This is an Aerocycle sail bike. From what I've found it was built by Patterson engineering in Connecticut. Less than 400 were produced in 1974. I have an all original one in very good condition with the original sail and mast. I've had it for a while, and now I am considering letting it go. If there is any real interest I will dig it out and take photos. I was told the last one to surface was sold at the Copake auction a few years ago, but I cannot confirm that. The photos attached are from the web and are not the actual bike I have. Feel free to pm me with any questions.