We have a very old theory on this
http://library.tarvalon.net/index.php?title=Ages_of_the_Wheel_Theory
It has spoilers, up to book four, but probably nothing major
The Age of Legends was a mixture of science and the One Power, so Jo-wings would be like our airplanes, but non polluting. It isn't clear if they would run directly off the power, or if the power could be used to create an energy source, or some other alternative. There are hints, especially in...