How To guide

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Vacuum Bagging a High-Performance Wing

 
 
Carefully slide the assembly into the bag. Check one more time that the cores didn't move in the skins/beds and cover the assembly in total with paper towel. Your bagging machine probably came with thick, fuzzy, expendable breather cloth, but I use paper towels because they are a lot cheaper and easier to handle when stuffing all this into the bag.
   
   
Slide the assembly around in the bag so that the nipple where the line connects is on the paper towel, but not on the core beds. When satisfied, seal the bag off and turn on the pump. For a balsa bagged wing with thin skins, 7-11 inches of mercury are what you want. More than that will crush the wing, less will not bond properly. As the bag deflates, you'll need to pull at the edges to get the trapped air out.
   

Cross your fingers, place a flat object on the cores and weight it down. Use a lot of weight. In my case, it's a .50cal ammo box of .223 shells, about 35lbs.

Come back tomorrow!!

   
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