LDM

My Feedback: (15)

can I use the below battery based on the specs at the bottom of this post
Thanks

Capacity: 2200mAh
Constant discharge: 20C
Burst rate: 30C (15sec)
Configuration : 4S 14.8v
Pack size: 113x34x33
Weight : 247g

can I use the above battery with the following plane/specs


Motor: 2 x 30-XX Brushless outrunner 3900kv
ESC: 2x20A
Duct fan: 2 X 75mm


Required:

11.1V 2200mah 3S 25C Lipo

jdetray

The answer is probably NO. If the motor and ESCs are rated for 3S and you attempt to use 4S, you are usually asking for trouble.

You will get better answers if you post the exact EDF units and ESCs you wish to use. Then there is a chance that someone having direct experience with those components will be able to help you.

- Jeff

LDM

My Feedback: (15)

Thanks Jeff , the plane just arrived but the motors and ecs are no names , this is more info
The A-10 Fighter jet comes 97% pre-built and includes a powerful twin 20A (40A Total) brushless electric ducted fan system plus steerable nose wheel.
Scale model enthusiests will notice the engines to be larger than the real life model, this model is designed this way to increase acceleration performance without increasing Amp load; keeping the battery, esc and motors under 20A in size.
This well detailed jet uses two 75mm ducted fan units to provide fast throttle response and a high top speed.

Spec.
Wing Span : 1017mm
Length : 916mm
Height: 284mm
Wing loading: 59g/dm2
Flying Weight: 970g
Servo: 4x9g
Motor: 2 x 30-XX Brushless outrunner 3900kv
ESC: 2x20A
Duct fan: 2 X 75mm
Battery compartment size: 115x50x40mm

Required:
Your own TX & RX
11.1V 2200mah 3S 25C Lipo

jdetray

So I'm guessing you are talking about this plane:
http://hobbycity.com/hobbyking/store...dproduct=12617

I don't know if you can use a 4S pack without frying something. That would be 33% more than the recommended voltage. To me, that just seems foolish, but perhaps someone else will jump in with more information.

My question is: Why don't you want to use the recommended 3S pack?

- Jeff

LDM

My Feedback: (15)

because I fly mostly fule , e-flight is new to me and I have 3 -4s packs
so I will just buy the appropriate packs .

Walt Thyng

My Feedback: (9)

The ESC is the choke point. Most motors will handle a few more volts than rated by the vendor (they know R/Cers). If the ESC can handle four cells and you can keep the amps in the proper range, you can probably get away with the four cell packs. You may, however, shorten the life of the motors - but it'll be a helluva ride until they die(-:
Walt

LDM

My Feedback: (15)

Thanks Walt , I am going to tinker with it and see what happens

CGCINC

My Feedback: (1)

He he.... I love to tinker!! Doesn't always turn out good but that's how you learn!!