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› What would be a LIPO FAILURE sign???
04-03-2009 05:31 AM  9 years agoPost 1
tito996

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miami

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This is a noob question to all the pros outthere,, i have a exi450 with an align 2100 mah 20c lipo, align motor and esc wich i think ive only had about 50 flights in it, but now when i try to spool up on the heli at about 1/4 of throtle the heli just dies ,i wait about 10 seconds try to spool again ,,,the starts to spin and then just dies again. I have a 11t pinion on the motor and all the flights were just regular hovers and FF ,nothing 3d.
Is this a sign that my batt is messed up already or maybe the esc i dont know,,, ill apreciate all the help i can get guys,,,

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04-03-2009 05:35 AM  9 years agoPost 2
Heli 770

rrProfessor

USA.

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How many mah are you putting back in the batt when you charge it?

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04-03-2009 05:50 AM  9 years agoPost 3
30636086

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Tacoma, WA

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Is this a sign that my batt is messed up already or maybe the esc i dont know,,, ill apreciate all the help i can get guys,,,
If your battery is charged and it does that it could be a sign of ESC.

But we are gonna need the info of what charger are you using for your lipos and how are you charging them and so on

I dont suffer from mental iIlness, I actually enjoy mine!

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04-03-2009 06:01 AM  9 years agoPost 4
what_the_helli

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cookeville, tn USA

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is it doing this after a rebuild from a crash?

I put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com

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04-03-2009 06:08 AM  9 years agoPost 5
Rob_T

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It certainly might be your battery, but there's no way to be sure apart from trying a different battery. There are lots of good deals to be had on batteries right now too.

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04-03-2009 06:28 AM  9 years agoPost 6
TJinGuy

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Socorro, NM - USA

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I have not seen or heard of a lipo failing in that manner. You may very well have a weak battery though. More likely it sounds more like a esc/bec issue but it might not be the escs fault. Maybe you have a bearing going out somewhere that is making the motor draw lots of current and overheating it or making the pack voltage drop too low? I have had a similar problem with a digital tail servo waging hard and overheating the bec in a Castle Creations esc on my King2. I would take off but when the tail wagged hard, the esc would go into thermal shutdown. Once it settled on the ground I could spin it right back up again.

- Chris

Team New Mexico
TJinTech

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04-03-2009 08:26 AM  9 years agoPost 7
tito996

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miami

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,,,,
i cant really tell how many mah im putting back in the pack cus the charger that i have is a ****ty one from exceed rc ,it just charges the pack u know, when the lil light stops flashing i know its charged , and yes i just had a minor crash wich i only broke one of the head blades that was it,,
could it be my RX cus i did soldered back one of the antennas,,could that be it??????

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04-03-2009 02:34 PM  9 years agoPost 8
Heli 770

rrProfessor

USA.

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Did your problems start after you soldered the ant. back on? It's going to be hard trouble shooting without a known good batt. pack.

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04-03-2009 07:13 PM  9 years agoPost 9
procrasher

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Cedar Capids, IA

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This sounds like your ESC. Although it does not take much of a crash to ruin a bearing. If you do not have an extra battery than you could start by checking the bearings to make sure they are smooth and also unhook the motor from the heli so it can spin free and run it and see if it still shuts off like it did before. You can also check your battery voltage it that time and see if it is were it should be. Run the motor at close to full throttle and check if the battery is holding up or if the motor shuts off. I was having a problem with my heli having week power and I could not figure it out as I only had a minor crash which only damaged the main blades so I thought. It tuned out that this minor crash bent the shaft of the motor due to the sudden stop of the head. This was on a 400 sized heli and the motor was a park 400. I actually was able to bend the shaft back to strait and used it for quite a while after that before I decided to replace it before the bearings failed.

If I say duck, I'm not talking about a bird that quacks!

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04-03-2009 07:42 PM  9 years agoPost 10
tito996

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miami

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,,,,
yes this started after i soldered the antena back on,

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04-03-2009 08:02 PM  9 years agoPost 11
Rob_T

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If the antenna is not soldered back correctly the receiver will be more sensitive to interference. As the motor starts to spin the amount of interference will increase and with an antenna problem that might be enough to cause the receiver to lose the signal, in which case the ESC will go into "failsafe" after a second or two.

So that might well be the cause.

In general for troubleshooting start either with what you changed last (if there was something), otherwise start with the cheapest items, which right now is the battery (you can get 3S 2100 batteries for under $20 right now). Move on to the ESC and motor only after you eliminate the battery as the cause of the problem. (Extra batteries are useful anyway...)

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04-03-2009 10:47 PM  9 years agoPost 12
what_the_helli

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cookeville, tn USA

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I agree get a new battery, try it first. your going to either NEED a new one or you'll WANT another later. Either way your golden. best place to start.

I put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com

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04-03-2009 10:51 PM  9 years agoPost 13
Wingman77

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Pulaski Tennessee

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I don't think it is the battery, I think it is the charger. do you have a club or somewhere that you can use a friends charger? hopefully a charger with a display.

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04-04-2009 07:32 AM  9 years agoPost 14
Rob_T

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Do you have a voltmeter, or can you borrow one? If you do, check that the battery is about 12.5 to 12.6V fresh off the charger. If it's not, then you should suspect your charger, if it's in that range your charger is probably OK.

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04-04-2009 01:08 PM  9 years agoPost 15
Heli 770

rrProfessor

USA.

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The only problem with checking a batt. pack with a volt meter is it won't let you know the capacity the batt. pack is holding.

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04-04-2009 06:51 PM  9 years agoPost 16
Rob_T

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The only problem with checking a batt. pack with a volt meter is it won't let you know the capacity the batt. pack is holding.
Very true. I was trying to help the OP tell if he has a charger problem as Wingman77 suggested. A voltmeter will tell you if your charger is not putting a full charge back into the battery, even if it doesn't tell you how much that charge was.

Right now Harbor Freight has digital voltmeters on sale for $2.99 - I didn't stop to examine them to see if they're any good but the price sure is!

A charger with a digital readout would be a good upgrade from tito996's current situation (something he'll probably want in the long run) but it might not solve the problem he has right now. I'm trying to help him solve the problem while spending the least amount of his money.

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04-04-2009 06:59 PM  9 years agoPost 17
Heli 770

rrProfessor

USA.

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Rob T. My post really wasn't directed to you. I didn't want him to think that the batt. pack was good just because the voltage showed 12.60volts.

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04-04-2009 07:28 PM  9 years agoPost 18
Wingman77

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Pulaski Tennessee

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he should also check the indevidual cells with the voltmeter.

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04-09-2009 10:14 AM  9 years agoPost 19
naked painter

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Mid glamorgan uk

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I had similiar on a 600e. ESC eventually failed.

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04-09-2009 09:10 PM  9 years agoPost 20
MaxAdventure

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Northern CO

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a watt meter is the most valuable tool when trying to diagnose e power issues. You can see what the amp draw is, what happens to the pack volts under load, etc.

Everyone running electric should invest in at least one decent watt meter IMHO.

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