A simple LiPo performance tool - Page 39 - RC Groups
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Dec 10, 2012, 11:05 AM
Registered User
Quote:
Originally Posted by cseb
Hi,

No point in making it commercial. You can buy it at HobbyKing for USD40. :-) It is a very simple circuit. No manufacturer would pay for it.

Regards,
Csaba
This meter has been discussed a few times....

https://www.rcgroups.com/forums/show...8&postcount=18

https://www.rcgroups.com/forums/show...&postcount=509

https://www.rcgroups.com/forums/show...9&postcount=91

Mark
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Dec 10, 2012, 11:07 AM
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Hm, typical for them, I reckon.
Dec 10, 2012, 12:27 PM
Registered User
Tried again and got the HK link. HOW DO YOU DELETE POSTS IN HERE?


Link doesn't work for me. HK says it's trying to access a page that no longer exists.


Dec 10, 2012, 12:44 PM
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Aviefly's Avatar
Quote:
Originally Posted by sailr
Tried again and got the HK link. HOW DO YOU DELETE POSTS IN HERE?


Link doesn't work for me. HK says it's trying to access a page that no longer exists.
I wouldn't worry about it, the meter is a heap anyway. If you want something that gives you meaningful results have a look at this thread. Available at a couple of places in the States I believe, or direct from the designer and manufacturer.
Dec 10, 2012, 12:51 PM
Registered User
Quote:
Originally Posted by JohnathanSwift
Hm, typical for them, I reckon.
Right you are JS!

Unfortunately, one does not have to have any clue as to what he is doing to design and market a product. Fortunately, the 7 in 1 meter has many other features that are seemingly correctly implemented and will provide the end-user with some utility.

The IR function will be marginally useful for really small packs with high IR but will be completely useless for high performance lipolys. For these, one of the proven tools (Wayne Giles' ESR Meter, FMA or iCharger charger) that employs 4-wire measurement is required.

Mark
Jan 04, 2013, 03:59 PM
Donate Platelets
Hi:

Where is the definition of the Figure of Merit (FOM)?

- Jim
Jan 04, 2013, 04:02 PM
ancora imparo
jj604's Avatar
Jim it's in the link in post #4

https://www.rcgroups.com/forums/show...6#post17452835

John
Jan 22, 2013, 05:44 AM
Registered User
Can I calculate IR from this graph?
http://img204.imageshack.us/img204/3469/nano6650adc.jpg

Start voltage is 8,40V and Load is about 62Amps Voltage drops somewhere 7,7-7,6Volts

Capacity is 6.6Ah
Mar 08, 2013, 07:40 PM
Ignint McNugget
Rumple's Avatar
I recently purchased an ARF from Value Hobby, and noticed they had three different "models" of 3s 1300 packs for sale on the site (a 30C, a 40C, and an Elite 40C, wow!). I ordered one of each out of curiosity to evaluate their performance. Data here.

Unless they improve with age and cycles, I am quite unimpressed with their current "true C" rating of approximately half of the label rating.
Mar 08, 2013, 09:02 PM
The 6 P principle works for me
elecfryer's Avatar
Quote:
Originally Posted by Rumple
I recently purchased an ARF from Value Hobby, and noticed they had three different "models" of 3s 1300 packs for sale on the site (a 30C, a 40C, and an Elite 40C, wow!). I ordered one of each out of curiosity to evaluate their performance. Data here.

Unless they improve with age and cycles, I am quite unimpressed with their current "true C" rating of approximately half of the label rating.
Ah.......the "Wayneometer", I love mine very much!

I have yet to discover any lipo (commercially available) with a "true C" of over 30. That being said, todays lipo batteries are a lot better than what we had 6 years ago and cost a lot less! Also, please keep in mind that lipo "sellers" do not tell us the methodology by which they grade their lipos! Their definition of 30C and our definition of 30C may be different!

I say sellers cause we sure ain't buying them from the manufacturers!

Michael (if your not fryin, your not tryin!)
Mar 10, 2013, 02:02 PM
ago involo ergo sum
MikeAnderson's Avatar

Article published in Model Aviation Canada


Here's a short article I wrote for the January 2013 edition of Model Aviation Canada capturing the essence of this thread in a size limited by the publisher.

Enjoy...
Mar 10, 2013, 02:33 PM
Suspended Account
Thanks for posting!
Mar 10, 2013, 03:09 PM
wood is good
loNslo's Avatar
Mike--Nothing comes up except links to other one-line posts. But no data.
Mar 10, 2013, 03:25 PM
The 6 P principle works for me
elecfryer's Avatar
Quote:
Originally Posted by loNslo
Mike--Nothing comes up except links to other one-line posts. But no data.
It came right up for me! I saved it and then opened it and read it, no problem!

Michael
Mar 10, 2013, 03:31 PM
ago involo ergo sum
MikeAnderson's Avatar
It's a PDF so you need the latest version of Acrobat to read it. Fortunately Acrobat reader is free: http://get.adobe.com/reader

Quote:
Originally Posted by loNslo
Mike--Nothing comes up except links to other one-line posts. But no data.


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