Lighting resistant composite structures
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United States of America Patent
Stats
-
Dec 29, 1992
Grant Date -
N/A
app pub date -
Oct 26, 1990
filing date -
Oct 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lightning resistant composite structure, particularly for aircraft, in which a composite skin panel, for example of carbon fibre, is attached to an inner composite structure by one or more lightning resistant fastener assemblies. The fastener assembly comprises a nut and bolt, the bolt being in good conductive contact with a conductive sleeve engaging the skin panel and a non-conductive sleeve engaging the inner structure. The nut is contained within a capped nut assembly located to the undersurface of the inner structure. The non-conductive sleeve and the capped nut assembly isolate the inner structure from the effects of lightning strike, the conductive sleeve providing a high quality conductive interface between the bolt and the skin panel. By this means adverse penetration of lightning current into the inner structure is prevented.
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