The practically instant success of the King Air 200 instigated the creation of its successor, the King Air 300. Equipped with more powerful engines, the King Air 300 reaches up to 1,800 miles and travels at 290 mph. Like the King Air 200, the 300 can seat up to seven passengers, has an enclosable potty, and an interior cabin of 4.9W x 4.8H x 16.7L. The upgrade to the King Air 300 is rightfully known as the King Air 350. Improvements are the lengthening of the fuselage by almost three feet, the addition of the winglets, and the range of up to 2,182 miles. The King Air 350 can seat up to nine passengers, has an enclosable potty seat, and an interior of 4.5W x 19.5L x 4.8H.