I am trying to get a waving effect for a flag in my animation I am working on. However when I click alt a the cloth fabric just hangs there not being affected at all by the wind. I have wind power at 163 and it is aimed right at the flag yet it still does not work. http://www.pasteall.org/blend/27552 is the link to the file.
I am not sure what exactly the problem is but this is my guess. You need to decrease the mass of the flag. By default it is quite heavy.
I've found that the cloth seems to need to "drop" completely before it will be affected by the wind. I tried a plane hanging from the top edge and because it was already in the "dropped" position it animated straight away with a wind force of 2000 to 9000 it flapped nicely, 10000 made it go nuts. I tried with a cloak next, much more complex, and after pinning it, it took 100 frames before I got some ripples with a wind force of 9000
I had a similar problem, and my flag started to react to the wind force once I scaled it up 10 times.
The bigger the flag was (in Blender Units) the more it reacted to the wind force.
Check your scale!
Also check Falloff power
(my problem was: too low
strength and too big