Tilt-rotors are advanced aircraft that combine the vertical takeoff and landing capabilities of a helicopter with the speed and range of an airplane. They have large rotors that can tilt from a vertical position for takeoff and landing to a horizontal position for forward flight. This unique design allows them to operate in various environments, making them versatile for military and civilian use. One of the most well-known tilt-rotor aircraft is the Bell Boeing V-22 Osprey, which is used by the U.S. military for troop transport and logistics. Tilt-rotors can reach higher speeds than traditional helicopters, making them efficient for long-distance travel while still being able to hover and land in tight spaces.