"So, rotorcraft don't land like airplanes?" Robin asked seeing an airplane flying across the sky. "That's correct. Airplanes need a long strip of hard ground to land on. These are called runways. Small airplanes use short runways. Big airplanes need very long runways. Rotorcraft don't need a runway," her mother said with a nod. "Since rotorcraft don't need a lot of space for takeoff and landing, why don't people use rotorcraft more, Mom?" Robin asked.