you are viewing a single comment's thread
view the rest of the comments
[–] 10 points 2 years ago

There's one extra-rotation from an external perspective due to the revolution of one around the other. So the formula is r1 / r2 + 1.

This extra-rotation doesn't appear from the point of view of the circles, or if you consider the circles as two stationary gears

  • source
  • parent