How does heat affect airplanes? Turns out heat, speed and density connect to create dangerous situations.

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Sources:
https://www.nytimes.com/2017/06/20/business/flying-climate-change.html
https://www.wired.com/story/phoenix-flights-canceled-heat/
https://www.grc.nasa.gov/www/k-12/airplane/newton3.html
https://www.youtube.com/watch?v=aFO4PBolwFg
http://www.telegraph.co.uk/travel/travel-truths/why-planes-too-hot-to-fly-heat-aircraft/
https://aviation.stackexchange.com/questions/1531/does-temperature-affect-takeoff-performance
http://www.telegraph.co.uk/news/science/science-news/9035708/Cambridge-scientist-debunks-flying-myth.html
http://iopscience.iop.org/article/10.1088/0031-9120/38/6/001/pdf
https://www.flydenver.com/about/press_kit/runways_airfield

Images:
https://commons.wikimedia.org/wiki/File:Phoenix_(4270737598).jpg
https://commons.wikimedia.org/wiki/File:Runway_8_26_markings,_DEN.jpg
https://commons.wikimedia.org/wiki/File:DEN_airport_jpg.jpg