Tag Archives: Airplane

How does a skywriter write in the sky?

To skywrite, the pilot releases smoke-making chemicals into the airplane’s exhaust pipe.  The trail of smoke they produce traces the letters. Skywriting is a method of writing in the sky with an airplane.  A trail of smoke traces the letters.  Most skywriting message are advertisements that promote products advertisers want to sell. The smoke used …

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How does an altimeter work?

An aneroid (barometric) altimeter shows a plane’s altitude above the earth by measuring the atmospheric pressure, which lessens as the altitude increases. An altimeter is an instrument that shows a pilot just how high his airplane is above the earth.  Most altimeters are aneroid (without air) barometers, made to read in feet of altitude instead …

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How do gliders fly?

Gliders soar across the sky by riding on air currents. Airplanes without engines are called gliders.  They are very light, with long, slender wings. A glider can glide downhill on air.  It also can soar  upward on rising wind and heat currents in the air. These updrafts are caused by warm air that rises upward …

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