Greetings,

I had posted a thread before about the fact that I had to lengthen the main spar on my LT-40 wing. I proceded to CA the extra quarter inch that I needed to make it the right length. I then posted here and was recommended to either leave it alone, put a dowel into a drilled hole, or do a scarf joint.

Of the three choices, I have narrowed it down to leave it alone or a scarf joint. I could easily cut the extended piece off and create a scarf joint. From what I can gather you would simply cut the piece six times the width. In my case, the spar is 1/2". So I would cut an angled piece of wood with the hypotenuse being 3"? Is this simply to create more surface area for the CA to bond to? BTW, the main spar is spruce. I would have to do this with both the spruce and the balsa spars.

I am trying to build this kit as "perfectly" as possible. Not only for the challenge of learning new building techniques etc, but so I can have a nice flying solid plane when I am done.

Also, to make my situation more clear hear is a picture. You can see that the last rib notch on the left is slightly off the line-up, I originally cut the spars according to the plan, but since the last W5 rib notch was beyond where I made the cut, I CA'ed those 1/4" pieces in. Based on what you see and the location of the gluing (This is at the wing tip, not the wing root and there will also be another spar at the top which will help support any stresses), should I transform this to a scarf joint?