Flaps, or what you call them "wind brakes" aren't really supposed to be brakes, they're used to produce lift for the plane during takeoff and landing procedures, and even to help with combat maneuvers in fighter planes. More lift = faster it will take off and it will stall slower due to an increase of that force.
Wind brakes do exist, but under the name "air brakes" and not much planes besides ones designed for combat have them as a standard.
Here you go, this might help.
http://science.howstuffworks.com/transport/flight/modern/airplanes.htm
Otherwise, i really like your plane, especially the engine.
