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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › sev2 puffing batteries, what is the best esc settings
07-31-2007 03:25 AM  13 years ago
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baddynergy

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sierra madre, ca- usa

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sev2 puffing batteries, what is the best esc settings
I have a new sev2 with 3700kv motor and 35x speed controller. I am puffing every battery that goes in this thing with gentle flying.
Batteries; 2 TP extreme 2070
1 common sence 22c
1 align s100mah

My ESC setting are; brake disable
mid timing
high voltage cutoff
soft start
medium speed on throttle

12th pinion

I can not figure this one out. I am running the same set up everyone I know is using. When I spool up it will fly ok for about a minute, then it starts losing power intermittently combined with severe tail twitch. The motor is so hot I can barely tough it and the ESC is hot also. Is it possible I have a bad esc??

I let the batteries cool off and the sweeling goes down, the voltage is at3.7 in each cell. They are all balanced on the charger.
**Unattended children will be givin a shot of espresso and a puppy**
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07-31-2007 05:12 AM  13 years ago
Prophet

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-How hot is it outside when you fly?
-What charger do you use?
-How long are you flying for?
-What percent MAH are you putting back into your batteries?
(you should never put in any more than 80 percent capacity)
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07-31-2007 05:13 AM  13 years ago
Prophet

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Also, it is critical that your pinion gear mesh is not too tight as you will strain the motor and cause it to dump the battery too fast.
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07-31-2007 05:15 AM  13 years ago
baddynergy

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Today it was 90degt outside
Commonsense balance charger
today I got 3 minutes
put back 400mah
**Unattended children will be givin a shot of espresso and a puppy**
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07-31-2007 05:16 AM  13 years ago
baddynergy

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The gear mesh is perfect and the belt is loose, can almost touch the other side of the belt. All ball links are as smooth as silk with no binding anywhere.**Unattended children will be givin a shot of espresso and a puppy**
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07-31-2007 05:32 AM  13 years ago
baddynergy

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My gyro gain is all the way down to 28, it only starts twitching when the battery is starting to puff and run down. But that is 3-4 minutes into flight. Like in my previous post the gear mesh is really nice almost to loose all the way around the gear.

have there been any problems with this motor or esc?/

I am thinking of trying an 11 tooth pinion. This has me totally stumped except maybe a bad motor or esc.

Just so you know, this heli doesnt even have 10 flights on her, it is brand new. Never wrecked with 325 woodies.
**Unattended children will be givin a shot of espresso and a puppy**
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07-31-2007 05:35 AM  13 years ago
Prophet

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Check if any bearings are seized and the whole drive system is smooth. I'm not sure how bad the puffing is but it actually is normal for lipos to swell a little bit when they are hot and then shrink back down when they cool off. If all else fails, try a different motor/esc combo.

I can see a cheep battery getting puffed, but when you say that
the thunder power packs are puffing then there is definately something wrong.
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07-31-2007 05:45 AM  13 years ago
LouInSD

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sounds like a bad motor
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07-31-2007 06:53 AM  13 years ago
zeese5

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I'm not sure how bad the puffing is but it actually is normal for lipos to swell a little bit when they are hot and then shrink back down when they cool off.
Is it true? Can someone else verify this, just to enlighntened my heart. Right now, I'm sad because many of my lipos start to puff a little (when hot) and all the lipos are still less than 20 cycles..

Anway, I'm also using the same electronic as badrapper.. sev2 with 3700kv motor and 35x speed controller. After each flights, the motor & esc are hot. Using 2200Mah 20C lipo, the longest I can fly is 7 minutes. I'm not able to beat more than that. All the gear & belt tension is ok, not tight. I'm envy when people say they can get more than 10 minutes while I cannot
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07-31-2007 08:15 AM  13 years ago
menace

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Sydney, Australia

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Whats your throttle curve?

if you are running a thr crv below 85% across the board, mine tends to warm up a bit, so i am running 100% across the board in idle up1 and i would use the 11T pinion and try that on a 1min flight and check the motor, ESC, and lipo temp, then charge , then another flight of 2mins and check again

and monitor how much Mah u put back into the lipo
!boo!
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07-31-2007 08:19 AM  13 years ago
menace

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if its any consolation i only have 4min flights and that is enough for my little brain to handle!boo!
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07-31-2007 09:23 AM  13 years ago
Prophet

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another suggestion:
If you want to keep the same motor and esc you could try a set of Airthunder lipo packs. They are supposed to be bulletproof (no puffing). I havent tried these yet though...
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07-31-2007 12:18 PM  13 years ago
TomRex

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Check your solder joints!!!!!Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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07-31-2007 09:29 PM  13 years ago
T-Rex-Flyer

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Panama City, Fl

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Three more question
Does you ESC get hot as well?
Are you using digatle servo?
Is you motor runing in it's most effecint range, and not hot?
With that motor and pinon, I'm gusing you're headspeed should be around 2700-2800. If not you're motor maybe working to hard.
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07-31-2007 11:21 PM  13 years ago
JasonF

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Northern VA

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I just puffed an Align 2100 22C pack the other day using the 430XL motor and the Kontronic Jazz ESC. 11T pinion and 72% throttle. (I know this pinion is small, the heli is for camera work at slower RPMs). The puffing happened in 5 minutes of mild aerobatic flight. It was 90-95 degrees out. I charged and flew the puffed pack 2 more times later in the day and it still seemed to work normally. Ideas?

Jason
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08-01-2007 03:28 AM  13 years ago
baddynergy

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I am running 85% throttle in idle 1 and 100 in idle 2. The speed control gets hot but not nearly as hot as the motor. I havent tached the head head but I am guessin in the 2800 range.

hs65mg servos
401 w/9650 on the tail
Not much of a current load there. We are going to put the motor on a meter to see what its draw is. A buddy had the same thing with his v2 at first and it turned out to be the motor.
**Unattended children will be givin a shot of espresso and a puppy**
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08-01-2007 04:05 AM  13 years ago
vic20owner

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St. Pete, FL

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How tight is your tail belt? How easy does your rotor and tail assembly spin with the motor pulled back or pinion removed?helicopter pilots beat the air into submission
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08-01-2007 04:20 AM  13 years ago
Prophet

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He says that everything is smooth.
TomRex has a good point, check your solder joints from the esc to the motor. A poor joint could be the cause of the symptoms you mention.
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