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Gearing using prime numbers
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Gearing using prime numbers
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If you want to get most out your model, you may need some very specific gearing ratio's. In order to get those exactly, you need to be able to make gear ratio's of certain prime numbers (1, 2, 3, 5, 7, 11, 13, ...). It is rather straight forward to make gear ratio's involving 2, 3 and 5, but other prime numbers are less straight forward. This may help you.

The essential trick is to use the differential as an addition-component to make the prime number you need (eg: 11 = 2*3 + 5). Below there are some examples.



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 I like it 
Ape Fight
  October 2, 2012
Aagh - maths!! But clever nonetheless. 4 smilies
  
By Jos Westend
Add to my favorite builders

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Added September 27, 2012
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