freeze into visible ice crystals. The faster the aircraft moves during that process, the further away the contrail appears to begin. Sometimes the best explanation is also the simplest one: thermodynamics doesn’t care about conspiracy theories.. It just keeps doing its job.#Concorde #Contrails #Aviation #Meteorology #ChemtrailDebunker