6
$\begingroup$

Why do wind power plants have just 3 blades? It seems that adding more blades would increase the area that interacts with the wind and gather more energy.

enter image description here

(Image from Wikipedia.)

$\endgroup$
3
  • $\begingroup$ Short answer by (same) Wikipedia: 3-bladed turbines have high tip speeds of over 320 km/h (200 mph), high efficiency, and low torque ripple, which contribute to good reliability $\endgroup$ Commented May 13, 2013 at 12:49
  • $\begingroup$ I'm pretty sure I've seen 2-bladed ones as well. $\endgroup$
    – Řídící
    Commented May 13, 2013 at 13:07
  • 2
    $\begingroup$ Also see Wikipedia: Blade count. $\endgroup$
    – Řídící
    Commented May 13, 2013 at 13:09

1 Answer 1

5
$\begingroup$

It is just easier, i.e. less expensive, to build and maintain them that way. There exist alternative designs that are more efficient but also more difficult (= more expensive) to build, put up and maintain. You can check those out via this link.

$\endgroup$
1
  • 2
    $\begingroup$ why down-vote? so this isn't correct? $\endgroup$
    – seb
    Commented May 13, 2013 at 14:57

Not the answer you're looking for? Browse other questions tagged or ask your own question.