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HomeAircraftHelicopterBeginners Corner › Ionx problems
10-09-2012 07:06 AM  5 years agoPost 1
Noah58

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New Zealand

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Hi, I am completely new to this forum and near new to RC helicopters. The story so far is, some years ago I had the desire to try RC Helis and researched my options. I settled on the Ionx. At that time I could not get any help with this project so had to travel from my home ( New Zealand) to Australia where I spent a week or so with the agent who was very helpful and showed me the basics. Also I built my Ionx with his assistance. As time went on and life got in the way of things I didn't really have a lot of success with Heli flying so packed it away into storage. I dug it out again with a rekindled desire and more time to not let this hobby beat me. Batteries tested ok and charged up good and held their charge. First wind up of the machine resulted in clouds of smoke and a blown motor. I purchased a new one and installed it. Now the heli runs up nice, does everything it is supposed to but after about 5 minutes of tentative hovering the power backs off and will not reach revs. When I back back on the stick and throttle on again the revs come up and can hover for about 1/2 a minute then power drops off again.
My question is to you all, does this problem sound like the ESC may have lunched when the motor did? Or any other suggestions as to the problem.
Some details of the machine are as follows, The motor is a direct replacement of the blown original Hacker C50-10xl, ESC Hacker 70 - 0 heli, Batteries are thunder power 8000mah 18.5 volt x 2.
Nothing is seizing on the machine as I first thought but it does appear to only happen when things warm up. The battery voltage when this fault occurs are still in close to fully charged and show 19.7 volts on the volt meter.
I look forward to any help that you experts can provide.

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10-09-2012 10:35 AM  5 years agoPost 2
wrongler

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Brewerton, New York

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After your hover did you change the lipo and try again?
I would check the lipos, recharge them and see if its ok for another 5 minute hover. It seems that a TP 8000 pack should take a 5 min hover and be fine, but just double check them.

Bill Whittaker

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10-09-2012 07:46 PM  5 years agoPost 3
Noah58

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New Zealand

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Thanks for response. Batteries test fine, I used to get 18 - 20 minutes flight time before I put it in storage. Any one else out there with an opinion?

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10-09-2012 08:15 PM  5 years agoPost 4
Pistol Pete

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Seffner, FL

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Given the age of the batteries and the differences in flight time, it would be my first item to check "under load" and or downgrade them to "set-up" batts only.

Were they stored at approx 3.85V per cell?

~~Enjoying the hobby one flight at a time~~

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10-10-2012 11:27 PM  5 years agoPost 5
Noah58

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New Zealand

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Thanks PP, Yes I think you are probably correct and that it is the batteries failing under load. I cannot recall what charge they were at when I stored them but probably not 3.85. I am guessing a bit. Can you explain " downgrade them to set-up batteries only" please. I am fairly green on the finer points of all this. Can the batteries be rescued at all.

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10-11-2012 01:34 AM  5 years agoPost 6
RCHSF

rrKey Veteran

NC

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Downgrade them, he means use them for just bench testing stuff, and setting up. Not actual flight. Buy new lipos.

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10-11-2012 03:43 PM  5 years agoPost 7
Pistol Pete

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Seffner, FL

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Can the batteries be rescued at all.
You can cycle it on a smart charger and verify amount of amperes going in vs actual rating of batt. I go by 70%. If it cant hold 70% of its actual capacity, it gets *downgraded.

If you have a smart charger(balancing type), that can monitor each individual cell under load (discharge mode @ 1 ampere), a bad cell will display itself by rapid fall of voltage while the good ones are stable.

*downgraded: used for something else other than what it was actually purchased for. Be it bench testing equipment and or set ups. Bad cell? It gets removed, so a 6S becomes a 5S for a plane...as an example. No sense in discarding a good pack just because of one bad cell.

Best of luck!

~~Enjoying the hobby one flight at a time~~

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