Learning to Fly: The Wright Brothers Adventure pdf - ER - NASA

11. Cut a 5.5-inch (14-centimeter) piece of thebalsa wood for section A of the skid (from theskid template) and lay it on the template. Cutthe right end to form a 45-degree angle at thevery end. Cut a toothpick for section B to alength of 1.8 inches (4.5 centimeters), alsocutting the end of it at a 45-degree angle. Gluethe 45-degree ends of the toothpick and thebalsa wood piece together to form a 90-degreeangle, as shown. Make a second skid byrepeating the process.11.45°12. Turn the elevator assembly over and poketwo holes through the lower elevator, midwaybetween the front and rear spars of each ofthe spar pairs that are next to the center pairof spars (near the third rib mark from eitherend). Push the top of the skid assemblythrough the hole just made, add a bit of glue,and then stick the skid into the upper elevator.Repeat with the second skid as shown.12.13. Cut the pointed ends off of three toothpicksso that they are 1.8 inches (4.5 centimeters)in length and place them as cross-bracesacross the skids as shown, one at the rightangle of the skid, one at 2.8 inches (7 centimeters)from the right angle, and one at 3.5inches (9 centimeters).13.Learning to Fly: The Wright Brothers’ Adventure68EG–2002–12–007–GRC