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Richardmid1

rrProfessor

Leeds, England

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Current!!

60% of the time, it works every time!

08-26-2016 05:44 PM
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Ace Dude

rrProfessor

USA

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So if you have I and you know E, please solve for R.

  

08-26-2016 05:54 PM
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ICUR1-2

Key Veteran

Ottawa, Ontario

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I'll say it yet again but in slightly different words 5000mah 6s and 5000mah 12s flown the same way I. E. Same flight time will have equal strain on the packs
I don't believe that or nobody would go above 6S

spending time, paying attention

08-26-2016 05:56 PM
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LaDon

Veteran

Fort Dodge .Ia

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I am kind of thinking he can't

Team Jr

08-26-2016 06:13 PM
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Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Current!!
Same heli, same flight, 6s vs 12s, the 12s setup will have less strain on the each pack/cell. 12 cells pulling 120 amps equals 10 amps per cell or 60 amps per pack. Same heli pulling 120 amps on 6s is 20 amps per cell so "harder" on the pack.
Of course you cannot compare any 6s setup vs any 12s setup unless they are in identical setups doing the exact same routine. Then still you will require different electronics/gearing/amperage draws....

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

08-26-2016 06:54 PM
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Heli_Splatter

Key Veteran

Silver Spring, MD by way of Sidney, Ne - USA

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What I have learned has taken many years. Wiring stuff as a kid, building systems, 3 years of EE in college, and several years of DC flight in model aircraft, and ham radio. I can't put it in any one article, paragraph or book. I have learned to have more of a feel of things than just the numbers. It is not always just a formula, it is trials and failures. Getting up in the morning and still touching the ground (and not sparking).

Everything you need to know can be learned at low power 3s and moves up to 6&12s. You just have to be careful. I have a lot of success by paying attention to the details. I smoke my failures.
Heli splatter I have always been interested in the high voltage packs. I just haven't looked into them enough to completely understand what all I have to do to run them and charge them. You should do a review on them with as much important info as you can put in there

08-26-2016 09:45 PM
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Richardmid1

rrProfessor

Leeds, England

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. I'll say it yet again but in slightly different words 5000mah 6s and 5000mah 12s flown the same way I. E. Same flight time will have equal strain on the packs
PLEASE read this again guys!

It IS correct!

I TOTALLY understand that doubling the voltage halves the current for the same power output. I stated the pack Ah being the same in both setups (5000mah). I also said same flight time so let's use 4 minutes to make it easier. 4000mah used (80%) is 1000mah/min or 60Ah...... IN BOTH SETUPS!! Both helis pulling 60A average current from 5Ah!

What you guys are saying is that I should be getting twice the flight time on my 12s 5000 700 than I do on my 6s 5000 logo 550!!!

60% of the time, it works every time!

08-27-2016 07:16 AM
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Ronald Thomas

rrMaster

Gainesville, Fl, USA

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I am not, I am saying the strain on the packs is much less on the 12s setup since you are pulling less average on average per pack on the 12s setup vs the single pack of the 6s setup. The thread was about 30c vs 50c and which pack would see a difference...

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

08-27-2016 11:22 AM
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ICUR1-2

Key Veteran

Ottawa, Ontario

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I am not, I am saying the strain on the packs is much less on the 12s setup since you are pulling less average on average per pack on the 12s setup vs the single pack of the 6s setup.
And I agree with this as well.
The thread was about 30c vs 50c and which pack would see a difference...
which unless he was already in need of 30C min, then a 50C would land cooler at end of flight and the batteries would last for more cycles.

so why the arguements

spending time, paying attention

08-27-2016 01:08 PM
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Richardmid1

rrProfessor

Leeds, England

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. I am saying the strain on the packs is much less on the 12s setup since you are pulling less average on average per pack on the 12s setup vs the single pack of the 6s setup.
Damn, I better rush out and get a 200+ amp esc for my 550 then?!
. so why the arguements
Ide like to keep it more of a discussion! This topic of mine started the whole 'discussion'
http://rc.runryder.com/helicopter/t810620p1/

No where in any of this have I said that C ratings don't matter, my 'discussion' is about how a 50C pack is more like 30C and a 20C pack may actually be 25-30C! Of course I have no proof other than my experience and the C rating calculator site I posted and the fact in 10 years on RR and other forums plus friends findings have I seen low enough IR readings to make more than 30C.

60% of the time, it works every time!

08-27-2016 01:55 PM
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Ace Dude

rrProfessor

USA

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Perhaps you can use eCalc to demonstrate the phenomenon you're referring to:

http://ecalc.ch/helicalc.php?ecalc&lang=en

  

08-27-2016 02:05 PM
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Richardmid1

rrProfessor

Leeds, England

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As you can see the battery load is the same (actually slightly lower on the 6s but I wouldn't want to split hairs now would I!)

Let the hair splitting begin!!

60% of the time, it works every time!

08-27-2016 03:56 PM
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Ace Dude

rrProfessor

USA

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There were no numbers needed. I'll say it yet again but in slightly different words 5000mah 6s and 5000mah 12s flown the same way I. E. Same flight time will have equal strain on the packs.
As you can see the battery load is the same (actually slightly lower on the 6s but I wouldn't want to split hairs now would I!)
How come your analysis isn't using the the same flight time in each scenario?

  

08-27-2016 04:37 PM
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Richardmid1

rrProfessor

Leeds, England

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Min flight time is the same. Why mixed and hovering flight times differ is to do with the difference in physical weight of the models and disc size etc. Also the variance in head speeds, governor overhead, motor efficiency at different throttle outputs etc.

I could always increase the head speed on the 12s setup to make the flight times equal but that would increase the load on the packs!

60% of the time, it works every time!

08-27-2016 05:02 PM
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Ace Dude

rrProfessor

USA

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Min flight time is the same. Why mixed and hovering flight times differ is to do with the difference in physical weight of the models and disc size etc. Also the variance in head speeds, governor overhead, motor efficiency at different throttle outputs etc.
Wasn't asking about that. You stated:
5000mah 6s and 5000mah 12s flown the same way I. E. Same flight time will have equal strain on the packs.

  

08-27-2016 05:20 PM
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Richardmid1

rrProfessor

Leeds, England

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. Wasn't asking about that.
WTF?! Yes you were!

Look I've proved my point, this is clearly about you simply not liking me for some reason so im done here. I'm obviously not going to get an apology from you.

See ya guys.

60% of the time, it works every time!

08-27-2016 05:30 PM
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Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Your numbers appear to be ok but the 12s setup doesn't break that load down into two packs. So the 12s setup has less "strain" on the packs...

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

08-27-2016 06:03 PM
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LaDon

Veteran

Fort Dodge .Ia

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I can read that on my phone it is too small but is that with the same size Heli and on set up for 6s and one for 12s? If not and one is a 700 and one is a 500 or 550 then it means nothing. Ron is talking same size helis with the only difference being maybe the kv of the 550 upped to have the same performance capabilities for the 6s setup. Otherwise the comparison means nothing

Team Jr

08-27-2016 10:27 PM
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ICUR1-2

Key Veteran

Ottawa, Ontario

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try the comparison with 2 600's the 12S will be about half the amps required compared to the 6S

we can't trick OHM's law

spending time, paying attention

08-27-2016 11:06 PM
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LaDon

Veteran

Fort Dodge .Ia

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Exactly. Apples to apples

Team Jr

08-27-2016 11:07 PM
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