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Other › Random motor cut out in flight. What the Heck?
10-11-2011 03:18 PM  6 years agoPost 1
Rogman88

rrElite Veteran

West Monroe, LA

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I was at the SRC a couple of weeks back and a really good pilot (Wilson Miller) had his Kontronics ESC's just die on him (one on each of his helis I think) while flying low to the ground causing the motors cut out (could have been the motor I guess) and crashes insued. Upon checking things out on the bench, everything seemed fine and he continued to spank the crap out of his Furions without issue. Well the same thing happened to me yesterday with my 80HV and Scorpion 4035-500. I was flying around 2.5 minutes in idleup 1 then flipped to idleup 2 and started doing some tic tocs when the motor cut out and had to auto in with very little blade energy causing broken landing gear and vertical fin. Does this happen often? What would cause a random cut out? Low voltage? I still had 3.83v per cell in my 12S packs. I didn't have my logger empty so doubt I can gain any info from it.

High Voltage just works better

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10-11-2011 04:27 PM  6 years agoPost 2
F1 Rocket

rrKey Veteran

Melbourne, Florida USA

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Most likely it was an over-current that shut it down. If it was just overheated it would have kept running at low power. Sometimes the Jive will detect some micro current spikes and shut down even though the average current is not that high. In this case sometimes cleaning and/or resoldering the connections. will cure the problem. I have also noticed the Jive will shut down on over-current easier when hot so a good heatsink helps, as does keeping the esc in good airflow.

Danny

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10-12-2011 06:11 PM  6 years agoPost 3
misskimo

rrElite Veteran

Alaska 17 years, before mississippi for 31y

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Scorps tend to be kinda ruff on a good esc? They spike high and run hot. At ircha , the diabolo went though a scorp motor in about 4 flight. We were hitting 180 amps and shutting the hv 120 down in rpms, Changed it out with the more forgiven xera and dropped 20 amps and same or better performance.

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10-12-2011 08:09 PM  6 years agoPost 4
J.Tubb

rrNovice

Tulsa, Oklahoma

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how many blinks did the ESC have when you landed? do you have the LIPO cutoff turned on? BTW who the heck is Wilson Miller I have never heard of him.

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10-13-2011 02:42 AM  6 years agoPost 5
Rogman88

rrElite Veteran

West Monroe, LA

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how many blinks did the ESC have when you landed?
Don't know as I wanted to get the batteries unplugged as fast as I could in case the 80HV went Castle Creamations on me.
Wilson Miller I have never heard of him.
Oh yes you have. You know the guy I'm talking about.

High Voltage just works better

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01-31-2012 05:40 PM  6 years agoPost 6
w.miller

rrVeteran

jenks, OK

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Roger the issue I was having is heat. If its very warm or hot, it will cut off and should give you like 3 blinks? I beleive? right after it cut; if you could hold your hand on the ESC then it mostlikly wasent heat. you tipically know by if you can leave your hand on heat sink.
Down in orlando it was like 76 degrees, perfect! But it was like 90% humitity, this would cut my power in 2 min flat everytime.
has it done it again?

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01-31-2012 06:13 PM  6 years agoPost 7
philip 01

rrElite Veteran

ft worth

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had a kontronix jive 120 do the same thing a few times. it was due to amp spikes. had to go to a 160 amp controller.

the jive does not like amp spikes much over 120 amps. that will cause it to shutdown.

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01-31-2012 07:16 PM  6 years agoPost 8
MrMel

rrProfessor

Gotland

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Actually, if you get a Jlog you will see it can handle 240A peaks..

Check blink codes, only then i can tell more, but do check motor connectors, resolder if needed.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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01-31-2012 07:18 PM  6 years agoPost 9
philip 01

rrElite Veteran

ft worth

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may have exceeded that.

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01-31-2012 09:37 PM  6 years agoPost 10
Justin Stuart (RIP)

rrMaster

Plano, Texas

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1+ for the JLog. But at the very least, like MrMel says, check the blink codes before you unplug the packs.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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01-31-2012 10:11 PM  6 years agoPost 11
philip 01

rrElite Veteran

ft worth

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the motor pulls 166amps with sport 3d so a 120 would not be my first choice.

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02-01-2012 02:59 PM  6 years agoPost 12
Richardmid1

rrProfessor

Leeds, England

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the motor pulls 166amps with sport 3d so a 120 would not be my first choice.
What heli is this! Logo Xxtreme on 10s?!

Thats around 7kw! Sport 3D?! Wow, whatever you do don't do hard 3D with that setup!

Kontronik themselves say you can almost double the current ratings by using the heat sink!

This issue is to do with heat not amp spikes.

60% of the time, it works every time!

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02-01-2012 03:01 PM  6 years agoPost 13
philip 01

rrElite Veteran

ft worth

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love the setup. hard 3d 200 amps.

no complaints. flys great.

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02-09-2012 05:17 PM  6 years agoPost 14
Turbinator

rrApprentice

Nanticoke, PA

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FAIL SAFE Activation possibly?
If the receiver went into hold for even just a split second the ESC sees a fail safe signal and cuts throttle and if spool up time is set slow you are on the ground by the time the motor has ramped up to any useable/noticable speed again. I know this from experience, drove me crazy until I figured out what was going on, it may be what happened in your case too.

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02-10-2012 04:07 PM  6 years agoPost 15
Daniel 17

rrNovice

Baytown tx,USA

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Trex 450 did something the other day, 90% thcrv idol1, first 10 seconds in the air, was like the esc was going into low volt protecton mod, but with power behind it. Align 35 esc 2200 30c, some things amiss, landed cked cell avg 3.9?

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02-10-2012 10:22 PM  6 years agoPost 16
Turbinator

rrApprentice

Nanticoke, PA

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It may have been spooling back up from a throttle to off command frm a hold condition, are u using PCM or DSM or some thing else? All still can get interferance and go into throttle hold. Try this with blades off heli, spool it up, put stick at half stick so head is turning speed it normally would be in flight, now turn your transmitter off and back on, see what happens, not hink what that would like like in the air and what you may be seeing, look familiar?

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02-11-2012 05:01 PM  6 years agoPost 17
Daniel 17

rrNovice

Baytown tx,USA

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Using Futaba 6ex 2.4, flew 2 other batts no sigh of the issue, have never messed with the fail safe settings, My brain is having a slow curve issue. Thanks good point.

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