Here’s the plan for building the balsa wing.
Ace RC used to produce foam wings which were used in a wide variety of plans published in magazines. The idea was to build a cheap, easy plane without having to cut out ribs. Quite a few of these planes became very popular. Unfortunately the foam wings are no longer available, but you can still build these popular airplanes with a set of balsa ribs to make a wing with the same outline.
With this wing kit, you get 22 ribs and a dihedral brace. Use 1/8 x 1/4 spars and 1/4 x 7/16 balsa leading edge. Sheet the leading edge and trailing edge with 1/16″ balsa sheet, and add cap strips on the ribs between the spar and the trailing edge sheet. For greater durability, sheet the entire wing with 1/16″.
If you prefer a wing with ailerons you can build the wing as shown and add flat 1/8 sheet ailerons. Or you can trim the tails of the ribs, add a balsa trailing edge stick, and add a tapered aileron to replace the part you cut off.