Atmospheric icing

Atmospheric icing

Atmospheric icing occurs when water droplets in the air freeze on objects they contact. This is very dangerous on aircraft, as the built up ice changes the aerodynamics of the flight surfaces, and can cause loss of lift, with an increased risk of a subsequent crash.

Not all water freezes at 0°C or 32°F. Liquid water below this temperature is called supercooled, and such supercooled droplets cause the icing problems on aircraft. Below -20°C, icing is rare because clouds at these temperatures usually consist of ice particles rather than supercooled water droplets. Below -40oC it is generally accepted that icing on aircraft is negligible.

Icing also occurs on towers, wind turbines, boats, oil rigs, trees and other objects exposed to low temperatures and water droplets.

ee also

*Deicing
*Anti-icing
*Ice protection system

References

[http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/F5BD7904E845409D862569AE00783347?OpenDocument FAA (U.S.) Advisory Circular 20-113] : Pilot Precautions and Procedures to be taken in Preventing Aircraft Reciprocating Engine Induction System and Fuel System Icing Problems

[http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/A6B4EB947B007B3C862569BD006871B5?OpenDocument FAA (U.S.) Advisory Circular 20-117] : Hazards Following Ground Deicing and Ground Operations in Conditions Conducive to Aircraft Icing

[http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/9F369F487492E0CD86256E31006C881C?OpenDocument FAA (U.S.) Advisory Circular 20-147] : Turbojet, Turboprop, and Turbofan Engine Induction System Icing and Ice Ingestion

[http://virtual.vtt.fi/virtual/arcticwind/experience.htm Wind Energy in Cold Climates] : Icing on wind turbines

External links

* [http://online.wsj.com/article/SB120753185285993925.html? Airline Regulators Grapple With Engine-Shutdown Peril] WSJ April 7 2008


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Icing — can refer to: *Atmospheric icing *Icing (food) *Icing (shipping) *Icing (ice hockey) *Icing by Claire s *A periglacial ice sheet (aufeis) …   Wikipedia

  • Icing conditions — In aviation, icing conditions are those atmospheric conditions that can lead to the formation of water ice on the surfaces of an aircraft, or within the engine as carburetor icing. Inlet icing is another engine related danger, often occurring in… …   Wikipedia

  • icing — /uy sing/, n. 1. a sweet, creamy spread, as of confectioners sugar, butter, and flavoring, for covering cakes, cookies, etc.; frosting. 2. Meteorol. a coating of ice on a solid object. Cf. glaze, rime1. 3. Aviation. the freezing of atmospheric… …   Universalium

  • icing — ic•ing [[t]ˈaɪ sɪŋ[/t]] n. 1) coo a sweet mixture, as of sugar, liquid, butter, and flavoring, used as a creamy or hard coating on cakes, cookies, etc.; frosting 2) mer Meteorol. a coating of ice on a solid object 3) aer. the freezing of… …   From formal English to slang

  • moderate icing — Atmospheric conditions in which the rate of ice accumulation is such that even short encounters become potentially hazardous and the use of de icing or anti icing equipment or diversion is necessary …   Aviation dictionary

  • Carburetor icing — Carburetor (or carburettor) icing is an icing condition which can affect any carburetor under certain atmospheric conditions. While it applies to all carburetors, it is of particular concern in association with piston powered aircraft,… …   Wikipedia

  • carburetor icing — The formation of ice on the throttle plate or valve during certain atmospheric conditions. As the fuel nozzles feed fuel into the air horn it turns to a vapor. This robs heat from the air and when weather conditions are just right (fairly cool… …   Dictionary of automotive terms

  • light icing — An atmospheric condition in which the rate of ice accumulation may create a problem if flight is prolonged in this environment for over one hour …   Aviation dictionary

  • Deicing — An Aeroflot Airbus A330 being de iced at Sheremetyevo International Airport …   Wikipedia

  • Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”