People in the wind turbine game are the aviation nuts of decades past. Like building airplanes, building turbines requires a love of design, an inventor's turn of mind, and an instinct for the passage of air over a wing. Who can look at the videos below and not recall crackling sepia footage of the early-model planes ‒ the midwing, the tandem propeller, the monoplane? Most of these designs were destined never to get airborne. Will any of these turbines succeed in the brave new world of wind-generated power?