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Pilot Handbook chapter 10 outline

Pilot Handbook chapter 10 outline - Chapter 10 Weather...

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Chapter 10: Weather Theory 1. Nature of the Atmosphere a. A blanket of gases provides protection from ultraviolent rays and also  supports the life on the planet i. Nitrogen makes up 78% of the gases in the atmosphere ii. Oxygen 21% iii. 1% is Argon, carbon dioxide and other gases b. Troposphere i. Sea level to 20,000 over north and south pole ii. Sea level to 48,000 over the equatorial regions iii. All weather, clouds, storms, and temp variances  occur here  iv. Temp decreases by 2 ° C every 1,000 ft. v. Pressure decreases at 1 inch per 1,000 ft. gain c. Tropopause i. Top of the troposphere ii. Location of the Jet stream  iii. Possible clear air turbulence d.  Stratosphere i. From tropopause to 160,000 ft. e. Mesosphere i. From 160,000 to 280,000 ft ii. Temp decreases rapidly
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f. Mesopause i. 280,000 ft g. Thermosphere i. Fades into space 2. Oxygen and The Human body a. Nitrogen and other trace gases 79% b. Oxygen 21% c. Average person begins to be impaired at 10,000 ft and some at 5,000 ft 3. Significance of Atmospheric Pressure a. Atmospheric pressure at sea level is 14.7 psi b. Actual pressure at a given place and time will differ with altitude, temp,  and density of air. i. This affects performance aircraft performance 4. Measurement of Atmospheric Pressure a. Mercurial Barometer i. Used in labs or weather stations ii. Not easily transported and difficult to read b. Aneroid Barometer i. Easier to read and transports ii. Not as accurate because of the linkage mechanism c. Standard sea level pressure is 29.92 in. Hg. At 15 ° C(standard day)
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d. Local barometer readings are converted by  adding 1 inch of mercury for 
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