Help! Choosing a battery for twin electric Rc plane

[Dawson]

So I’m building a huge twin engine electric Rc plane. The motors I am using are the flite test monster Motors in their store (510kv). I’m using two ESC’s (80A, 2-6s LiPo). I’m looking for a singular battery that can support power for both engines rather than using a battery for each engine. The plane is already pretty heavy so turning two batteries into one would be awesome. I’d like some power so I’m looking for a 6s but wasn’t sure If there was a specific C or mAh rating that it has to be in order to work. I’m also using 14x8 props but not sure if that’s necessary for battery choice.

Thank you!

 

[Shurik-1960]

The battery is selected depending on the optimal CG and the location of the battery. Battery power depends on consumption: a wattmeter measures the maximum current of one motor and multiplies it by the number of motors. Your question does not make sense - a lot of data is needed for the model: the planned flight weight of the model, the maximum current with your propeller, the working thrust of the engine, the installation location of the battery and its weight to get to the optimal CG, the planned flight time...

 

[To_many_planes]

So I’m building a huge twin engine electric Rc plane. The motors I am using are the flite test monster Motors in their store (510kv). I’m using two ESC’s (80A, 2-6s LiPo). I’m looking for a singular battery that can support power for both engines rather than using a battery for each engine. The plane is already pretty heavy so turning two batteries into one would be awesome. I’d like some power so I’m looking for a 6s but wasn’t sure If there was a specific C or mAh rating that it has to be in order to work. I’m also using 14x8 props but not sure if that’s necessary for battery choice.

Thank you!

I would go with a 6s 2200 but with no data.

 

[Shurik-1960]

I'll take a lot of popcorn and wait for Dawson to build his huge plane and be able to answer at least some of my questions.

 

[Foamforce]

Consider two 3s batteries connected together in serial to make 6s. This is commonly used and has a couple advantages. The first is that if you already have matching 3s batteries, you don’t need to buy an expensive new 6s battery. I use this for a couple of my bigger planes. Secondly, you can sometimes arrange two smaller batteries more easily than one large one.

Weight wise, there’s not a huge difference. Two 3s 2200s have the same cell weight as one 6s 2200 and the wrapping around batteries is very minimal, so the only real difference is the weight of one extra power lead and balance cable.

PS, the two batteries would plug into the serial cable and then power both motors from there.

 

[quorneng]

It looks like the 510kV Monster motor can run at 1500W continuous so with two it means 3000W will have to come out of the battery.
Even with a 6s that means 120A so a figure within the capability of your ESCs. However even for a 6000mAh battery that means a 20C (3 minute) discharge rate at full power.
I hope you not going to need anything like the maximum power of the 510kV Monster motor.
If you actually do need all the power then your huge plane is likely to have to be able carry an even bigger & heavier battery!

Just how huge and heavy is your plane at the moment without any battery?