Aircraft Certification (Static Electricity Dischargers)

AI Thread Summary
Static electricity dischargers, or wicks, are crucial for aircraft to mitigate static buildup on wings and bodies, which can interfere with communication and GPS signals. The certification requirements for these wicks are not explicitly detailed in existing regulations like CS 23 or CS 25, which focus more on procedural aspects than technical specifications. Factors such as surface area, aircraft speed, and materials likely influence the placement and effectiveness of these wicks. There is no standardized rule for the number of wicks per wing, and companies often develop proprietary methods or rely on academic research for guidance. The discussion highlights the need for more specific technical standards regarding static discharge wicks in aircraft certification.
murats
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The little wicks placed at the wingtips to get rid of static electricity on the wings and body of the aircraft are vital to aircraft.
I am interested in what the certification requirements for placing these ont he wings. I assue the formula of would include things like
1-surface area
2-speed the aircraft can reach
3-material used on the aircraft...

Is there a quick right hand rule for this ( place at-least 3 per wing type of deal) I assume there was a lot of testing done to figure this out, as the static electricity build up on the winds can mean a big degradation for communication with the tower and GPS signals.

http://www.aerospaceweb.org/question/design/q0234.shtml
 
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Hi,
Sections 23 and 25 are a bit "broad" and doesn't really say specifically anything about calculating the static discharge wicks. It gives a lot of details on procedural items, not technical. Usually companies come up with proprietary ways or some academic papers get released.
I have found these and would like to share with the rest of the community.
http://papers.sae.org/520088/
http://standards.sae.org/arp5672/

Regards,
-M
 
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