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Old Dec 20, 2012, 07:41 PM
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United States, CA, Sebastopol
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Originally Posted by Ducati Mechanic View Post
Man I love parallel charging! What used to take all night, now only takes a few minutes! If you guys haven't made the jump to the para- board it's the only way to go..
Yep... a really nice step ahead for the hobby for sure.
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Old Dec 20, 2012, 08:05 PM
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USA, NE, Waverly
Joined Feb 2011
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Tim,

I have the 3010 model with a1000 watt PS and have been parallel charging for over a year.
I even do my 6S batteries for my 60" EF planes. Nice to put it at 30A and have all three batteries done in 18 minutes. The only way to go!!!!!

I charge (6) 460mah at a time also, at 8.3 amps they are done in 18-20 minutes (both examples = 3C charge rate) = that is some serious flying. I can charge at 5C if I need them in 10 minutes.

For all you out there without a para board, many places offer a 3 into-one cable. Or make your own cheaply. Most 10A (50 watt) chargers can easily handle (3) 460 mah batteries at a time at approx 3C. 4.2 x 3 x 1.38 x 3 = 52 watts, or charged at 4.1A

Just remember, all batteries must be the same cell count (Ex.: 3S). You set the voltage the same and add the currents.

Example: You have (5) 460mah lipo batteries that you want to charge at 3C rating (assuming that your batteries will handle that high of a charge rate). The calculations are as follows:
Set charger for 3S lipo (11.1 volt)
460mah/1000 = .46 amps
At 3C (.46 x 3) = 1.38 amps charge rate each.
1.38 x 5 batteries = 6.9 amps is the charge rate you will set on the charger.

Simplified = (.46 x 3 x 5)

To do (6) batteries at 2C rate (approx. 1/2 hour charge time) = .46 x 2 x 6 = 5.5amps.

When I do (3) of my 6S 3300mah packs at 3C, it goes like this:
3.3A x 3C x 3 batteries = 29.7 amps (4.2v x 6cells = 25.2V x 29.7A = 749 watts).

Another example: I'm flying my 12S 700 size electric heli, using two 6S packs at 5000mah each. What is the maximum "C" Rate I could charge these at and stay within the 30A, 1000watt rating of my charger?
Watts = Volts x Amps. Maximum charged voltage of a 6S pack is 25.2 volts (4.2 x 6).
1000w/25.2 = 39.68 amps, that is over the chargers rating of 30 amps.
30A x 25.2V = 756 watts, well within the wattage rating
30A/2 batteries = 15 amps each. 5000mah/1000 = 5A. 15A/5A = 3C charge rate.
You be ready to fly in approx. 20 minutes.

Have fun, and be safe,
Ric
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Old Dec 20, 2012, 08:22 PM
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Charlotte, NC
Joined Jan 2011
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Originally Posted by Dannyboy85 View Post
Just curious I downloaded the 540qq file for my DX8 and the travel for elev and rudder are already at 150% who is running 150?
I'm on 150 for both.
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Old Dec 20, 2012, 08:33 PM
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the dx6i only goes to 125%.......boo hoo...wa wa
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Old Dec 20, 2012, 08:37 PM
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Originally Posted by dalecheek1 View Post
the dx6i only goes to 125%.......boo hoo...wa wa
You better ask Santa for a DX8 then.
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Old Dec 20, 2012, 08:41 PM
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Originally Posted by dalecheek1 View Post
the dx6i only goes to 125%.......boo hoo...wa wa
But you can also adj the Dual rate limits to 125%, can't you?
That's over 150% total
Travel Adj 125% x DR 125% = 156%
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Old Dec 20, 2012, 08:50 PM
24 yrs. of Aircraft flying
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United States, GA, Rockmart
Joined Oct 2004
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Originally Posted by turnerm View Post
Dude - that's some beautiful land you've got to fly on. I'm jealous!!

I swear, the next house I build/buy is going to be on some land just like that and I can walk out in my backyard butt-ass naked and fly if I want!! Good thing for you guys I keep the camera on my head I suppose...
Thanks me and dads lucky to have such a spot to fly. As you see its wide open ,free, .8th a mile from my current home n only 7 mile from, dads. He keeps grass cut we can fly pretty much anytime we want there is 4 ama tables a picnic table under a nice sheld
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Old Dec 20, 2012, 08:52 PM
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Originally Posted by turnerm View Post
You better ask Santa for a DX8 then.
santas HELPER put me on to a panasonic pocket cam and hat,,,for xmas,,,then i can post vids of my adventures with flying my AIR ..O...BATIC PLANES.... I got sum MAD SKILLS....my THUMS will back up my MOUTH,,,MY BIG MOUTH.........................
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Old Dec 20, 2012, 08:56 PM
Some.. call him Tim...
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United States, TX, Austin
Joined Oct 2008
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Nov8r,

Yeah man that's what affords me the ability to fly ten cell with my 78 inch Extra. I can slam four 4400mah 5s packs, fully charged, at the field, in less than an hour.. Same thing with four 6s 3600's that I fly in the 64" MXS..

I'm not even pushing the C rating doing them in that amount of time. I like to keep the equipment cool. I usually charge between two, and four C..
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Old Dec 20, 2012, 08:56 PM
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Originally Posted by N_O_V8_R View Post
But you can also adj the Dual rate limits to 125%, can't you?
That's over 150% total
Travel Adj 125% x DR 125% = 156%
did not think of that ...will give it a try ,thanks dr only goes to 100% dx6

i
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Old Dec 20, 2012, 09:17 PM
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It'll work.
Just set your Travel Adj. to 125%
Than keep adding DR till the servo arm stops traveling - no need to go further.
You should end up with approx. 120% DR, which will give you 150%.

FYI - 100% Total = +/- 30° throw. 150% = +/- 45° throw at the servo.
Most servos have max. endpoints set at +/-45°.

One other note, most you might already know, you ALWAYS want to use up all the servo throw that is available.

That means use 150% if you can. Why?, resolution and mechanical advantage.

If 150% is too much, move links outward on horns, or inward on servo arms, until you get the desire control surface travel.

Everyone keeps talking about getting longer servo arms.
Isn't there a hole farther down on the Ele & Rud horn? (Drill one in there if there is room)
(mine hasn't arrived yet, so I do not know if the extra hole is available).

Torque is torque and MA is MA, doesn't matter how you get there, unless you run into clearance/interference problems. (Ex.: a 2" servo arm hooked to a 2" control horn is still 1:1....doesn't matter if it is 1" connected to a 1", still 1:1 MA
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Old Dec 20, 2012, 09:22 PM
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Originally Posted by dalecheek1 View Post
did not think of that ...will give it a try ,thanks dr only goes to 100% dx6

i
you are probably correct on the Dx6, but I thought my Dx6i had 125%
Dx7's have 150% Tr-Adj and 125% DR
Haven't had a servo I couldn't MAX out yet with my Dx7
but I really like the DX8 and my Dx18QQ.
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Old Dec 20, 2012, 09:42 PM
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Man you young pups really know how to hurt an old man. All this talk about 150% throws. I run 60-70% and the guys at our club are amazed at the response and roll rates this thing has. I couldn't begin to think what 150% would do. I suppose it has to do with 3d stuff, and we don't have any 3d flyers at our club, so nobody knows any better I suppose. I begin to wonder if anybody else just flies regular aerobatics with this thing or if everybody that has it but me is a 3d flyer.
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Old Dec 20, 2012, 09:49 PM
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Originally Posted by N_O_V8_R View Post
you are probably correct on the Dx6, but I thought my Dx6i had 125%
Dx7's have 150% Tr-Adj and 125% DR
Haven't had a servo I couldn't MAX out yet with my Dx7
but I really like the DX8 and my Dx18QQ.
tr adj at 125% dr will go down from 100 but not go past ...thanks anyway.....get pretty tight back and front loops with 125....150 % and plane would bite it s own tail....................
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Old Dec 20, 2012, 09:53 PM
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Originally Posted by bobly View Post
Man you young pups really know how to hurt an old man. All this talk about 150% throws. I run 60-70% and the guys at our club are amazed at the response and roll rates this thing has. I couldn't begin to think what 150% would do. I suppose it has to do with 3d stuff, and we don't have any 3d flyers at our club, so nobody knows any better I suppose. I begin to wonder if anybody else just flies regular aerobatics with this thing or if everybody that has it but me is a 3d flyer.
put MOOOORE throw s on your plane......then U will B THE OLD TOP GUN at your club.......................
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