What determines the number of blades on a fan ?

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Offline neilep

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What determines the number of blades on a fan ?
« on: 17/11/2004 23:04:34 »
Hello lovely science experts.

I'm nice and warm now because I just had my electric fan blast me with electric heat, shame but I had no marshmallows !!..anyway...as I turned it off and the fan came to halt I thought to myself what is the law that governs the number of blades on a fan ? be it a cylindrical barrel type or a traditional rotary type fan......does the angle of the blades have an effect on the number required, as well as size etc ?...is there a formula that is particular to this ?

Your aerated cyclonic draughty answers will be most appreciated....and what ever happens, you know I'm your number one fan...(oh gawwwwd !!!!)

'Men are the same as women...just inside out !'
« Last Edit: 17/11/2004 23:26:21 by neilep »
Men are the same as women, just inside out !

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Offline Ultima

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Re: What determines the number of blades on a fan ?
« Reply #1 on: 18/11/2004 00:15:17 »
There is a mathsy thing to explain it [:D] an engineer friend of mine did it as a research project.... but i have no idea LOL

wOw the world spins?
« Last Edit: 18/11/2004 00:23:19 by Ultima »
wOw the world spins?

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Offline bezoar

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Re: What determines the number of blades on a fan ?
« Reply #2 on: 22/11/2004 06:20:43 »
Here's a site with frequently asked questions about ceiling fans that might satisfy your curiosity.
http://www.fancofan.com/faq/faq.htm#Will%20a%205-blade%20fan%20circulate%20more%20air
 

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Offline neilep

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Re: What determines the number of blades on a fan ?
« Reply #3 on: 22/11/2004 11:55:51 »
Thanks Matt, you've been a great help *smirk*.

YAAYY...Nursey's link is 'cooooool'   thanks Nursey !!

'Men are the same as women...just inside out !'
Men are the same as women, just inside out !