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to an existing plane. do you mean by effect that it will just add like the extra range or something? by visual do you just mean that you wont be able to see them? is the flight dynamics file the aircraft.cfg? but could you visually insert them by putting them in the wing textures?

as people are no doubt aware, the Boeing 767-300 is now equipped with blended winglets. and i have heard that no suppliers(Project Opensky or Level-D Simulations) will be creating an update for their products with these winglets. where would i get source files and how would i add them to the model?

1. how would i create one?
2. is it easy?
I spent my first two years working on a freeware Socata TB20GT model, then began my current six year stint as a professional 3d modeler and gauge programmer for Eaglesoft Development Group.

and, despite the fact that I like to kid and joke with and about Fr. Bill, I daresay that he'll be the first to admit that he is STILL learning as the hobby evolves.