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2. Epicyclic gearing - Wikipedia

   en.wikipedia.org/wiki/Epicyclic_gearing

   This planetary gear train consists of a sun gear (yellow), planet gears (blue) and carrier (green) inside a ring gear (red) An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun").

3. Sun and planet gear - Wikipedia

   en.wikipedia.org/wiki/Sun_and_planet_gear

   The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the connecting rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a second rotating cog fixed to the drive shaft, thus ...

4. File:Animation of the planetary system around Sun-like star ...

   en.wikipedia.org/wiki/File:Animation_of_the...

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5. Ravigneaux planetary gearset - Wikipedia

   en.wikipedia.org/wiki/Ravigneaux_planetary_gearset

   The Ravigneaux gearset is a double planetary gear set, invented by Pol Ravigneaux, who filed a patent application on July 28, 1949, in Neuilly-sur-Seine France. [1] This planetary gear set, commonly used in automatic transmissions, is constructed from two gear pairs, ring–planet and planet–planet. The gearset provides four forward gear ...

6. File:Planetary gear set schematic.svg - Wikipedia

   en.wikipedia.org/wiki/File:Planetary_gear_set...

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7. File:Planetary gear set schematic fixed carrier.svg - Wikipedia

   en.wikipedia.org/wiki/File:Planetary_gear_set...

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8. Tusi couple - Wikipedia

   en.wikipedia.org/wiki/Tusi_couple

   A (red) idler gear on the arm meshes with the fixed gear. A third (green) gear meshes with the idler. The third gear has half the number of teeth of the fixed gear. An (orange) arm is fixed to the third gear. If the length of the arm equals the distance between the fixed and outer gears = d, the arm will describe a straight line of throw = 2d.

9. Sturmey-Archer - Wikipedia

   en.wikipedia.org/wiki/Sturmey-Archer

   All Sturmey-Archer gear hubs use epicyclic (planetary) geartrains of varying complexity. The AW is the simplest, using one set of planetary gears with four planets. The AM uses three compound planets with differently sized cogs machined from a common shaft to engage the gear ring and sun gear separately, while the close-ratio three-speeds, and hubs with four or more speeds, use multiple ...