Originally Posted by pvogel
Quite simply, increasing voltage and keeping the same basic power means that you decrease amp draw. Since increasing current increases resistance decreasing current decreases resistance and so you wind up with a more efficient power system. Yes, it'll be heavier, but you'll also decrease your current draw by 25% or so -- sticking with 2200 mAh you'll extend your flight time by about 25%, you could also drop to a smaller pack (say, 1800mAh) and perhaps come in at nearly the same weight as the 3S 2200 pack resulting in the same or slightly longer flight times as you were getting with the 3S setup.
Resistance is constant in a DC circuit, no? I think I understand what you mean though. I'm kinda embarassed I don't know this stuff. (I'm an electrician, but we very rarely
deal with batteries and their ratings.
Originally Posted by Bigster
What plane, and what type of flying? If you're into 3D, you may benefit more from a bigger prop (more prop wash) than you would with 4S.
A rule of thumb I heard was that when you hit about 5x the voltage in amps, it's time to add a cell.
Edit: I see it's probably the 48" Edge
Yeah, it's a $1.5.
I plan to do 3D with it, and I do a bit already, if 15-20 second hovers and harriers count.
The wind hasn't been cooperative for any flatspins or the like, so I haven't been doing too much in that category.
I see myself possibly getting something in the 60" range in the near future, thus my curiosity about the 4S swap. It would be nice to have everything running on the same pack.