Hello We have a wind generator on the farm, three blade with a fairly large generator housing. My father in law moved on to the place in the 70's, and it has spun,but done no work. A close examination with binoculars reveals the name "JACOBS" on the tail, it is on a 48 foot tower, so that is as close as it has been examined. Anybody have any info on one of these? It really bothers me to see it spin when it could do some work. thanks for your input Paul.