On Wed, 2003-07-16 at 19:57, Lorne wrote: > On Wednesday 16 July 2003 09:04 am, Lyvim Xaphir wrote: > > On Wed, 2003-07-16 at 09:59, Lorne wrote: > > > On Tuesday 15 July 2003 12:11 pm, Lyvim Xaphir wrote: > > > > The Areoflows have bearingless fans which are some of the quietest in > > > > the industry, and ultimately reliable because they are, well, > > > > bearingless. > > > > > > If you are referring to the old bushing fans, there is no way they are > > > more "reliable". They simply do not last. A sealed bearing will last for > > > years and years. A bushing fan might last 3, but usually 18-24 months is > > > all they can handle. > > > > > > I'm currently running some sealed bearing fans that are actually much > > > quieter than the old "bearingless" fans by a factor of 3. > > > > This is not the same thing. This is new bearingless technology. It > > utilizes something called a magnetic tip. My understanding is that the > > fan blade is suspended by a magnetic field. > > > Really. Interesting. Must be one heck of a magnet to handle the torque and > thrust of the fan eh?
Just a thought here. But if you think about it torque and thrust for the spinning fan (assuming a constant speed) will be almost 0. If of course it is properly balanced. In such a case it will operate just like a gyro. (All the weight of the blades on the ends etc.) As long as it is constantly in a single plane of operation torque and thrust are negligible. Also like a gyro it would heavily resist any attempt to move it off of it's plane of operation. James
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