Why aren't fans square or rectangular, only circular?
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Because, a fan rotates about it’s center. A circle is uniform and all other shapes are non-uniform.
A non-uniform shape easily gets unstable at higher velocities due to uneven distribution of mass.
Even if you try to keep a quadrilateral frame, your rotor should be circular to be stable. Disturbances get amplified very easily in uneven shaped fans.
Imagine drinking coffee on a moving car with square shaped tyres. I hope you will not have a smooth ride.
A non-uniform shape easily gets unstable at higher velocities due to uneven distribution of mass.
Even if you try to keep a quadrilateral frame, your rotor should be circular to be stable. Disturbances get amplified very easily in uneven shaped fans.
Imagine drinking coffee on a moving car with square shaped tyres. I hope you will not have a smooth ride.
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Fans are not in the shape of square or rectangle because, a fan rotates about it’s center. A circle is uniform and all other shapes are non-uniform.
A non-uniform shape easily gets unstable at higher velocities due to uneven distribution of mass.
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