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sl4ppy · 02-19-2012, 06:47 PM

I had originally mounted my ESC just under the battery tray between the frames, but after doing some final dial in's today with some sport flying (first time since more than just hovering), the ESC kept cutting off completely mid-flight with an indecipherable (ie. not in the ESC manual) sequence of beeps. I am assuming it's an overheat cutoff, and while the esc is hot, it isn't so hot that I cant touch it.

After letting it cool down for :30-:60s, it would fly again normally for another minute or two.

So I moved the ESC to the side of the frame just behind (but not covered by) the canopy so it would have a LOT more air circulation. Same deal. :/

If I fly with NO canopy, I have no issues and she buzzes along just fine; inverted, et. al.

So I'm perplexed. Is the ESC just hyper sensitive? Anyone else have overheating issues?

I'm running stock everything and Turnigy 2200 mAh 3s1 '20-30c' batteries.

Should I opt for a different brand than the stock Hirobo?

mattks · 02-20-2012, 06:54 AM

I had the same issue. Some of the guys at my field also had the issue. Mine would cut out at around 3min50secs. I am running Hyperion 2600. Also mine had a horrible tail kick changing to idle up or back to hover mode and the governor section didnt work nicely at all. I changed the stock esc for the Kontrobu Koby 55. No looking back. Tail kick gone, motor sounds smoother, dont ask me why, and I can go for 7 minutes now flying light sport. Never had a thermal shutdown. Mounted the Kontronik under the frames.

kcgraves · 02-21-2012, 05:45 AM

I also had a similar problem where around 2 minutes everything would just cut out. Tried a different ESC but eventually found the problem was a bad receiver. Put a different one in and problem was solved. Just a thought.

sl4ppy · 02-21-2012, 11:53 AM

Quote:

Originally Posted by kcgraves

I also had a similar problem where around 2 minutes everything would just cut out. Tried a different ESC but eventually found the problem was a bad receiver. Put a different one in and problem was solved. Just a thought.

Hmm.. I'll check that, but Im pretty convinced it is an ESC thing. Mostly because it does give an undocumented series of beeps just as it cuts out...

iirc it's 2 quick beeps, a pause, and 2 more quick beeps.

sl4ppy · 02-21-2012, 05:15 PM

I may go with a diff ESC, I think, but ooof, that Kontrobu Koby 55 is $190???!?!!!

Is it THAT much better than a 50amp Castle Creations for $80?

mattks · 02-21-2012, 10:49 PM

Dont know sl4ppy. That's all my lhs had and I wanted to fly my embla. Internet shopping not the fastest in south Africa so options limited.

mattks · 02-24-2012, 11:43 AM

You solved your problem yet sl4ppy?

Sent from my iPad using Tapatalk HD

sl4ppy · 02-25-2012, 09:37 AM

no, not yet. Will probably just replace it. :/

sl4ppy · 02-25-2012, 11:24 AM

Did some more testing this morning..

What's happening is that mid flight it is entering programming mode?!?!?!

What would cause it to do that?!

kcgraves · 02-25-2012, 11:31 AM

Not familiar with that particular ESC but most of them have a way to set the throttle stick end points. Try doing that.

mattks · 02-25-2012, 10:11 PM

Broke mine yesterday.

second time I had this problem, don't think I am dumb thumbing it that bad. After about 4 minutes of flight the machine just gets pushed down to the deck even although I am coming up on the collective. Manage to keep her straight and level onto te skids. At this point no damage. Replace battery, take of and she climbs like a rocket to the left. Only way to get her down is throttle hold, still cant get negative pitch. If u looking from tail boom to the front, front left servo horn is sheared and the front right servo has failed. Second time identical sequence. I don't think I am repeating the same dumb thumb sequence twice. Any ideas? I am sure something is failing.

Sent from my iPad using Tapatalk HD

02-19-2012, 06:47 PM	#1 (permalink)
sl4ppy Registered Users Join Date: Dec 2006	ESC cutting out? I had originally mounted my ESC just under the battery tray between the frames, but after doing some final dial in's today with some sport flying (first time since more than just hovering), the ESC kept cutting off completely mid-flight with an indecipherable (ie. not in the ESC manual) sequence of beeps. I am assuming it's an overheat cutoff, and while the esc is hot, it isn't so hot that I cant touch it. After letting it cool down for :30-:60s, it would fly again normally for another minute or two. So I moved the ESC to the side of the frame just behind (but not covered by) the canopy so it would have a LOT more air circulation. Same deal. :/ If I fly with NO canopy, I have no issues and she buzzes along just fine; inverted, et. al. So I'm perplexed. Is the ESC just hyper sensitive? Anyone else have overheating issues? I'm running stock everything and Turnigy 2200 mAh 3s1 '20-30c' batteries. Should I opt for a different brand than the stock Hirobo?

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02-20-2012, 06:54 AM	#2 (permalink)
mattks Registered Users Join Date: Jun 2010	I had the same issue. Some of the guys at my field also had the issue. Mine would cut out at around 3min50secs. I am running Hyperion 2600. Also mine had a horrible tail kick changing to idle up or back to hover mode and the governor section didnt work nicely at all. I changed the stock esc for the Kontrobu Koby 55. No looking back. Tail kick gone, motor sounds smoother, dont ask me why, and I can go for 7 minutes now flying light sport. Never had a thermal shutdown. Mounted the Kontronik under the frames.

02-21-2012, 05:45 AM	#3 (permalink)
kcgraves Registered Users Join Date: Oct 2008	I also had a similar problem where around 2 minutes everything would just cut out. Tried a different ESC but eventually found the problem was a bad receiver. Put a different one in and problem was solved. Just a thought.

02-21-2012, 05:15 PM	#5 (permalink)
sl4ppy Registered Users Thread Starter Join Date: Dec 2006	I may go with a diff ESC, I think, but ooof, that Kontrobu Koby 55 is $190???!?!!! Is it THAT much better than a 50amp Castle Creations for $80?

02-21-2012, 10:49 PM	#6 (permalink)
mattks Registered Users Join Date: Jun 2010	Dont know sl4ppy. That's all my lhs had and I wanted to fly my embla. Internet shopping not the fastest in south Africa so options limited.

02-24-2012, 11:43 AM	#7 (permalink)
mattks Registered Users Join Date: Jun 2010	You solved your problem yet sl4ppy? Sent from my iPad using Tapatalk HD

02-25-2012, 09:37 AM	#8 (permalink)
sl4ppy Registered Users Thread Starter Join Date: Dec 2006	no, not yet. Will probably just replace it. :/

02-25-2012, 11:24 AM	#9 (permalink)
sl4ppy Registered Users Thread Starter Join Date: Dec 2006	Did some more testing this morning.. What's happening is that mid flight it is entering programming mode?!?!?! What would cause it to do that?!

02-25-2012, 11:31 AM	#10 (permalink)
kcgraves Registered Users Join Date: Oct 2008	Not familiar with that particular ESC but most of them have a way to set the throttle stick end points. Try doing that.

02-25-2012, 10:11 PM	#11 (permalink)
mattks Registered Users Join Date: Jun 2010	Broke mine yesterday. second time I had this problem, don't think I am dumb thumbing it that bad. After about 4 minutes of flight the machine just gets pushed down to the deck even although I am coming up on the collective. Manage to keep her straight and level onto te skids. At this point no damage. Replace battery, take of and she climbs like a rocket to the left. Only way to get her down is throttle hold, still cant get negative pitch. If u looking from tail boom to the front, front left servo horn is sheared and the front right servo has failed. Second time identical sequence. I don't think I am repeating the same dumb thumb sequence twice. Any ideas? I am sure something is failing. Sent from my iPad using Tapatalk HD

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