Knuckle Quad Battery Question

[Justin]

I want to use a 2200 mAh battery with the Knuckle Quad. I am going to use the Park300 1380 kv Turnigy brushless motors and the 15 amp Turnigy ESCs. Which C rating on the 2200 mAh battery is recommended for this setup?

 

[Mustang7302]

1C = 2.2A on a 2200mAh battery.
4 x 15A = 60A
60A / 2.2A = 27C

If your power setup pulls the 15 amp rating per ESC, you'd want at least a 30C battery to provide enough current. But since you rarely, and only briefly when you do, run wide open throttle on a multicopter you don't need to worry about the high end of the limits. Not to mention your ESCs should be rated for 120% of your motor/prop combination will ask for.

Short story is that any 25C battery will do fine for your Knuckle build.

 

[Justin]

Thank you mustang7302. The motor asks for 10 amps and that is why I've got 15 amp ESCs on it. I see your math and it seems like I need 27Cs. Do I get a 25C or a 30C battery? This is my first multirotor (forgot to mention that). I want the best efficiency, but good performance.

 

[Mustang7302]

Since you're not going to be pulling 15A the entire flight, probably only 4 to 5 per motor ... The 25C battery is fine.

 

[Justin]

thanks!