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5. Turn on the vacuum pump. The bag will pull down quickly over the part. Check the reading on the vacuum gauge. It should read between 18 and 24 inches of Hg depending on your altitude. Use a squeegee over the outside of the bag to smooth out the bag surface and help the bag pull tight around the edges of the part. The squeegee will also smooth out any edges in the layup under the Mylar and move any excess epoxy off to the edges. 6. Keep the wing under vacuum for at least 24 hours. REMOVING WING FROM VACUUM BAG 1. Unclip bag 2. Slowly and gently, separate Mylar surface from Nylon bag and pull wing out from one end. 3. Gently peel off Mylar (to be reused) from wing. 4. Discard any one-time-use materials (perf ply, breather). 5. Keep bag for reuse. 6. Clean off vacuum bagging table for the next user. 7. Clean up rest of work area. NOTE: Reference #1 below describes how to paint the Mylar sheets and have the paint transferred to the wing. This gives a smooth shiny painted wing Reference #2 describes using a light colored cloth as the first layer and thus producing a colored wing References: http://www.cstsales.com/vac_wing.html https://www.youtube.com/watch?v=x9OWFZ9ZPhM&feature=youtu.be http://www.westsystem.com/ http://www.fibreglast.com/category/Vacuum_Bagging http://www.cstsales.com/tutorials.html Revision: Original Release 10/31/15 Page | 10PDF Image | Vacuum Bagging Wings Instruction Manual Purdue Univ
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