Kites fly because their tilted surface deflects oncoming wind downward, generating lift by Newton's third law while the pressure difference across the fabric (higher below, lower above) adds an aerodynamic component, much like an airplane wing held at a fixed angle of attack. The bridle — the set of lines joining the spine and crossbar to a single tow point — lets the flier tune that angle of attack so the kite finds a stable balance between lift, weight, and line tension. Kites were invented in China roughly 2,500 years ago, originally from bamboo frames and silk or paper skins, and were used for military signaling, meteorology, and later recreation as the design spread along trade routes to Asia, the Middle East, and Europe. The string itself is rarely straight: its own weight and drag make it sag into a catenary-like curve, and the sag flattens as wind strength or line tension increases. Sudden gusts momentarily raise the angle of attack and lift, which is why a kite pitches, banks, and surges forward each time a gust arrives before settling back to its equilibrium point.

• Ideal flying winds are roughly 8–24 km/h (Beaufort force 3–4, "gentle to moderate breeze")
• Typical single-line kite string tension ranges from a few newtons up to 50+ N in strong wind
• Common flying line materials: braided nylon, Dacron polyester, and high-strength Spectra/Dyneema
• A well-trimmed diamond kite typically flies at 10–25° above the horizon relative to the wind line
• Bridle tow-point position shifts the angle of attack — moving it up front makes the kite dive, back makes it climb
• Line sag (catenary droop) increases as wind drops and decreases as tension rises
• Kites were first documented in China around 500 BCE, made from bamboo and silk
• Tails add drag and weight low on the kite, damping yaw oscillation and preventing spinning in gusty air