Could someone post a picture of a spar and rib from a high-performance metal homebuilt aircraft? I am having trouble finding a good image (or pair of images) that show these parts and I'm trying to show them in a presentation I'm putting together for some local kids (their teacher is a friend of mine). I am trying to show how different types of construction vary and how what the airplane is designed to do changes the design of the aircraft's parts. Even a technical drawing would work but either way I would appreciate it.