Why are the fan blades uneven?

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Why are the fan blades uneven?

#15

07-07-2011, 03:21 PM

tangofox007 tangofox007 is offline

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Quote:

Originally Posted by lutzTD

take an 8 blade fan, it will generate frequencies at multiples of 8, 4, 2, and 1

a 12 blade fan will generate frequencies at multiples of 12, 6, 4, 2, 3, 1

Why does it matter that the multiples are whole numbers versus fractional? Is a 12 blade fan going to be louder than an otherwise identical 11 or 13 blade fan?

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