This is the lowest gear ratio attainable with an epicyclic gear train.
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Use of Wilson's epicyclic steering gear meant that only a single driver was needed.
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The cause of the accident was attributed to the catastrophic failure of the Main Rotor Gearbox as a result of a fatigue fracture of a second stage planet gear in the epicyclic module.
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Epicyclic gearing or planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear.
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The gear ratio in an epicyclic gearing system is somewhat non-intuitive, particularly because there are several ways in which an input rotation can be converted into an output rotation.
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Epicyclic gearing systems also incorporate the use of an outer ring gear or annulus, which meshes with the planet gears.
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During World War II, a special variation of epicyclic gearing was developed for portable radar gear, where a very high reduction ratio in a small package was needed.
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Epicyclic gearing is a system consisting of outer gears, typically mounted on a movable arm, rotating about a central gear.