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Century Radikal E640 - Swift 16 NX
› Glitching with LiPoly?
10-18-2004 07:38 AM  13 years agoPost 1
trvo

rrVeteran

Bognor Regis,UK,​Aurorra Ltd

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Hi Guys,

I just bought a LiPoly battery for my Hummingbird cos a few minutes isn't enough for me...However, I get serious glitching whenever I use the LiPoly but not with the BirdSeed...The Glitching is kinda like everything turning off and the on again. The LiPoly is 10.8V 1500MAh (3 Cell). Anyone else had this problem or can solve it? I don't like just leaving £40 sitting in a tin...

BTW, I have just put an Airwolf conversion kit on it with the aerial on the inside, that shouldn't make a difference should it as it still works with the birdseed?

Cheers - Trev.

-----
Trex 600e
Trex 600n
Aurorra Ltd, Align UK, Align Factory, CSM, Quick UK, Heli-Lessons

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10-18-2004 07:50 AM  13 years agoPost 2
Saint728

rrProfessor

Honolulu, Hawaii

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What motor, ESC, gyro, etc are you using? The LiPo battery is 11.1V not 10.8V. If you have a 10.8V battery it's probably a Li-Ion because those are usually 3.6V per cell. LiPo's are usually 3.7V per cell. Not sure what the "glitching" your getting is from without more information as to what your running? It could be caused by too much volts or maybe your ESC is shutting down because it can't handle the voltage? A birdseed battery is usually 8.4V.

Tak Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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10-18-2004 01:10 PM  13 years agoPost 3
trvo

rrVeteran

Bognor Regis,UK,​Aurorra Ltd

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Hi,

I am using the 370 Hummingbird motor, and all the standard hummingbird kit(Servos, Rx etc...), with the 3 - in - 1 hummingboard. This was bought as the "complete" kit. The battery is a 3 cell LiPo which (after a quick check) does read 11.1V on the multimeter but came labelled as a 10.8V battery...strange. It certainly isn't Li-Ion. It may be that the HummingBoard is having problems with the voltage, but I haven't heard of anyone else with this prob?

The glitching is like all the motors shutting down for a few milli-seconds, the servo's remain active though. After that everything returns to normal for a few seconds...?

The Birdseed causes absolutely no problems whatsoever but it is horrible to wait so long for it to charge and only get a few mins flight out of it, that is why I bought the LiPo.

Cheers - Trev.

-----
Trex 600e
Trex 600n
Aurorra Ltd, Align UK, Align Factory, CSM, Quick UK, Heli-Lessons

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10-18-2004 01:42 PM  13 years agoPost 4
RC-Hawk

rrApprentice

Westminster Colorado

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Make sure to check the packaging fo rhte board.
The stock hummingboard was labeled "for 8 volt operation" only.
As soon as I put in the 3 cell li-po, I started to fry my boards (blew 3 of them before I decided to go separates).
If you call Heli-World/Century hobbies, you are likely to get 2 different stories. One guy told me that the 3 cell li-po would work just fine in my heli. So naturally I figured it was something else. The next time I called them, a different guy told me that the 3 cell li-po was too much for the hummingboard.
Now that I have gone separates, all I go through are motors. Burned 2 mains and about 6 tail motors.
I am setting aside the $$ to go brushless for the main and still looking for a good alternative for the tail.


And to answer your question, yes, my servos got the jitters with the new 3 cell and the stock Century Rx and servos.

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10-18-2004 01:48 PM  13 years agoPost 5
trvo

rrVeteran

Bognor Regis,UK,​Aurorra Ltd

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Ok,

I'll just bung the LiPo in my Plank, not a huge loss...Go separates when I got the money, been planning to for a while anyway.

Cheers - Trev.

-----
Trex 600e
Trex 600n
Aurorra Ltd, Align UK, Align Factory, CSM, Quick UK, Heli-Lessons

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10-18-2004 08:08 PM  13 years agoPost 6
jeffs555

rrApprentice

North Carolina

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All those voltages like 3.5, 3.6, 10.8.11.1, are only nominal values and don't really mean anything. Lipoly and most Lithiuim Ion should be right at 4.2 volts per cell when fully charged(only a few LiIon are rated at 4.1 volts). When does your pack read 11.1 volts? If that is after flying for a while, it is normal, but if that is fresh off the charger, you have a problem with your charger. A freshly charged 3-cell pack should read right at 12.6volts.

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10-19-2004 07:22 AM  13 years agoPost 7
trvo

rrVeteran

Bognor Regis,UK,​Aurorra Ltd

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Hiya,

That was tested midway through using the battery, I did it then cos of the glitching, I haven't yet figured out how to use my charger, I think the 'supply' battery is a little flat or I got a duff one, it just won't turn on. A friend was kind enough to charge it in the first place. Going to take it back a get a digital one (probably prodigy).

Trev.

-----
Trex 600e
Trex 600n
Aurorra Ltd, Align UK, Align Factory, CSM, Quick UK, Heli-Lessons

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10-22-2004 08:40 PM  13 years agoPost 8
hb76

rrNovice

Massillon, Ohio

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I also have this problem when running the 11.1v lipo's. After looking at the HB boards they are only rated for 5 - 9.6v. So, I'm not sure if the old HB boards were updated for the new units don’t like 11.1. Watching your HB fall with no power to the ground isn't very much fun. I think the board in mine has a problem after trying this for the tail was holding with the new Futaba GY240 unit. Now the little guy will just turn around even if you push the stick all the way to correct it.

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10-22-2004 08:54 PM  13 years agoPost 9
RC-Hawk

rrApprentice

Westminster Colorado

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The boards ore only rated for 8 volts. The 3 cell li-poly will burn it out. If you call heli-world you get one answer "it won't work well, it won't last", and they suggest going with separates.
If you send them an E-mail, they will tell you that there are lots of people running them with no issues.

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