RE: Confused as can be with chargers.    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Confused as can be with chargers.
Page: <<   < prev  1 [2]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
RE: Confused as can be with chargers. - 11/12/2012 2:04 AM   
Max_Power



Posts: 565
Score: 127
Joined: 5/14/2005
Last Login: 5/9/2013
From: Savage, MN, USA
Status: offline 		You need to take a few hours and get down in your mind exactly what voltage, amperage, "c" (charge or discharge rate) etc are....from there it is just punching numbers into a calculator. But if you concentrate on what numbers people throw around here or what timing numbers make the motor mimic optimal setting you are bound to get wrong at some point...just like anything, spend a bit of time to learn the basics(which is pretty easy if you ignore all these tricks and just learn the 4-5 basic term and what they mean to the total calculations. anything else and you are just headed for mistakes and needing someone else to do the math every time yu change something....learn about "c" as far as charge and discharge and how voltage and mah ratings work in"! series and parallel circuits!" and that will not vary as it is basic electrical math....then whatever yo want to do you will just be able to look at specs and figure out....paying attention to any "tricks" like altering timing to mimic a different voltage is, at this point just doing yourself a dis service....the basics are pretty easy if you focus on only them.

_____________________________

"A guy told me the other day I must be very smart,......I told him "No!, I''m REALLY dumb, But learning from my mistakes!!""

Hide Signatures

(in reply to jamesfarrell)
       Post #: 26

RE: Confused as can be with chargers. - 11/12/2012 2:19 AM   
jamesfarrell


 

Posts: 23
Score: 100
Joined: 11/10/2012
Last Login: 12/29/2012
From: WorcesterMA, USA
Status: offline 		I'm wondering if there is 1 single resource you can recommend for that?

Thanks, Kevin 

Hide Signatures

(in reply to Max_Power)
       Post #: 27

RE: Confused as can be with chargers. - 11/12/2012 2:18 PM   
hugger-4641



Posts: 1786
Score: 229
Joined: 11/1/2008
Last Login: 5/23/2013
From: McKenzie, TN, USA
Status: offline 		http://www.rcuniverse.com/forum/m_7100376/tm.htm

The link above is a good place to start.


_____________________________

Jerry
AMA -922698 Nomal people scare me, but not as much as I scare them...

Hide Signatures

(in reply to jamesfarrell)
       Post #: 28

RE: Confused as can be with chargers. - 11/12/2012 5:08 PM   
trax de max


 

Posts: 380
Score: 114
Joined: 10/18/2010
Last Login: 5/24/2013
From: newcastle, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: jamesfarrell

I don't know, I should probably read the book. 

Ive 'tried' reading the powerlab manual. Got the basics, connected it to laptop, if i do an error it tells me and suggests a fix, some i can change but needs practice.


_____________________________

Sorry officer i thought the speed limit only applied to people with driving licenses.

Hide Signatures

(in reply to jamesfarrell)
       Post #: 29

RE: Confused as can be with chargers. - 11/12/2012 6:27 PM   
Johnny_Zero


 

Posts: 619
Score: 105
Joined: 10/21/2005
Last Login: 5/24/2013
From: Golden, CO, USA
Status: offline 		Here is a link to a great charger....you probably will never need another charger. I have this charger and love it.

http://www.hobbypartz.com/26p-ultimate800-charger.html



_____________________________

Carl Goldberg Ultimate Brotherhood # 60.

Hide Signatures

(in reply to trax de max)
       Post #: 30

RE: Confused as can be with chargers. - 11/12/2012 8:18 PM   
4*60


 

Posts: 1647
Score: 111
Joined: 3/10/2002
Last Login: 5/24/2013
From: Shuswap, BC, CANADA
Status: offline 		Or you buy two of these

http://www.hobbypartz.com/26p-balancecharger-6200.html

Get the same result for 98 and sometimes on sale.  Also, if one goes bad you replace one for under $50 rather than ....  Anywaywhat youbought is good, just a little more money.


_____________________________

"Of course, that''''s just my opinion. I could be wrong." the other Dennis Miller

Hide Signatures

(in reply to Johnny_Zero)
       Post #: 31

RE: Confused as can be with chargers. - 11/12/2012 9:51 PM   
trax de max


 

Posts: 380
Score: 114
Joined: 10/18/2010
Last Login: 5/24/2013
From: newcastle, UNITED KINGDOM
Status: offline 		Both impressive. My only downside is that now I like to use the laptop to see everything thats happening.
This is using the 12V supply.

and the 24V supplies i will be using but still tweaking the charger box.

And the supply input voltage


_____________________________

Sorry officer i thought the speed limit only applied to people with driving licenses.

Hide Signatures

(in reply to 4*60)
       Post #: 32

RE: Confused as can be with chargers. - 11/12/2012 10:21 PM   
GerKonig


 

Posts: 1489
Score: 191
Joined: 3/5/2005
Last Login: 5/24/2013
From: Levittown, PA, USA
Status: offline 		Any suggestions for a source of power supply? I will be updating to a Power Lab 6 or 8 charger, and my 25A power supply will not bee enough for what I want. I have the one sold by Nitroplanes or HobbyPartz, and tried to buy another one to connect in series, but for a time now they are out of stock...

Any suggestions for a source of power supplies at reasonable prices?

Gerry

Hide Signatures

(in reply to trax de max)
       Post #: 33

RE: Confused as can be with chargers. - 11/12/2012 10:26 PM   
Goldenduff


 

Posts: 932
Score: 114
Joined: 7/15/2010
Last Login: 5/24/2013
From: Aberdeen, UNITED KINGDOM
Status: offline 		This is pretty reasonable- even if like me you're in the uk

www.feathermerchantrc.com/


_____________________________

Hello, the IMAX b6 quattro fits the bill?

Hide Signatures

(in reply to GerKonig)
       Post #: 34

RE: Confused as can be with chargers. - 11/12/2012 10:46 PM   
trax de max


 

Posts: 380
Score: 114
Joined: 10/18/2010
Last Login: 5/24/2013
From: newcastle, UNITED KINGDOM
Status: offline 		The dell servers are pretty good, quite a few people use them. Now that someone has done the hard work, it makes it even better. Just buy and plug in with EC5 connector.
If your handy with a soldering iron, theres a few how to's on the internet. Last time i checked the server supply was £15 on ebay.
I use the playstation3 supplies but until i decide what copter to get they do well for the truck.If i need better then the dell supplies will be ordered.

_____________________________

Sorry officer i thought the speed limit only applied to people with driving licenses.

Hide Signatures

(in reply to Goldenduff)
       Post #: 35

RE: Confused as can be with chargers. - 11/13/2012 12:46 AM   
jamesfarrell


 

Posts: 23
Score: 100
Joined: 11/10/2012
Last Login: 12/29/2012
From: WorcesterMA, USA
Status: offline 		You guys are harcore. I'll be lucky if I even have the time to use my lipo checker I bought, let alone charger hooked up to computer. 

Hide Signatures

(in reply to trax de max)
       Post #: 36

RE: Confused as can be with chargers. - 11/13/2012 4:56 PM   
jester_s1


 

Posts: 3802
Score: 233
Joined: 12/17/2006
Last Login: 5/24/2013
From: Fort Worth, TX, USA
Status: offline 		I'm curious why you're planning to set up two packs in series instead of just getting 5 cell battery packs? Are these some packs that you were given and want to use, or did someone tell you that was the thing to do? You could be saving yourself some aggravation by ebaying those packs and getting the proper 5 cell packs and charger that will handle them.

If you're totally new to electrical stuff, it was really helpful to me to learn to think of electricity like water. The battery is a tank, so you need a charger that can fill the tank. Amps is how much water is coming out like a gallons per minute rating, and volts is pressure- how far the sprayer can shoot the water out. You already know your volts requirement, but it won't hurt to look through your documentation to see if 6 cell packs are ok to use with your truck. It shouldn't be hard to find the amp draw data for your system on various batteries so you know how much C rating you need. As for the original question of a charger, any charger that can handle the voltage of your packs (99% of the programmable ones are 1-6 cell compatible) will charge your packs. To get the fastest charging you need a charger that can put out the amps (water flow) you need at the voltage (pressure) your packs are at. Volts x amps = watts, so a 5 cell pack at 5000 mah (which equals 5 amp hours if no one has explained what mah means) will charge at 5 amps. That's called a 1C charge. Some packs can charge at 2C or even 4C, which gets the job done faster if you want to. You don't have to charge at the maximum speed though, so if your charger is one of the cheaper 50 watt versions it will still get the job done. The water analogy is helpful again here; the tank has a maximum speed it can be filled, but you can fill it slower if you want to. for a 5 cell pack you'll have 21 volts at the max charge (18.5 volts is the rated voltage) so 21v x 5 amps is 105 watts. If you stick with the dual pack setup, the math is 12.6 volts (11.1 volts rated for a 3 cell pack) x 5 amps = 63 watts.

If you want to save some money and don't mind waiting a while longer for your packs to charge, any of the various 50 watt chargers on the market will do the job just fine. And for the question of power supplies, you only need enough amps to do the job you are looking to do. You don't have to have a big enough power supply for the max output of the charger, only for the max amperage you actually plan to draw to charge your batteries plus a little extra to operate the charger. Going the AC/DC route is the most convenient if you want to use household current to do your charging at home, but it's just as good to buy a separate power supply to operate a DC only charger.

_____________________________

For me, an ARF is an airplane that someone else just crashed.

Hide Signatures

(in reply to jamesfarrell)
       Post #: 37

RE: Confused as can be with chargers. - 11/13/2012 5:08 PM   
jamesfarrell


 

Posts: 23
Score: 100
Joined: 11/10/2012
Last Login: 12/29/2012
From: WorcesterMA, USA
Status: offline 		 I'm converting this truck to 1/5 scale, so the 6C will be required to move the thing as it's heavier. I bought the duratrax dual charger, at least it will work for now as I've spent a lot on the truck and the parts as well. I'll tell you this. The HPI Savage Flux HP, with 6C is basically not fun and unusable. Hopefully with the TCS conversion to 1/5 buggy, it will be more controllable. 

Hide Signatures

(in reply to jester_s1)
       Post #: 38

RE: Confused as can be with chargers. - 11/14/2012 6:39 PM   
trax de max


 

Posts: 380
Score: 114
Joined: 10/18/2010
Last Login: 5/24/2013
From: newcastle, UNITED KINGDOM
Status: offline 		theres a new charger in town.
This could be the last charger you'll ever need

_____________________________

Sorry officer i thought the speed limit only applied to people with driving licenses.

Hide Signatures

(in reply to jamesfarrell)
       Post #: 39

RE: Confused as can be with chargers. - 11/14/2012 7:16 PM   
jester_s1


 

Posts: 3802
Score: 233
Joined: 12/17/2006
Last Login: 5/24/2013
From: Fort Worth, TX, USA
Status: offline 		You may have enough wiggle room with your particular power system, but have you considered the increased amp load that more weight is going to cause with the new setup? More volts will cause more amp draw, as will more weight. When you add both you can exceed your limits on a system that was already close to its max and burn something up.

_____________________________

For me, an ARF is an airplane that someone else just crashed.

Hide Signatures

(in reply to trax de max)
       Post #: 40

RE: Confused as can be with chargers. - 11/21/2012 4:11 AM   
chuckk2


 

Posts: 371
Score: 106
Joined: 7/24/2007
Last Login: 5/22/2013
From: Warner Robins, GA, USA
Status: offline 		Watts is watts!
Motors have maximum ratings
Voltage, Current, and maximum power(watts)
If you go too much above any, the magic smoke escapes!
An example might be an E-Flite power 52 motor.
1650 max watts or 2+HP
Max applied voltage is that from a 6 cell lipo.
Max current ~60-70 A, about 55A continuous
590Kv
590x4.2x6=14868RPM unloaded (A bit high) I try to stay around 10-12k RPM to keep propellers happy.
It turns out that the loaded RPM just falls into the 12-13k range with the plane below.
Hanger 9 40 P-51 ARF with a 12x6x3 propeller produces an (E Calc) calculated 1625 Watt load.
GPS indicated speed was between 88 and 91 MPH
Exact weight unknown, specs say 8-10 pounds.  Since the plane has retracts and a 6 cell 5Ah Lipo,
I guess the actual weight is around 10  to 11 pounds. If the throttle is used gently during takeoff,
a 12x8x3 prop might be utilized to pry the last bit of power out of the motor.




Hide Signatures

(in reply to jester_s1)
       Post #: 41

Page:   <<   < prev  1 [2]
All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Confused as can be with chargers.
Page: <<   < prev  1 [2]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


1.297RCU1