Finishing the wings

Mark the hinge line for the ailerons on the wing. Notice that the 1/4" facing for the wing extends past the aileron cut out, this is important.

Using a band saw preferrably, cut the ailerons off. make sure the cut line stays in the area where material will be removed for the facings. I usually make the first cut close to the wing line, and then cut the remaining off the aileron. Do these steps with the wing and aileron in the shuck so everything stays straight!

Now cut a piece of light 1/4" balsa for the wing facing and glue in place. take your time fitting this piece; glue isn't very strong and it's heavy. Sand it to fit snugly everywhere, especially inside of the aileron cut out towards the root.

Glue a piece of 3/8" light balsa to the ailerons. be careful to keep these straight, they will want to try and bow on you. use tape and set it nice and straight, and lay it on the face to dry. I use polyurethane glue for this step as it doesn't "wet" the wood and make it warp.

After everything dries, sand flush.

Now cap all of the ends with 1/8" light balsa the same way. let dry and sand.