KR> hole in LE
I am going to have to patch a hole on the leading edge. matching the contour is easy, but do I have to remove all of the paint, primer, and filling down to the glass to get a good patch adhesion on the 1-2 in around the hole. Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com
KR> hole in LE
Yes, and that is a good thing. Sand down to the glass about 3" all the way around the hole. Put in some more foam if you need to and sand the foam down so it is just a tiny bit lower than the glass. Cut out one glass patch about 1/2" bigger than the hole all the way around, one about 1" bigger, and one about 2" bigger than the hole. Use just epoxy with no micro and put on the three patches. After you have the patches on cover them with bagging film or peel ply and tape them on snug so they pull all the glass and epoxy up against the leading edge. The great thing about having to sand the filler and primer off is that after you lay the new glass on and snug it up tight while it dries you should be left with a repair that is slightly below the level of the paint on the unrepaired area. I had to cut holes in my wing to put in more aileron hinge nut plates and did this. After the patches dried I just sanded them a little and rolled on some Smooth prime a little thick to get a perfectly level surface with the unrepaired area. No filler was required in my case. Be sure to cover the repair with something stretched over the leading edge to keep the new glass pushed down against the old glass when it dries. That will prevent you from having to sand down the new glass to get a level surface. For small holes I have just put on a piece of 2" packing tape right over the wet epoxy. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of larry severson Sent: Wednesday, April 28, 2004 8:48 PM To: KRnet Subject: KR> hole in LE I am going to have to patch a hole on the leading edge. matching the contour is easy, but do I have to remove all of the paint, primer, and filling down to the glass to get a good patch adhesion on the 1-2 in around the hole. Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com ___ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> hole in LE
larry, this is roger mitchell, I work at TWA-AA overhaul in KC Mo, when we do composit repairs we use a perferated plastic on the cloth/resin layup then a solid plastic film, tape down firmly both layers, second larger than the first, and use a plastic applicator to push out any air bubbles, on the airliners we use vacumn( 21" hg) for air removal and pressure & heat for curing, probably wouldn't work on a KR. THE NEW " SARAN WRAP " with the cutter works wonderfully. layup is commonly done with the first piece the size/shape of the hole then up to four layers( depending on original thickness) each 1/2 larger than the first on all sides layed on in reverse order. the easy way to accomplish this is to first work epoxy into the cloth between two pieces of heavy plastic film,draw the shapes needed,cut out, and peel-n-stick. if you want you may call me at 816-305-9689 - Original Message - From: larry severson To: KRnet Sent: Wednesday, April 28, 2004 6:48 PM Subject: KR> hole in LE I am going to have to patch a hole on the leading edge. matching the contour is easy, but do I have to remove all of the paint, primer, and filling down to the glass to get a good patch adhesion on the 1-2 in around the hole. Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com ___ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
