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Old 14th Jun 2009, 04:28
  #1429 (permalink)  
pattern_is_full
 
Join Date: Jan 2008
Location: Denver
Posts: 1,011
fun123 - take a look at the first photograph someone linked to in the post right below yours:

The hinge geometry is such that the spoiler lifts up over the wing surface slightly, so more likely the spoiler would crease (cut into) the wing skin than the other way around if it were forced up by airflow or water impact.

Also note that there is no wing skin under the spoilers - they lie above the flaps when everything is retracted, and over an open hole when everything is deployed. So the structure right there is rather skeletal - a framework for a lot of moving surfaces (albeit strong to carry the aerodynamic forces those surfaces create when they hang out in the breeze).
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