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General RC Heli Discussion Discuss general topics on rotary wing aircraft, including construction, Servo's, Gryo's and Stabilizer discussions.
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Topic Review (Newest First)
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| 06-28-2013 10:40 AM | ||
| MarcV |
Re: Rx battery question / calculation I enclose a discharge curve from a 3S LiPo at 1C, which is what we typically see on the battery tests that I do. I discharged the battery to 3.3V/cell on our company's UBA5. You can see from the fast drop at the end that the battery is almost fully discharged. By almost I mean that there's enough energy left to dead stick your plane or auto your heli, but that's it. The load was then turned off, but the battery voltage was still recorded and it recovered to 10.3V (3.43V/cell). So this shows that a battery that's fully discharged can have a OCV (open circuit voltage) of 3.43V per cell. I make battery test equipment for a living. I welcome comments or questions. Marc Venis, P.Eng. President Vencon Technologies Inc. www.vencon.com |
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| 06-28-2013 09:38 AM | ||
| craneman32 |
Re: Rx battery question / calculation But who ever goes to the field with a dead battery? Lol |
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| 06-27-2013 11:26 PM | ||
| Midair |
Re: Rx battery question / calculation Quote:
Peter |
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| 06-22-2013 03:17 PM | ||
| MarcV |
Re: Rx battery question / calculation Quote:
I wouldn't fly with a lipo battery at less then 30 to 40%, i.e. 3.8V per cell. Marc |
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| 06-19-2013 05:58 AM | ||
| hifly2104 |
Re: Rx battery question / calculation if you really want to know add one of these to your flight bag . Easiest and safest way I know of finding condition and volts. Even gives a %. does all different batteries . http://www.rotorquest.com/product_in...ducts_id=12588 |
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| 06-18-2013 09:48 PM | ||
| ve7nly |
Re: Rx battery question / calculation I use a 2S 1800 mAH pack with HV electronics and I easily get 6 flights out that. When I recharge it I usually only put about 700 mAH back into it. |
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| 06-18-2013 08:47 PM | ||
| craneman32 |
Re: Rx battery question / calculation I get about 7 flights on my 2s 2000mah before I even worry about checking it. |
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| 06-18-2013 07:07 PM | ||
| Midair |
Re: Rx battery question / calculation If you have a means to check the voltage of the individual cells of the batt, (a simple battery checker, inexpensive) , you should be good to 3.3 volts per cell. Just keep checking it before and after each flight and as the 3.3 volt threshold approaches, take note of how many flights you flew or how long the RX was on and use that as your guide. Peter |
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| 06-18-2013 05:35 PM | ||
| manpole |
Re: Rx battery question / calculation Fully charge, do 2 flights. Recharge with a good charger that shows mah delivered... You should safely get 4-5 flights on 1000 mah |
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| 06-18-2013 03:48 PM | ||
| Kward |
Rx battery question / calculation Hey guys, how do I find out how many Flights I can get on my Jr Vibe 50 nitro With a 7.4v 2s 2000 mAh rx battery ? I'm taking A guess here but 3 flights to be on safe side? was it dont let a lipo battery drop over 30 percent? |
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