I have heard tales of folk touring by Windcheetah in Canada (or perhaps Australia, my memory fails me) adding a sail on the long boring bits. Possibly more controllable was the strimmer motor another guy added to his WIndcheetah to power him at a steady 30mph on the flat of the Prairies (this is for real, I met the guy, who used to work for Bob Dixon at AVD, and saw the very machine) :?: