---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Sun 09/23/07: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:34 PM - Lightening holes in ribs (Scott) 2. 04:02 PM - Re: Lightening holes in ribs (Philippjw54@aol.com) ________________________________ Message 1 _____________________________________ Time: 03:34:18 PM PST US From: Scott Subject: RV4-List: Lightening holes in ribs Bought an OLD wing kit for my RV-4 recently. The lightening holes need to be cut out on the ribs. Does anybody have a pet method for accurately finding the center of the cutout...I will be using a fly cutter to do the cutting job. -- Scott http://corbenflyer.tripod.com/ Gotta Fly or Gonna Die Building RV-4 (Super Slow Build Version) ________________________________ Message 2 _____________________________________ Time: 04:02:44 PM PST US From: Philippjw54@aol.com Subject: Re: RV4-List: Lightening holes in ribs Just make sure when using the fly cutter that the cutting edge of the fly cutter is right on the edge of the circle being cut out. There's no exact science to finding the middle of the circle. By trial and error and with a little patience finding the center of each circle is not really difficult. Put the fly cutter in your drill press and then start by checking at each 90 degree location. If it looks good and your satisfied then go ahead and make your cut. You just need to be brave and go for it. You don't need to be perfect but try for just a little under the maximum hole diameter. Remember, you have a lot of holes to cut and I would start by cutting all the large holes first and work your way through all the ribs. Then go to the next size smaller hole and continue until all those holes are done and then go to the smallest holes and cut them. It will take a couple of nights to complete all the lighting holes but eventually you will finish. Then you have to use a scotch brite pad and polish all the cut edges until there are no rough spots. They should be smooth as a babys bottom. Then prime as soon as you can using your favorite primer. Good luck. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv4-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV4-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv4-list Browse Digests http://www.matronics.com/digest/rv4-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.