Archery, Arrows & Arrow Flight - This page has a long discussion of flight mechanics and some good information about tuning up a modern recurve bow. Some of the information is also applicable to traditional longbows (but not the part about sights and buttons, of course). Pinning for reference to read more fully later.
What Is A Recurve Bow? Recurve bows are great for everybody who doesn't like the futuristic looking compound bows, but still want to use sights and other equipment to help him improve his accuracy. http://www.myarcherycorner.com/the-best-recurve-bow-for-beginners