Powerhouse Thinair single-blade turbine
Now you know there can be a bladeless turbine, but what about a turbine with only one blade? New Zealand's Powerhouse Wind not only proves that a turbine can work with just one blade, but also that such a design can be cheaper and quieter than conventional multi-blade designs.
Since much of the noise from spinning turbine blades comes from the tips and trailing edges, having only one blade automatically reduces noise. Fewer blades also mean more durability. The turbine is geared more toward domestic-scale production, and because of its one-blade design, it’s more affordable for the average consumer. (Co-founder Bill Currie stands by his product in this photo.)