Selsam multi-rotor wind turbine
Design and innovation do matter. One sees everyone doing things the same way- big supposedly bird-chomping view despoiling wind turbines (note the terminology, eye!) and then the creative genius comes up with a different way of building a turbine that is smaller, cheaper and more effective. A little work on the aesthetics and TreeHugger looks forward to turbine farms that you can barely see from the next county. It appears that by using a lot of smaller turbines the engineering becomes much more manageable and the resistance caused by the size and weight of the components is reduced significantly. TreeHugger really liked the creativity of their analysis of the benefits of multiple units versus single units:
How many wheels does your car have?
Not just one? What about trucks?
How many cylinders in your engine?
More cylinders run smoother - and have more surface area per unit mass.
How many cars in a train? Not just one? Why?
It's much easier on the track. Economy of scale - repeating units...
How many sails on a clipper ship? Not just one? Why not?
How many tiles around your bathtub? Not just one huge thick tile? Better surface to volume ratio with multiple small tiles? Just checking...
How many tiles on your roof? Not just one big, thick tile? Better surface area to mass ratio with multiple smaller, thinner tiles? I see.
Why do we look up and see a flock of geese, rather than just one giant goose? (run!) Why do ostriches and all other birds over a certain size have to walk everywhere?
How many engines on a large airplane? How many props? Why not just one big prop?
How many loops of wire in a generator? Not just one? Why not? More power?
How many fingers do you have? How many Toes? How many teeth?
How many leaves on a plant?
Now how many rotors should a wind turbine have?