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  2. Magnus effect - Wikipedia

    en.wikipedia.org/wiki/Magnus_effect

    The Magnus effect is a phenomenon that occurs when a spinning object is moving through a fluid or gas (air). A lift force acts on the spinning object and its path may be deflected in a manner not present when it is not spinning. The strength and direction of the Magnus effect is dependent on the speed and direction of the rotation of the object.

  3. Rotation around a fixed axis - Wikipedia

    en.wikipedia.org/wiki/Rotation_around_a_fixed_axis

    Rotation around a fixed axis or axial rotation is a special case of rotational motion around an axis of rotation fixed, stationary, or static in three-dimensional space.This type of motion excludes the possibility of the instantaneous axis of rotation changing its orientation and cannot describe such phenomena as wobbling or precession.

  4. Aerotrim - Wikipedia

    en.wikipedia.org/wiki/Aerotrim

    Human strength is required to direct the motions by shifting the rider's body, and, as such, the Aerotrim does not cause dizziness or nausea if it is controlled by the rider themselves. During a forward or backward spin, command of the machine becomes limited, but it is still possible to flip out of a spinning loop and translate the momentum ...

  5. Rotating unbalance - Wikipedia

    en.wikipedia.org/wiki/Rotating_unbalance

    In rotation an unbalance when the mass/inertia axis does not intersect with shaft axis then it is called dynamic balance. Combination of static and couple balance is dynamic unbalance. It occurs in virtually all rotors and is the most common kind of unbalance. It can be fixed by correcting the weight on at least two planes. [5]

  6. Orientation entanglement - Wikipedia

    en.wikipedia.org/wiki/Orientation_entanglement

    It returns to its original configuration after spinning a full 720 degrees. In mathematics and physics , the notion of orientation entanglement is sometimes [ 1 ] used to develop intuition relating to the geometry of spinors or alternatively as a concrete realization of the failure of the special orthogonal groups to be simply connected .

  7. Balancing of rotating masses - Wikipedia

    en.wikipedia.org/wiki/Balancing_of_rotating_masses

    This is called one-plane dynamic balancing. If the object is cylinder or rod-like, it may be preferable to execute two-plane balancing, which holds one end's spin axis steady, while the other end's vibration is reduced. Then the near end is freed to vibrate, while the far end spin axis is fixed, and vibration is again reduced.

  8. Von Kármán swirling flow - Wikipedia

    en.wikipedia.org/wiki/Von_Kármán_swirling_flow

    Von Kármán swirling flow is a flow created by a uniformly rotating infinitely long plane disk, named after Theodore von Kármán who solved the problem in 1921. [1] The rotating disk acts as a fluid pump and is used as a model for centrifugal fans or compressors.

  9. Geometrical frustration - Wikipedia

    en.wikipedia.org/wiki/Geometrical_frustration

    Trying to propagate in the long range a packing of these pentagons sharing edges (atomic bonds) and vertices (atoms) is impossible. This is due to the impossibility of tiling a plane with regular pentagons, simply because the pentagon vertex angle does not divide 2 π. Three such pentagons can easily fit at a common vertex, but a gap remains ...

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