Many years ago, after I had modified the Barnaby model Paper Glider to the form found in about, I realized it could be the basis of a biplane paper airplane. The model above is one example. It is made from a single sheet of paper, cut one-third, two-thirds. The one-third makes the upper wing, the two-thirds the lower wing and fuselage. The wingtips of each are inserted one into the other, and the center folds are connected by a mailing label folded and cut to make a brace. These fly pretty well, a higher sink rate than the barnaby, but loops and circles are possible; just throw harder.
