RE: carbons and recurves???
You can shoot carbons from a recurve (or longbow), and I reckon they will fly good as long as the arrow spine is matched to the bow. One thing you want to be careful of with carbons is make sure the arrow is heavy enough (mass weight) or you risk damaging your bow. I like to stay with at least 8 grains of arrow weight per pound of draw weight. For example, with a bow you are drawing 40 pounds with, you want an arrow that weighs at least 320 grains (total arrow weight).
There are even companies that are marketing carbon arrows specifically for traditional bows, and quite a few people are using them.
Chad