--Scarfing is not a big problem and only takes a mater of minutes to accomplish. I have built my entire airframe scarfing the ply by hand. I did not use the disc on a drill method in the assembly manual. I used 1 x 2 pine cut about 18" long and using spray mount adhesive I affixed 80 then 100 then 150 grain sandpaper to each of the 1 x 2. Start with the 80 then end with the 150. (I found out later it should have been 220 but the 150 had worn down to about 220 when I was done.) Using long even pressure and the ply resting even on the edge of the worktable. I was able to get a scarf around 10 times wider then the thickness. To reassure I was staying straight I drew parallel lines 1/8" apart for about 1 1/2". The hardest part is having the second piece match the first one. To get this you should work on an entire 4' section of ply watch the laminates very very close and keep them even. when you rip out each web member you need one will match the other. Problem solved and work continued. Good luck
Steven Phillabaum KR2S; 5048; corvair; Auburn, Alabama ---- Donald Reid <donr...@peoplepc.com> wrote: > At 07:23 AM 1/14/2006, you wrote: > >With the glues that we have today, like T-88, is scarfing really necessary? > >Would not just gluing on a cross member do just as well? I know that the > >woodworking purists will scoff at this, but T-88 won't come apart. If you > >were concerned about the contact area, you could put in a little wider cross > >member. I, personally, do not think that scarfing is any fun and find it > >most difficult to get a straight line. > > Standard aircraft construction practices came about because they work > and other methods don't work as well. There are alternatives to > scarfing that can be used on lightly-loaded, non-critical parts but > they should not be used in a high-stress critical application. My > opinion is that if you don't want to do it right then you should > consider taking up some other hobby. > > > > Don Reid - donreid "at" peoplepc.com > Bumpass, Va > > Visit my web sites at: > >other KRnet info at http://www.krnet.org/info.html
