HeyBub wrote:
XR650L_Dave wrote:
On Jul 23, 4:56 pm, "Bob-tx" wrote:
I was shopping for a ceiling fan at a light store (not a big box no
nothing store), and was told by the salesman that a three bladed fan
pushed more air than a four or five bladed fan. Didn't make sense
to me so I asked why that was and was told he didn't know why, but
that is the way it is. I asked if a two bladed fan pushed even more
air, but he didn't know and of course didn't have any. I bit my
tongue and didn't ask about a one bladed fan.

I didn't buy anything yet.

Is it true that a three bladed fan pushed more air than a four or
five bladed fan, and if so, WHY???

I sure would appreciate any info you guys in the know can offer.

Bob-tx
3 blades is most efficient for wind turbines (electricity windmills),
same might be true for fans.


And twenty blades is most efficient, or at least the most quiet, for nuclear
submarines. Go figure.


Multi blade is definitely not the most efficient. The overriding design
criteria in a sub is stealth.