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E-flite . Fast Lad Performance . Ace Hobby

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e-Electric Batteries & Chargers > Name brand or not
 
 
OICU812
rrProfessor
Location: Grande Prairie, Alberta, Canada

My Posts This: Topic  Forum

Yup for a beginner good value, no arguing that.

...Once upon a time there were Nitros, flybars and frequency pins...
10-31-2009 03:16 AM
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Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		hmm

lots of good info on this thread. I look at it as cost per flight as well. if the cycles are high enough with a good pack I would consider that, but if the zippy's are getting only 50-60 flights a pack then it should be 3 times less.


-C
11-05-2009 02:16 AM
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Terrabit
Key Veteran
Location: Seattle, WA - USA

My Posts This: Topic  Forum		Fantastic write-up Shawn! Thanks!

Esprit Model
11-06-2009 07:19 AM
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misskimo
Key Veteran
Location: Alaska 13 years before , mississippi for 31 y

My Posts This: Topic  Forum		hey, its great to have these new Batteries ! a Proper setup will sure be easy on the gear train and having turbo add ( action) is a very big PLUS! Now if TP can keep up with demand! its UP there.

Team X-Era ,Team ThunderPower, Minicopter & Spartan Gyros
11-06-2009 08:05 AM
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Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		hmm

300-400 cycles on a 12s setup seems kind of costlly. Just looked a setup for 4 6s packs. 259 each. so 1040 for a 12s setup. 300 flights is a little over 3 bucks a pack. 400 cheaper yet, but it only takes one pile drive into the ground to make your cost savings go south.

Maybe if one is diligant on preflight checks and maintenance this would very much minimize this part of the equation.


-C
11-06-2009 03:07 PM
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Terrabit
Key Veteran
Location: Seattle, WA - USA

My Posts This: Topic  Forum		More like a one in a hundred pile drive. It's pretty rare that you destroy a pack in a crash, at least in my experience it is.

Esprit Model
11-06-2009 03:45 PM
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GScott
Key Veteran
Location: Lewis Center, OH

My Posts This: Topic  Forum		Shawn,

The big problem is we are assuming the new TP45's and Hyperions will actually live up to their claims. These same claims were made by Outrage, FP, etc... People jumped on these lipos and claimed they were the best ever and would bring everyone to electric. Once they got in the hands of the non-sponsored pilots guess what. They last 50-75 cycles if you were lucky. The FP's at our club were lucky to make it to 50 before you noticed a power drop or they puffed. Same for the Outrages. Until these new packs have been out for awhile and flown by everyday pilots we will not know if they truely live up to their claims.

As far as 5c charging it doesn't matter if TP or someone eventually comes out with a charger that will do the necessary 650w required to charge a 6s 5000 at 5c. What are you going to power it with? In the U.S. most residential outlets are powered by a 15 or 20 amp breaker and it is shared. Plan on running a dedicated 30 or 40 amp circuit from your electrical box if you plan to charge 5c at home. At the field you better have a hefty generator.
11-06-2009 04:03 PM
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GScott
Key Veteran
Location: Lewis Center, OH

My Posts This: Topic  Forum
Quote 
More like a one in a hundred pile drive. It's pretty rare that you destroy a pack in a crash, at least in my experience it is.

Depends on the heli. I had one crash on a Logo 500 last year and it took out the pack. It was a brand new pack with less than 5 cycles on it. The stock canopy is so thin it provided no protection at all up front and shattered like an egg on impact.
11-06-2009 04:07 PM
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Terrabit
Key Veteran
Location: Seattle, WA - USA

My Posts This: Topic  Forum		Actually. the claims about G3 and G4 lipos are a lot more profound than the ones made about Outrage. The difference is that the claims made about these lipos are being independantly confirmed. I have only been using Hyperion G3 VX and TP 45c lipos for a bit over a month but I can confirm that IR (internal resistance) has edged downward in this short period of time. How do you know when a lipo is worn out? When IR rises to a point where excessive heat reduces their usable charge cycle. Lower IR over a period of 50 cycles would indicate an increase in usable charge cycle.

Big difference!

Esprit Model
11-06-2009 04:13 PM
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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

My Posts This: Topic  Forum
Quote 
As far as 5c charging it doesn't matter if TP or someone eventually comes out with a charger that will do the necessary 650w required to charge a 6s 5000 at 5c. What are you going to power it with? In the U.S. most residential outlets are powered by a 15 or 20 amp breaker and it is shared. Plan on running a dedicated 30 or 40 amp circuit from your electrical box if you plan to charge 5c at home. At the field you better have a hefty generator.

This is not a problem. You are looking at things in terms of amps, not watts. Here is the math

For a 6s 5000mAh pack charged at 5C
C = 5
Watts = 5A * 5 * 25.2V = 630W

Now suppose we use a 24V power supply just so we can see how many amps it will take from the power supply

630W * 1.20 (120% of output for charger loss) = 756W
Amps = Watts/Volts = 756W/24V = 31.5A

So there is that number, now lets figure out how many amps you will need off a 120V line to supply this power supply

756W * 1.20 (again losses in power supply) = 907W
Amps = 907W/120V = 7.56A

Any household outlet should handle that. Plus any 1000W or greater generator will handle it also.

The real downside is that you won't be able to use a 12V source for full output, as it would need to provide about 65A of constant output and that is not going to happen, not even for a very capable hobbyist.

- Chris

TJinTech
Team New Mexico
11-06-2009 05:28 PM
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Terrabit
Key Veteran
Location: Seattle, WA - USA

My Posts This: Topic  Forum
Quote 
756W * 1.20 (again losses in power supply) = 907W
Amps = 907W/120V = 7.56A

Any household outlet can handle that.

That's not exactly true. You would expect it to be but it has not worked out that way for me. My previous residence was a new, million dollar home overlooking the Puget Sound in Seattle. It was built with Arc Fault circuit breakers. These things pop like crazy with little provocation. The house I live in now pops when I charge too even without said circuit breakers. Granted I am charging 2x 10s @ 7amps (just under 600watts). Still, it shouldn't be a broblem. I've used 2 different sets of chargers and three different power supplies in a few locations and I get the same circuit popping crap. Go figure!

Esprit Model
11-06-2009 06:40 PM
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GScott
Key Veteran
Location: Lewis Center, OH

My Posts This: Topic  Forum		My bad. That makes sense now. My power supply at home is only 12v/10 amp anyway. Guess it's time to upgrade

I don't trip any breakers but any time I try to charge at anything more than 1c on my 6s 5000 packs I get a voltage error on my Hyperion charger. This is off a 15 amp circuit I ran to my workspace.
11-06-2009 06:41 PM
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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

My Posts This: Topic  Forum		I have updated it to "should" because given a house is wired properly and you don't have a space heater on the same circuit, it should work without issue.

- Chris

TJinTech
Team New Mexico
11-06-2009 07:07 PM
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OICU812
rrProfessor
Location: Grande Prairie, Alberta, Canada

My Posts This: Topic  Forum		Gscott,

As terra says tests by independant testors on RCG non sponsored pilots are in fact confirming the TP45s and Hyperions are in FACT a different ball game, in output and in cycle life, take a read there by charles on both breeds. I realize and agree the hype was there for the outrage and a few others, I to suffered from that. However I feel this is finally the time where its not just hype no more as several are seeing the benifits from this new chemistry, what the TPs and Hyperions are using is in fact not the same at all from other lipos on the market.

...Once upon a time there were Nitros, flybars and frequency pins...
11-06-2009 07:59 PM
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Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		hmm

interesting. Do generators for 5c even come close currentlly? I have not had the need for one since my house is 1 mile from the fly field.

OICU812 I certainly hope so. I didnt realize the vast majority of batteries where this bad nor this expensive for a 'usable flight'. Can you imagine the guys buying 12-14s outrage or mid quality level batteries with near 1000.00usd in it to last 50 flights?



-C
11-06-2009 10:29 PM
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hootowl
rrProfessor
Location: Garnet Valley, Pa.

My Posts This: Topic  Forum		I was getting ready to make my first purchase from HobbyKing. I wanted a bunch of those little single cell lipos for all my Eflite birds. You know the 130 Mah jobs? After reading the reviews (on HobbyKing) I changed my mind. Most said they sucked.

'Blessed is the man who expects nothing, for he shall never be disappointed'
11-06-2009 11:14 PM
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TJinGuy
Elite Veteran
Location: Socorro, NM - USA

My Posts This: Topic  Forum
Quote 
Do generators for 5c even come close currentlly?

Your question makes no sense. What are you wanting to know?

- Chris

TJinTech
Team New Mexico
11-07-2009 12:18 AM
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Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		sorry

Let me clean up my thought process.

What I meant was what are current outputs for generators that are currentlly used and do they make sense to use for charging say duel 5s packs at 5c? Can they provide enough I*E?


-C
11-07-2009 12:58 AM
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Blade_Master1
Elite Veteran
Location: Canada

My Posts This: Topic  Forum		New chemistry, new this, new that

New Gamble

No Thanks

I'll stay with Hobby City for my lipo's

F-27
MSR
Terminator Raven
NX Pro
Raven50
K50
HawkPro(~rip)
Swift 550
11-07-2009 01:01 AM
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Terrabit
Key Veteran
Location: Seattle, WA - USA

My Posts This: Topic  Forum		You'll have no problem getting a generator that will meet your needs.

Esprit Model
11-07-2009 01:01 AM
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4 pages [ <<    <     1      2     ( 3 )     4     NEXT    >> ]1023 viewsPOST REPLY
Esprit Model . Thunder Power RC . Mikado Modellhubschrauber

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e-Electric Batteries & Chargers > Name brand or not
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