windjammer
n.— «Many of these farms never even had electricity until the mid to late 30’s. And even those that did often had an onsight “windjammer” that produced very small voltage from which the juice was run into the buildings often on bare wires and only for dim low wattage light bulbs. If the wind didn’t blow, there was no electric power for them either.» —“learning about old cows” by ontic Ask MetaFilter May 3, 2007. (source: Double-Tongued Dictionary)