Ed nailed down what and how. As far as for a pylon plane I would hazzard a no. I feel the drag from the elevon set up would be more than a standard set up. It would turn real tight though. Tough to see a plane set up for elevons too. I can see little or no advantages over standard construction. However I would never reccomend against some experimentation. If the idea intrigues you. Go for it. Enjoyment is what this hobby is all about. I would just say to not put all your eggs into one basket. use the concept as a second choice. Who knows maybe you can come up with something no one has thought of yet. Good luck with the project. BTW elevon set ups are part of most computer radio's. And with one seting elevons up would be a snap.

Mark Shuman