spy thanks for your input.... I was thinking earlier about transport....some of those big rigs create a great amount of wind...travelling along over 100kph... so what if the first rig was ???? whatever power source...but it had a wind generator thingy attached, which then powered a trailer, and the trailer had the same, which powered another trailer... or better still...apply the above to a train....which can carry up to 100 trailers on a dedicated line,,, and that idea , if feasible, would apply to freight and passenger trains....