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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › All of the sudden???
12-29-2019 02:23 AM  26 days ago
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HeliOCD

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San Diego, CA

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All of the sudden???
I have been flying my T-Rex 550 for years on 6s 5000mAh 50c battery's.
All of the sudden 2 battery's in a row have gotten hot and puffed up.
Any idea's Motor 600MX and BL70G esc.
Its all earth!
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12-29-2019 07:05 AM  26 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Puffed up while flying...

600MX motor is over size for the 550 application. 90 Amp max.

BL70G can handle up to 70 Amp.

5000 mAH at 50C, 250 Amp...

Your combination ESC/Motor are not causing stress over your packs...

Trex 550 may consume 45-50 Amp.

In My opinion, your combination motor/ESC is not causing the problem.

5000mah 50C lipo pack...
Getting old?
How many cicles this pack?
60 cicles should be enough.

/
Saludos cordiales,
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12-29-2019 04:21 PM  26 days ago
Rockin Bird

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St Gabriel, La

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I had the same problem, someone told my the big change in the temperature could have made it puff .I have been ordering new batteries lately. I am sure that most of my batteries are old and have been charged numerous times over and over.Its a lot safer with the new batteries, but the prices keep getting higher, hope I get a lot of use from them.Have a great New Year.That sweet smell of "Nitro"
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12-29-2019 04:56 PM  26 days ago
utahbob

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St. George Utah

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Yeah..how many cycles on the packs..and how long are your flights..as they age you have to start doing shorter flights..I have two 5000's that have 160 cycles on them..they get warm and puff a little..I've cut my flight time back to 4:20 and fly a little gentler..I will probably retire them soon as they are 4-5 yrs.old.I do a great decending funnel!
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12-29-2019 08:34 PM  26 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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160 flights... It is a lot of cicles.

My 6s voltz, 4200 mAH, 25C...
60 cicles and still running but only 3 minutes...

/
Saludos cordiales,
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12-30-2019 02:49 AM  25 days ago
utahbob

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St. George Utah

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They are the early Gens Ace..I put them in service in June of 2014..put 5 gentle break-in flights on them..never discharged below 3.7 volts per cell and stored in room temp..163 cycles to be exact..I do a great decending funnel!
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