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Mechanical Engineering
Question about calculation of planetary gear ratios
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[QUOTE="CWatters, post: 5855123, member: 423469"] I think this is correct.. Let Nr, Np, Ns be the number of teeth on the ring, planet and sun gears. For each turn of the ring the planets rotate (about their fixed centre) Nr/Np times. For each turn of the planets the sun rotates Np/Ns So for each turn of the ring the sun turns: (Nr/Np) * (Np/Ns) = Nr/Ns [ATTACH=full]212364[/ATTACH] Edit: In case it's not obvious, these two set ups are equivalent (except for the direction of rotation). [ATTACH=full]212368[/ATTACH] [/QUOTE]
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Question about calculation of planetary gear ratios
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