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Old Dec 14, 2012, 05:23 PM
I did it...
av8ersteve's Avatar
Morganton, NC
Joined Jun 2005
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Thanks for the help. I understand a lot better now.

One other question I keep forgetting to ask you guys. Did any of you wind up with 2 extra screws after your build? Mine is ready to fly, as far as I know, but there are 2 screws left over. They look like the ones that attach the control horns only longer.
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Old Dec 14, 2012, 05:28 PM
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Australia, VIC, Melbourne
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Oh.. I am using CS10's... and they use a bit more power than a stock 6 blade would use. I reckon as much as 10% more.
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Old Dec 14, 2012, 05:32 PM
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I had the two screws left over as well. They were from the rudder hardware pack.

I think they were there incase the two shorter screws weren't long enough for the control horn backplates.
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Old Dec 14, 2012, 06:06 PM
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As Pete points out, Heat is a good indicator. If you ever took Chemistry, its similar to those Super Saturation Enthalpy lab experiments.... as the compound gives off electricity it also generates heat, too much it breaks down internal bonds of the remaining paste. Early voltage drop is also a good indicator as well re battery health.
Trouble to is some batteries receive cooling which make them perform better but still past there limits. So keep within the math.

You're asking the question and we're turning it into a science lesson Take a look back at the Battery List that was posted earlier. It has a few vid demos of 25C batteries with this model.

Since you're flying stock, start looking to land as said around 3 min. Try not to peak the throttle at this point, just easy final circuits to home. 2 min if you are getting used to the model and need hard power to recover 2 or 3 botched approaches; one too many times and you may have a puffy battery.

And Pete as I pointed out I only use the 5800 30C for recon. They are too heavy to bother trying to use them 3D though they did do this fine the first few minute. Basic easy flying, testing etc because it has a longer flight time option where my level flight cruise drops to 2x27amp or about 5min. Otherwise its the GenAce 5300 30C or Genesis 5500 55C.
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Old Dec 14, 2012, 06:28 PM
I did it...
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Morganton, NC
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GenAce 5300 30C or Genesis 5500 55C.

How much flight time do you get out of these 2?
Thanks
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Old Dec 14, 2012, 06:36 PM
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Quote:
Originally Posted by av8ersteve View Post
GenAce 5300 30C or Genesis 5500 55C.

How much flight time do you get out of these 2?
Thanks
Go watch the vids from the battery list I just posted. Some of them with those batteries are unedited. So based on that persons flying you can see if they were hard on the throttle or easy and when they decided to land.

Those batteries I posted many found idea for 3D not as much length of flight. Generally average flight everyone pushes close to 4 min give or take.
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Old Dec 14, 2012, 09:42 PM
Should've, Would've, Could've
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Max's 'comprehensive battery list' has got to be one of the best thread specific (although you can use it for other jets) I've seen put together.
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Old Dec 15, 2012, 02:53 AM
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I'm fortunate to have both the su-35 & euro fighter(both freewing), I would appreciate if someone could let me know which battery would work with both aircraft? Just trying to save a few $$ & not have a heap of batteries. Thanks
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Old Dec 15, 2012, 07:44 AM
Should've, Would've, Could've
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Hmmm...

Gforce elite 5000mah 40c (778g) & 60c (788g) and Gens Ace 5300mah 35C would be my 1st choice for both aircrafts. I use 4000 & 4600mah Gens Ace on my euro strictly and 5000mah + on my SU, so maybe someone else would go bigger but these are perfect for both... you will need to shave a lil foam on the euro battery bay though.

Gforce elite 5000mah 40c

http://www.valuehobby.com/power-syst...2-2v-lipo.html

Gforce elite 5000mah 60c

http://www.valuehobby.com/power-syst...h-6s-lipo.html

Gens Ace 5300mah 30c

http://www.hobbypartz.com/98p-30c-5300-6s1p.html
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Old Dec 15, 2012, 09:06 AM
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I've been using the Turnigy nano-tech 5000mah 6S 25~50C Lipo in my stock Su with no problems (CC ESCs though). I did have to add about 1 ounce of lead to the forward nose gear compartment for balance though.

Flight time is 4 minutes with my landing sequence beginning at 3:30. No LVCs yet with the ESC LVCs set to 3.2V per cell.

http://www.hobbyking.com/hobbyking/s...arehouse_.html
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Old Dec 15, 2012, 09:21 AM
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WWhiskey, how many flights have you had with those and do you have any flight video that I can add to the demo list?

I used to use my 5000 40C on my Euro when it was on 6S Zippy and Turnigy and I've slightly puffed two of them with my LVC at 3.4V. And the Euro stock is pulling around 86 amps so its not as hard on it as the 100amps off the SU.

They do it for the first 10 or so flights but they start to slowly drop off if you pushed them. They fly fine but don't take abuse the same.
Mind you, again it depends on if you're pushing them 3D hard or just easy as I just described using my 58
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Old Dec 15, 2012, 11:23 AM
Should've, Would've, Could've
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United States, CA
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Max the link wasn't showing up right on my side I'll repost again.

Gforce elite 5000mah 40c

Freewing Su35 Airbrake PICT0004 (5 min 23 sec)
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Old Dec 15, 2012, 11:32 AM
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Morganton, NC
Joined Jun 2005
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Now those Gforce 5000, 60C looks like a good price. Are there any worries of puffing those on a stock set-up SU or Euro? Looks like you would be able to push those as hard as you liked without having to worry (stock set-ups that is).
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Old Dec 15, 2012, 11:36 AM
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Thanks V8. Will do once I'm in front of a PC.
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Old Dec 15, 2012, 12:28 PM
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Ah, AV8r you can puff any battery if you run it down too far. Or if it can't deliver the amp demand asked for you can toast it.
The 25C will work as you see it in several of the posted vids because it can produce 25amps more than demanded.
A 5000 60C produces 300amps, 3 time your demand. So it will deliver 100 amps even to depleting it to 1600mAh.
So you could either fly it for 5+ min low throttle or hard for almost the entire 4 min.
Because only you know how hard you'll fly, you have to calculate what your battery choice will do and for the health of the battery, not over stress it by flying beyond it capacity.
Thus the general comment.... 40C+ 4500-5000 will handle most all average flying for 4 min (that's including safty) for batteries around 750g-850g. That's why the battery list is so long.
However some complain running batteries down past limits because they never really calc demand, mAh against capacity and C rating.
And price isn't always a good indicator because you can misuse very expensive batteries just the same but not all lipo formulas are equal. Some do have better energy density.
So don't mix up what will work, cause they all will if they poduce over 100 amps, with what will do for your flying vs what is the best, vs value.
I put the list together with links to all the vendors on each for any to quickly find what suites them and then search for the latest bargain. Keep in mind that lipos are batch recipies. I have puchased cheap and pricy brands where one batt performs great, the other crap. When that happens more with certain brands you usuall find they also exaggerated their C count rating.
Because few try several different batteries on the same setup and fly all different ways, I created the list to actually show how they do, for what kind of flying for however long.
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