Originally Posted by RONALDO_UK
Returning to the original question - with same motor/ same prop and 2S or 3S batteries supplying the same power, what is the difference with the 2S where the prop is (presumably) turning slower?
As I said earlier but obviously didn't explain well enough for you to understand, it doesn't work like that. With the same motor and same prop the 3S battery will be trying to turn the prop a lot faster and because of that will draw a lot more current. Overall the 3S setup would be running at more than DOUBLE the power of the 2S setup.