Definitions for contrails
con·trails

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1. contrails

   Contrails (; short for "condensation trails") or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several miles above the Earth's surface. Contrails are composed primarily of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that exist at high altitudes allows the formation of the trails. Impurities in the engine exhaust from the fuel, including sulfur compounds (0.05% by weight in jet fuel) provide some of the particles that can serve as nucleation sites for water droplet growth in the exhaust. If water droplets form, they might freeze to form ice particles that compose a contrail. Their formation can also be triggered by changes in air pressure in wingtip vortices or in the air over the entire wing surface. Contrails, and other clouds directly resulting from human activity, are collectively named homogenitus.Depending on the temperature and humidity at the altitude the contrails form, they may be visible for only a few seconds or minutes, or may persist for hours and spread to be several miles wide, eventually resembling natural cirrus or altocumulus clouds. Persistent contrails are of particular interest to scientists because they increase the cloudiness of the atmosphere. The resulting cloud forms are formally described as homomutatus, and may resemble cirrus, cirrocumulus, or cirrostratus, and are sometimes called cirrus aviaticus. Some persistent spreading contrails contribute to climate change.

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1. Contrails

   Contrails is a small handbook issued to new cadets entering the United States Air Force Academy. It contains information on United States Air Force and United States military history; Academy history; notable Academy graduates; aircraft, satellites, and munitions in the current U.S. Air Force inventory; transcripts of important national documents such as the Preamble to the Constitution and the full national anthem; and famous quotes, which are usually patriotic or leadership-related. Cadets in their fourth class year are expected to learn most of the information from Contrails, and be able to recite much of it verbatim. Contrails has traditionally been published in the class color—Blue, Silver, Red, or Gold—of the freshman class.

Anagrams for contrails »

1. triclosan

How to pronounce contrails?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say contrails in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of contrails in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of contrails in Pythagorean Numerology is: 3

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Contrails
2. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=contrails