Ops! I assumed that one of the ratios would be (1+ring/sun) but that's only if you anchor the ring! Sorry, it's been a while since I've thought about this stuff (that's why I have no references for you).
I guess I should be more thorough for accuracy-- that way I know I'm not making any more...
ops! I think I mispoke about the negative... what I meant was that one ratio is negative and one is positive
I think the ratios would be
-(1+ring/sun1)
ring/sun2
Also, the planets do not need to have the same number of teeth-- the ratios are still valid.
Woohoo! My fist forum post anywhere!
Sorry, to answer your question, the ratio of the ravigneaux would be just (ring/sun) and also negative (-ring/sun).
Hope that helps
