Takeoff speed is the minimum speed an aircraft must reach to become airborne. This speed varies based on several factors, including the aircraft's weight, wing design, and environmental conditions like wind and temperature. Pilots calculate this speed to ensure a safe and efficient departure from the runway. During takeoff, the aircraft accelerates down the runway until it reaches this critical speed. Once achieved, the pilot can pull back on the controls, allowing the wings to generate enough lift to raise the aircraft off the ground. Properly managing takeoff speed is essential for flight safety.