Posted by TomFlyer |
Nov 28, 2009 @ 11:16 AM | 4,002 Views
I have been building slope wings with different leading edges in an attempt to figure out the most durable, most accurate, and easiest to repair. I started with the standard bass wood LE carved and sanded to shape using templates for accuracy.
Next I did a "cast" LE by making a mold using a the foam core cut by CNC guided hot wire. Very accurate, but very time consuming. A little trickey to match up the cast LE with the wing as it has to be cut back at the proper angle so the two parts mate properly. This is a related thread that has some pictures: http://www.rcgroups.com/forums/showthread.php?t=650026
Next method is going to be the best yet (I hope). I plan of bagging a foam core that has an accurate LE, cut off the LE with a 1/8 inch wide table saw blade, replace the foam in the LE with epoxy and microballoones, put on an 1/8 inch thick piece of bass wood, sand that to shape and then glue the hardened LE back onto the wing. Then bag on the final layer of glass for a nice finish. I will probably do a mini-build thread on this.