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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Problems with ESC in Belt CP (or Lipos?)
 
 
apachedave
Heliman
Location: Fort Irwin, CA

I just got he Belt CP and really like the construction and fit of the parts. I test flew it today and noticed both of my new battery packs would start to give out in power output at five minutes and and at two minutes to much lower RPM. I really think it must be an ESC problem, not two brand new 1800 and 2200mah Lipos. Any thoughts out there?

ApacheDave
08-01-2008 06:31 PM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Borrow or buy a good namebrand pack and let us know if you have the same problem. I only get 7min out of the TREX So 5 on a new heli and new battery may not be far off. But the slow down after two minutes is scary. I wouldn't blame the ESC I'd look for binding in the head or the bearings the bearings usually come pretty dry and can use some oil. or the taibelt too tight just give it a real hard look as far as mechanical.

Canton MO backyard flying club
Club President
Team No funds left.
08-01-2008 06:43 PM
HOMEPAGE  
 
 
MMike
Elite Veteran
Location: Holland,Mi-USA

The Belt CP sure is a nice size from what I've seen,

I've seen a HBK2 "come alive" after a good shot of silicone to the boom.

5 minutes aint bad.

I think some of the marketing hype sets people up for disappointment.

My vote is youe ESC is FINE!

It's not real hot, is it?
08-02-2008 01:19 AM
HOMEPAGE  
 
 
apachedave
Heliman
Location: Fort Irwin, CA

Neither the ESC or the battery are overheated. If you are all saying that 5 or so minutes is not too bad, could it be that the batteries were on their first run? I balance charged the batts with an Align charger, so I'd say equipment to charge them was not an issue.

ApacheDave
08-02-2008 03:47 AM
 
 
tryan02
rrProfessor
Location: Canton, Missouri

Quote 
If you are all saying that 5 or so minutes is not too bad, could it be that the batteries were on their first run?

break in period for the battery the heli and the pilot. Get more time on it and see if it gets better or worse. You said 2 min. though you were loosing power? thats not right after 5min if your loosing power thats OK for now.

Canton MO backyard flying club
Club President
Team No funds left.
08-02-2008 04:02 AM
HOMEPAGE  
 
 
Gregor99
Elite Veteran
Location: Western Wa

Quote 
Align charger, so I'd say equipment to charge them was not an issue.
Does that charger tell you how many mah it's putting back into the pack? Thats the best indicator of actual pack consumption. If the charger doesn't give you that info, then I'd say you do have an equipment issue.

Canton MO backyard flying club
West Coast Chapter
08-02-2008 04:31 AM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

I have no indicator, so I guess saying it take a long time does not help. However, I've had good results with other lipos. I'll try making more runs to see if it improves.

ApacheDave
08-02-2008 05:32 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

I'd look for a new charger. For now you can check the resting voltage at the end of the flight. Here's an approximate consuption chart courtesy of Melnic.

Volts %capacity
4.20 100
4.17 98
4.13 95
4.10 92
4.07 89
4.03 86
4.00 82
3.96 78
3.93 74
3.90 69
3.87 64
3.83 59
3.80 53
3.77 47
3.73 36
3.70 22
3.66 12

Canton MO backyard flying club
West Coast Chapter
08-02-2008 05:52 AM
 
 
TJinGuy
Elite Veteran
Location: Socorro, NM - USA

Yeah I found that with my Mega Powers, 11.1v on the main leads was about 80% discharged. If it is above that then I am sure you are fine.

- Chris

Variety+spice+life+supporting_paper_towel_industry=
King2+Rex450+Protos+Concept30
08-02-2008 06:05 AM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

I took another good test flight and ran into a 2 minute "step down" in RPM that was very pronounced with the 1800 mah Esky Lipo. That is ridiculous. I'm charging it again and will try to measure voltage with a voltmeter. I'd like to trust my Align charger; it sure takes enough time to peak charge the pack. Maybe I'll be tempted to get one with voltmeter and amperage readout next time.

But seriously, it has no binding, the battery pack is barely warm (after two minutes) and the ESC is for sure warm on the heat sink, too warm to keep the hand on, but does not burn at the touch. Any moe opinions?

ApacheDave
08-02-2008 06:58 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

The FMA cellpro 4s can balance all cells on your pack in about 30 minutes. It fully charges the pack and gives a mah reading of what was put into the pack. The Cellpro 10s can do two at a time.

Are your packs fully charged? Are all cells balanced? How much mah did the charger put in the pack? Without this information its hard to tell what is going on. Maybe your charger is not as trustworthy as you might think.

The ESC will be warm if you are running a low throttle curve and using the built-in BEC. Might want to add a BEC. What's your throttle curve set to?

Canton MO backyard flying club
West Coast Chapter
08-02-2008 07:14 AM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

Hard to tell the throttle curve with the stock radio. Looks like I may be replacing the receiver to be able to do that some time. I do that with my other helicopters that are controlled by my Futaba T6XHS.

ApacheDave
08-02-2008 07:42 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

How does it behave in idle-up?

Canton MO backyard flying club
West Coast Chapter
08-02-2008 07:54 AM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

It does about the same, the idle is higher, but it will experience a drop off.

ApacheDave
08-02-2008 04:51 PM
 
 
Gregor99
Elite Veteran
Location: Western Wa

What's the history with the Belt CP and ESC? You mentioned the batteries were new. Is the heli new as well? You mentioned the 1800 is an Esky battery. What brand is the 2200?

Canton MO backyard flying club
West Coast Chapter
08-02-2008 04:57 PM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

OK, just did another test run. The battery at start (Got it on Ebay) read 12.74. Reading the chart provided earlier, it is at least 100% charged (3S). It ran for less than 2 minutes before it had the tell tale voltage or amperage drop off. I say amperage also because the battery voltage read 12.34, or about 92% charge. The ESC is stupidly hot. I think it is the ESC in not allowing enough amperage to go through. The heli is brand new, all stock RTF. Perhaps I need to call the seller (Nitro Planes) and tell them. They owe me a new ESC if that is the case.

But is it the ESC?

ApacheDave
08-02-2008 05:23 PM
 
 
Gregor99
Elite Veteran
Location: Western Wa

It sounds like the ESC, but a weak battery can do that as well. We'd need to swap out the ESC to confirm. I'd contact Nitro Planes and see what they are willing to do. If a new ESC does the same thing, I might be worth trying name brand packs. Good luck and keep us posted on your results.

Canton MO backyard flying club
West Coast Chapter
08-02-2008 05:53 PM
 
 
apachedave
Heliman
Location: Fort Irwin, CA

OK, I finally got back to flying this thing, or at least testing it out. In a series of emails, I requested (cajoled, influenced, begged, threatened) another ESC to replace the old one. I charged up both batteries, and if I trust the chart sent by an earlier person, had 100% power (12.8V). In both cases for two batteries, the helicopter RPM dropped off at about 1.5 minutes, at about half throttle. I used an improvised test rig since I was getting tired of seeing the helicopter drop quick to the ground at 1.5 to 2 minutes as before.

I am at a loss. The batteries show about 78% charge at drop off, lower than 100%, but not enough to do this I think. They are the original 1800 mah and a different 2200 mah lipo.

Has anyone had an experience like this? It is getting real annoying. I have two other Phoenix ESCs, but I would rather keep htem on other projects.

ApacheDave
09-19-2008 04:21 AM
 
 
fenderstrat
Elite Veteran
Location: Aston,Pa

no 3s lipo should ever be over 12.62V(+/-0.02V) for the pack after a charge, if the numbers you are posting are correct(12.74 and 12.8v),you have a serious problem with that charger and I would stop using it immediately.the voltage drop you are experiencing is from and overcharge condition.I am not one of those paranoid scared of lipo guys,I have been charging at 2 and 3c for over a year,find out the problen soon or make sure your lipos are in a safe area

also.you did break these lipos in?

http://www.runryder.com/helicopter/t461055p1/

PerformancePlusRC field rep
COMPASS helis field rep
Mini Titan/SE
HBK2
Futaba FASST
09-20-2008 03:50 PM
 
 
rchelicopter3
New Heliman
Location: Antelope CA USA

I got the same issue, the ESC shuts off after 2 minutes. I bought mine Belt CP from xheli.com, I reported the problem and they sent me a replacement for the ESC. This new one is even worst, shuts off after 1 minutes. So I bought a 30A Dynam ESC from helidirect.com for $25.00 and I can get 14 minutes flight out of the 11.1V 1800mAH. This is a known problem with the Belt CP ESC.
10-09-2008 06:25 PM
 
 
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e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Problems with ESC in Belt CP (or Lipos?)
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