World Library  
Flag as Inappropriate
Email this Article

Thermawing

Article Id: WHEBN0025346230
Reproduction Date:

Title: Thermawing  
Author: World Heritage Encyclopedia
Language: English
Subject: Ice protection system, NASA spin-off technologies
Collection: Aircraft Ice Protection Systems
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Thermawing

The ThermaWing ice protection system uses a flexible, electrically conductive, graphite foil attached to a wing's leading edge. Once activated the foil heats quickly, melting and then shedding any ice.

Contents

  • Background 1
  • Operation 2
  • See also 3
  • References 4
  • External links 5

Background

In 1998 NASA Glenn initiated the research and development of the Thermawing system for general aviation. Supported by the NASA SBIR (Small Business Innovative Research) program Kelly Aerospace Thermal Systems put the system into production. The FAA has certified the heater element configuration.[1]

The original launch of the system was on Columbia Aircraft Manufacturing (now Cessna) 350 and 400 airframes. ThermaWing (formerly EVADE) employs 6 heaters, 3 heater control modules, one main electronic controller and one 7500 watt alternator.

Operation

The outer layer of the laminate is made of heat-conducting polyvinyl chloride. It offers the durability of a fluoropolymer. A zoned heater system is controlled by a solid-state processor. The leading edge (the "impingement" area) is kept warm, continually melting ice as it begins to form. The area just aft, the shedding zone, is normally kept below freezing, causing the streaming water to freeze and collect as ice. During a de-ice cycle the voltage is increased, raising the temperature of this aft shedding zone, melting the ice bond and shedding the ice via aerodynamic force. Once power is removed from the heater, the shedding zone immediately refreezes and resumes collecting ice until the next de-ice cycle. This system takes as little as 1 second per surface and only 33 seconds to deice the entire aircraft using a 60 second cycle.

Once armed, the system is digitally controlled with automatic shedding cycles activating at 41°F.

See also

References

  1. ^ NASA (2007). Spinoff. Washington, DC: U.S. Government Printing Office.  

External links

  • Kelly Aerospace company home page
  • ThermaWing Aircraft Deicing
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.