Fromeco 2600mah battery HELP!

[leepord geko]

Okay you guys have confirmed what I thought and its not like I don't how to set these up, from my knowledge if the voltage of each cell drops below 3.1v per cell the battery should explode, basically as cnb said it shouldn't shut down till 3.6v or something which now leads me back to the radio which is going to be sent off to HH. I doubt the smart fly failed since I haven't heard of one failing yet but maybe min's a first, again the system worked once I turned it on again after the crash.

[crash-n-burn]

	Quote: Originally Posted by leepord geko
	Okay you guys have confirmed what I thought and its not like I don't how to set these up, from my knowledge if the voltage of each cell drops below 3.1v per cell the battery should explode, basically as cnb said it shouldn't shut down till 3.6v or something which now leads me back to the radio which is going to be sent off to HH. I doubt the smart fly failed since I haven't heard of one failing yet but maybe min's a first, again the system worked once I turned it on again after the crash.

In my JR 12X I had the battery pack go bad, it severely reduced range of the radio. I suggest you take the pack out and load test it see what it says you may have a bum transmitter pack. This is a known problem with some JR Radios. Good luck man, go have a beer.

> oh wait your 16 years old, go have a coke or something.

[yakpilot]

I promise this is my last post in reply to any of your threads. Li-ion packs will not explode under any circumstance that I am aware of. Kurt might chime in on this. Li-poly's are different chemistry and can spontaniously combust under certain circumstances. Though I doubt you could get a pack catch fire under the circumstances you discribe.
Again, sorry I was drinking so much Hater-aid earlier.

[leepord geko]

LOL at the beer comment this is what I'm thinking the problem is the transmitter battery, I think it just voltage dropped which caused loss of signal. I'll know once I get it back from HH. yakpilot you can post in my other threads if you want I just like informative information with out all the BS, my other thread said beware, and just check your equipment, that was just a dud receiver for me and thats why I've eliminated the receiver problem and battery problem, and am now down to tx problem so I'm hoping it was just the pack anyways time to get that EXTREME FLIGHT NOW THAT I'VE ALWAYS WANTED! The composition of the cells is different but I've seen a li-ion explode from being majorly overcharged.
but that doesn't matter anyways.

[mstam]

A Li-ion is not gonna explode if under a certain voltage just like that if used for your Rx

Take the batteries out, put a load on it and see what the voltage is. If OK, check your servos, maybe one is RIP and pulling high current.

Also, most Li-ion batteries are not suitable for Rx applications where loads can be over 8A. Use LiPo in stead of very much preferred, A123's. Rock solid.

Ditch the Smartfly and if you want a redundant battery setup, use 2x 2S1P A123 batteries and a Wolverine switch with 2x 16AWG Deans in, one out. Make a short cable with a male Deans on one side and 2x JR plug on the other. Use 22AWG servo wire good for 2x 4A=8A continuous.

Or use a single heavy duty switch like a 6A @120VAC rocker switch or e.g. the Ultra Switch II w/ 2x servo wire in and 2x out to your receiver. See http://www.electrodynam.com/

Good luck!

[mstam]

	Quote: Originally Posted by leepord geko
	LOL at the beer comment this is what I'm thinking the problem is the transmitter battery, I think it just voltage dropped which caused loss of signal. I'll know once I get it back from HH. yakpilot you can post in my other threads if you want I just like informative information with out all the BS, my other thread said beware, and just check your equipment, that was just a dud receiver for me and thats why I've eliminated the receiver problem and battery problem, and am now down to tx problem so I'm hoping it was just the pack anyways time to get that EXTREME FLIGHT NOW THAT I'VE ALWAYS WANTED! The composition of the cells is different but I've seen a li-ion explode from being majorly overcharged. but that doesn't matter anyways.

This setup is working for me for over 350 flights in my EF Extra 300. One single 2300ma A123. The downside is that I can only do 5 15 minute flights max. For the EF Edge 540T I'm gonna go twice the capacity, 4600ma, and power the ignition from the receiver, still good for 8 15 minute flights.

[leepord geko]

My TX battery underload now just said 9.9v so maybe that was it I don't know lol I think I'll go back to glow planes with one switch and a nimh battery

[crash-n-burn]

	Quote: Originally Posted by leepord geko
	My TX battery underload now just said 9.9v so maybe that was it I don't know lol I think I'll go back to glow planes with one switch and a nimh battery

I think that 9.3 volts is the "low volt alarm" limit shortly there after the tx will shut off.

Whats the fully charged voltage of that TX pack ?

Here is a short thread on the DX 7 battery :

http://www.rcgroups.com/forums/showthread.php?t=841127

[flatspinjim]

You could easily go with one 2300 A123 and one Smart-Fly super switch. Really simple and extremely reliable.

[leepord geko]

10.7 volts ya the battery is shot it has like a 0.3v change every time you turn it on so I'm 99% that was the problem but will send back all my stuff to spektrum, and I don't know put the smart fly board in the funtana lol to see if it still works. Thanks FG for the help I think we can close this thread.

[mstam]

	Quote: Originally Posted by flatspinjim
	You could easily go with one 2300 A123 and one Smart-Fly super switch. Really simple and extremely reliable.

See pic above. That's what I use now but gonna go twice the capacity on the next project and power the ignition from the Rx battery. Now I can do 5 15 minute flights w/ only 200ma of charge left, with a 2S2P also powering the ignition 8 15 minute flights with enough juice left.

I like the Ultra Switch II better because Electro Dynamics sells sets where you can balance charge from the receptacle (my idea )

[mstam]

	Quote: Originally Posted by leepord geko
	10.7 volts ya the battery is shot it has like a 0.3v change every time you turn it on so I'm 99% that was the problem but will send back all my stuff to spektrum, and I don't know put the smart fly board in the funtana lol to see if it still works. Thanks FG for the help I think we can close this thread.

9.6 volts is more than fine. I use a 3S1P LiPo w/ 2x 1N4001 diodes to drop the voltage by 1.2 volts. When my Tx reads 9.5 volts I charge the LiPo up to about 2300ma from the 2600mah capacity.

[Dan_nO]

Geko, I see that your 16 years old and havent posted that much here, welcome to FG.

There are lots of guys here with many years of experience, ALL of us learn something new everyday with all of this stuff no matter how old we are as there are so many different pieces of equipment that guys use in combination in their setups. The more equipment that is involved as to electronics, when something happens it at times can complicate things more in pin pointing the cause of a problem.

Im trying to help here if you would allow me to as to some friendly advice....I would like to offer a suggestion as to being careful first with titles of threads, there are many very reputable companies out there and people from those companies do from time to time lurk around in the threads or that are led to these threads from people whom are sponsored by them, they are all willing to help.

You have to realize that you need to be careful what you say and or blame placing fault on a piece of equipment unless you are sure beyond a doubt as to the cause of an accident or failure.

You named this thread what you did, it leads people to believe that there is an issue with Fromeco batteries with this particular plane and setup.

I also see that you started another thread named Spektrum AR7000 Beware! again with this same plane.

You started this thread naming it what you did asking for help yet, in the video that you posted, at the very end of the video, whomever that edited the video placed the blame on Spektrum due to lockout.

How do you know it was a lockout when you stated that after the crash you hooked the batts back up and everything worked fine after that...with them being disconnected its not going to show you anything, it reboots.

Now through discussion here your thinking that its the transmitter battery, has nothing to do with Fromeco.

See what I mean ? You have named Fromeco in this thread yet its starting to look as if Fromeco has nothing to do with this at all.

Yes, we all get agrevated and upset when we loose a plane but, we all need to remember to be careful in what we name things and what we say. Maybe this would have been more appropriate to have been named....Lost my plane today please help ?, then list the equipment you have that was in it, what happened and all the specifics and guys will give you a LOT of different ideas as to stuff to look at and check just as they have here already

I hope that you take this in a good way and not a bad one, I am not trying to slight you at all, just trying to make you aware and trying to give you words of advice to help you along.

[flatspinjim]

Nice post Dan nO!

[Dan_nO]

I seen a young man that is upset because of loosing his airplane, just as I would have. Its easy to speculate and assume, we all know what the word assume means.

Ive many times had something to happen and swear and be darned that it was the reason, but in the end it wasnt, there I had blamed it on something that had nothing to do with it to begin with.

We all tend to get wiser with age, I still have a long ways to go with a lot of things but hey, we all make mistakes and can be wrong.

Ive just learned that we all need to be careful with our choice of words specially when we are dealing with a lot of reputable companies out there now days. All of these people work hard and spend lots of money on these products that they bring to the market for all of us.

Just wanted to hopefully help this young man learn a little something here....all you have to do is ask for help and you will get it, just need to be careful in how we name things when we ask is all.