Thanks for the response.
What I was looking at was a way to reduce battery weight by choosing a higher voltage pack with a smaller mah. If you look at what is currently used for large ships swing the 12 - 13" diameter props they run 5S1P 2700 mah packs or 4S1P 4000mah packs. The 5S packs are about 1 - 1.25 oz lighter than the 4S. They both would run the same rpm set point in the ESC
but the 5S pulls less current and thus the 2700 pack vs the 4000.
My point being could we push the voltage to 6S 22.2 V and say 2000 mah ish and save more weight (assuming you could find the a pack that did in fact weigh less then the 5S for the capacity needed to do the pattern) while running at the same rpm set point or does the motor have limits?
I am no expert but what you say may work. However I am quite sure that the same motor will not work in all cases. You have to match the KV ratting of the motor to the number of cells in the pack. I suspect in the end their isn't a lot of weight savings because the total weight of the battery = the available energy. Doesn't matter if it is high voltage or high current. The weight advantage of HV might be in smaller wire and smaller speed controller. But as I say what do I know.