First, begin by folding your your graph paper in half (excluding three boxes on the perforated side). Once the paper has been folded appropriately, make two marks--13 full boxes apart (allow for a further box back behind the airframe). Use a ruler to make a straight line with the length of 13 boxes directly up 1 row of boxes from the two marks you just made. Then make the stabilizers, spars and counterweight as shown.

After the fuselage is made, take another sheet of paper that is folded in half along the lines of boxes. Mark out the wing as shown (1 box of constant chord at the root, with a 1 by 3 rectangular trailing edge behind a 2 by 2 box area of wing with a sweep of 1 boxes of chord eliminated every box away from the fuselage). Then cut the wing out.