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• 20:58, 2 May 2024 MikeLPetersen talk contribs created page Parachute Aerodynamics (Created page with " = AERODYNAMICS AS RELATED TO PARACHUTES = == 4.1 PROPERTIES OF THE ATMOSPHERE == All forces acting on parachutes and all movements of parachutes are affected by the atmosphere, or air, surrounding the Earth. The air at the Earth's surface is approximately 78% nitrogen; 21% oxygen; and 1% a mixture of gases such as argon, neon, helium, water vapor, and carbon dioxide. This chemical composition remains relatively constant to an altitude of about 160,000 feet (50 kilomete...") Tag: Visual edit