Quote:
Originally Posted by planeflyer94
i have the grayson supersonic combo,and a 1300 20c 3cell.

Based on my tests with a 22126, at WOT with a 6x4 we were drawing 21 amps.
For a 1300 20c 3cell, I believe the calculation (1300 x 20) shows that the battery can deliver 26 amps. I think this is fine based on what I have read. You should be using a battery that can deliver approx 25% more amps than what the setup pulls. So, 21 amps + 25% = approx 26amps...which is about where you are.
Keep in mind that if your system is only pulling 21amps at WOT, you probably wouldn't see a performance increase by moving up to a much higher C rating battery. You are only going to pull approx 21 amps whether you have a 20, 25, 30 or 40c battery.
You might want to consider a higher capacity battery (mah). A higher capacity battery at the same c rating would give you longer flights plus more power potential. Check out these calculations:
3s 1300mah, 20c = 26amp potential
3s 1300mah, 25c = 32.5amp potential
3s 1550mah, 20c = 31amp potential (and longer flight times over a 1300mah)
3s 2200mah, 20c = 44amp potential (and longer flight times over a 1300mah)
For what it is worth, I am running 1550mah 30c batteries and my buddy is running 2200mah 20c batteries. So, this airframe can certainly handle larger, heavier batteries.
hope that helps
Rob