Ultralights are lightweight aircraft that typically weigh less than 254 pounds (115 kg) and are designed for recreational flying. They are often simple in design, with a maximum speed of around 55 knots (63 mph) and a maximum stall speed of 24 knots (28 mph). Ultralights can be powered by small engines or can be unpowered, relying on gliding. These aircraft are popular among aviation enthusiasts due to their affordability and ease of use. Pilots do not need a traditional pilot's license to fly ultralights, but they must adhere to specific regulations set by aviation authorities like the Federal Aviation Administration (FAA) in the United States.