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LECTROFLYER
12-22-2005, 04:59 AM
ok I gotta mega /3 with a small prop and want to use 3s 1320 so itll fit in the model easier , the motor pulls 23A and the lipos are rated at 16C/20C burst, at wot is this gonna fry the battery?? or should I stay with 3s 2100 at 15C

watt_the?!
12-22-2005, 05:27 AM
yes it will fry the battery.

stay with the 2100.

Twmaster
12-23-2005, 01:50 AM
Use the 2100 pack as Watt said.

Here is a simple way to look at this. We'll use the 1320mA battery as an example. 1C = the capacity of the battery. In this example 1C = 1320mA or 1.32A 16C = 21,120mA or 21.12A so the 23A your motor draws is too much.

watt_the?!
12-23-2005, 01:55 AM
you could prop it down via the prop size or throttle limit to go no higher than 16A as an alternative.

tim.

LECTROFLYER
12-23-2005, 04:17 PM
thanx , Im aware of figuring out the C rating just concerned how far I coud push it, so I take it a wattmeter would help right?

Rugar
12-23-2005, 04:22 PM
thanx , Im aware of figuring out the C rating just concerned how far I coud push it, so I take it a wattmeter would help right?

A Watt Meter is one of the best investments that you could make for this hobby. It will save you lots of money in the long run by keeping your amps draws within specs of all your components. Just one fried battery or one smoked ESC, and your Watt Meter would have paid for itself.

LECTROFLYER
12-30-2005, 11:35 PM
thanx for the replys........... just bought 2 3s 1320 pax so will wind up using them with a A/F 010 as you know this motor draws less than 1/2 the amps so should be a darn good match, Im finding out the 1320 seems to be a popular size which probibly explains why thier so pricy

hoppy
01-01-2006, 05:31 PM
In some cases, C ratings are ah, open to interpretation shall we say. The rating on the pack may be 'continuous duty', '10 sec burst', or some other undefined number. You'll have to check out the battery tests run by everydayflyer and RD Blakeslee for example to get a better grip on how the packs will actually perform. Some brands do better than others on rating their cells and defining what the rating means. Personally, I like to use them very conservatively....70% or less of rated continuous current capability.

Bone
01-02-2006, 05:00 PM
You might consider a clamp meter also.More convenient to use than a Wattmeter,although it doesn't offer as much information.

bhchan
03-05-2006, 07:12 AM
The Static amp is much higher than the flying amp. When the plane is moving , the current will drop somewhat, about 10%-15%. In general, I would not push the Lipo to the limit.

Brian, an EAJ

LECTROPILOT
03-05-2006, 03:14 PM
thanx for the replys.........I was aware of the unloading factor and it would make sense BTW I hate to be contradictive but I ran that 3s 1320 with the mega/3 and it held up being a 20A burst which would be 26A burst, but just went wot for about 15 sec. infact it was going so fast the wing folded so the model is a total loss, even broke the shaft, only thing that survived was the CC esc

midoco
06-20-2006, 08:20 PM
I really like the Dualsky batteries. I have been pushing their 20c batteries really hard. I bet their 1500's would be perfect.

Bill G
06-23-2006, 05:32 AM
ok I gotta mega /3 with a small prop and want to use 3s 1320 so itll fit in the model easier , the motor pulls 23A and the lipos are rated at 16C/20C burst, at wot is this gonna fry the battery?? or should I stay with 3s 2100 at 15C

Like all lipos, forget their nonsense ratings and go with real world user's results. If its a TP 3s-1320, I've found that they will ouput a good 13.5A continuous, or a TRUE 10C. That's about it. Still pretty good, but not quite what the label would indicate.

WOULD SOMBODY PLEASE START A NEW THREAD. I'M TIRED OF LOOKING AT MY NAME AND THIS POST, AS THE LATEST POST, DAY AFTER DAY, IN THIS FORUM:eek: