This dataset contains RGB images of a fixed-wing UAV captured from a tail-mounted camera for flap angle detection. The images are annotated into six classes: Left Flap Down, Left Flap Neutral, Left Flap Up, Right Flap Down, Right Flap Neutral, and Right Flap Up. The dataset includes variations in depth, lighting conditions, and background complexity, and is intended for YOLO-based object detection and UAV control surface monitoring research.