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Wing skin weighted down: 2007-11-13.
Nikon Coolpix 8400
To ensure good, even contact pressure while bonding (and pre-bonding) the upper wing skin, weights are used. I used square steel tubes laid along the leading and trailing edges of the skin panel to keep them straight and laid chipboard, plywood and MDF panels spanning the tubes fore and aft, carrying sandbags and lead weights. There's well over 100kg of weight on there. Note the wooden wedge under the root rib to help keep the wing slightly LE-down, so that the bonding area is roughly horizontal. There's a similar one at the other end of the table, near the double rib BL95-97. Also note the single cleco on the root rib flange for location of the skin, and the clamps along that flange to maintain intimate contact between skin and rib flange.
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