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Lightning Surpression On The 787  
User currently offlinejustloveplanes From United States of America, joined Jul 2004, 1062 posts, RR: 1
Posted (4 years 7 months 5 days 3 hours ago) and read 3128 times:

How much testing has Boeing done with lightning suppression on the 787? Can they accurately imitate a severe lightning strike? How have they acheived a confidence level to address this issue given the good history of Aluminum airliners in this area?

2 replies: All unread, jump to last
 
User currently offlineKELPkid From United States of America, joined Nov 2005, 6423 posts, RR: 3
Reply 1, posted (4 years 7 months 5 days 2 hours ago) and read 3108 times:

It will be addressed....simulated lightning strikes are part of the certification for a new aircraft   Composite aircraft tend to have wire mesh embedded into the outermost layer of composite to create a Faraday Cage (just like a metal aircraft...)


Celebrating the birth of KELPkidJR on August 5, 2009 :-)
User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 2, posted (4 years 7 months 4 days 23 hours ago) and read 2990 times:

Quoting justloveplanes (Thread starter):
How much testing has Boeing done with lightning suppression on the 787?

Lots. Many years in the case of 787 specifically, more than 20 years for the general case of CFRP primary structure. Don't forget, the pointy bits (radome, nacelles, wingtips, empennage) get a disproportionate share of lightning damage and those have been CFRP (except the radome) for 15+ years.

Quoting justloveplanes (Thread starter):
Can they accurately imitate a severe lightning strike?

Yes.

Quoting justloveplanes (Thread starter):
How have they acheived a confidence level to address this issue given the good history of Aluminum airliners in this area?

Yes.

Quoting KELPkid (Reply 1):
It will be addressed....simulated lightning strikes are part of the certification for a new aircraft

Absolutely true. Actual lightning strikes, though not an intentional part of a test program, often occur during precipitation static testing (which is required) as well.

Tom.


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