Draw line 6″ from long edge of foam board. Draw a 2nd line 8″ from the previous line. Cut remaining foam board off. Save the piece of foam board. This is needed later to make the wing spar. Cut through the top layer and paper and foam board only. DO NOT cut through the bottom piece of paper! Place foam board cut line along straight edge and bend 90 degrees. Draw line 3″ from edge of foam board on the LH and RH side. Cut and remove this piece of foam board. Use a paint can top or other similar item to draw the wing tip radius. Cut through foam board along line to remove from wing tip. Retrieve foam board cut in Step 5. Draw lines using the dimensions shown to create cut lines fro the wing spar. DO NOT cut through the bottom paper. Cut through the top paper and foam board only!