This airplane is powered by two piston engines, usually mounted on the wings. Twins are usually faster than singles, with flying speeds of 180 to 275 mph and a range that is comparable to the piston single. Passenger capacity is normally four to nine people. The heavier piston twins often have a separate passenger section and are referred to as cabin-class twins. They can fly at speeds of 250 to 300 mph and carry up to 10 passengers.