Offset-Bladed fans

[Undertow]

Does anyone know where I could find one of these for case fans, if they even exist? If you're not sure what I mean, it is a fan whose blades are not evenly spaced and specially balanced. Look at the radiator fan inside a Jaguar to see what I mean. These offset-blades prevent a continuous pattern of air flow from happening, thus reducing noise. If you notice, all fans have an odd number of blades, this makes them a bit quieter but there is still a pattern every 3 rotations. So...anyone seen anything like that? The blades would actually look crooked and screwed up.

[Biff]

I have not seen anything like that in the pc cooling world. There are specialty fans that run quieter than the norm, most cooling sites have any number of these listed.

[NDC]

Yeah, I've seen some fans that claim to run quieter, but the trade off is the RPM. http://sysopt.earthweb.com/forum/frown.gif