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Logo 700xx › LOGO 700 WITH 14S???
12-03-2012 01:32 PM  5 years agoPost 1
luckyhs

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Brasil

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Hi guys,
Have anyone tried the LOGO 700 with 14S, like 3850mah or 4400mah, the 7S 4400mah has the same weight from the 6S 5000mah, i know that the YGE that cames with the LOGO 700 support 14S, i do have the new KONTRONIK 800-480KV, but i don't know if the SCORPION 4525-520 holds 14S.

luckyhs

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12-03-2012 02:34 PM  5 years agoPost 2
Ronald Thomas

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Gainesville, Fl, USA

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Just email Georges and ask. I am running my XXtreme at 16s with the stock motor (380KV) and he said it would handle it with no issues......Ron

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

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12-03-2012 04:21 PM  5 years agoPost 3
Futura SE

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Fayetteville, Arkansas

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The pyro and 7s 4400 is exactly what several of us want to test. No the 4525 can NOT do 14S.

That should be a monster combo.

Team Mikado USA -- Team Insane Canopy -- Team Scorpion -- Team Evo Power Batteries

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12-03-2012 04:26 PM  5 years agoPost 4
maj

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united Kingdom

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I ran all this year with a 4525-520 on 14s with no issues. Don't run beyond your max rpm which from memory is 24k. Also run Pyro 700-45 on 14s and Xxtreme 800 on 15s.

MJ

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12-03-2012 04:36 PM  5 years agoPost 5
Ronald Thomas

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Gainesville, Fl, USA

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If the max rpm is 24K, then:
4.2 x 14 x 520 = 30,576

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

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12-03-2012 04:56 PM  5 years agoPost 6
Futura SE

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Fayetteville, Arkansas

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Regardless if the 4525 can do 14s it can't on a L700. Gearing way out.

Team Mikado USA -- Team Insane Canopy -- Team Scorpion -- Team Evo Power Batteries

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12-03-2012 06:15 PM  5 years agoPost 7
maj

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united Kingdom

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Really? Thought the gearing is 9.21 to 10.29.

Eg 20,000 rpm / 9.21 gives 2171 rpm. I don't think anyone would run 100% throttle on that setup plus factor in load and motor efficiency the fictional 30k soon comes down.

Those gear ratio's are pretty standard in the hobby and I guarantee yield great results on 14s.

Hey if you don't want that setup great but before definitively saying you can't be sure you can't as some members may take that as read who may want too! The thread starter was asking if the 4525 can handle 14s, previous posts would have given him the impression they can't.

I was the leader in higher voltage Xxtreme 800 setups, some critisised others followed as there too are great results to be had.

MJ

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12-03-2012 06:17 PM  5 years agoPost 8
Ronald Thomas

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Eg 20,000 rpm / 9.21 gives 2171 rpm. I don't think anyone would run 100% throttle on that setup plus factor in load and motor efficiency the fictional 30k soon comes down.
Comes down 33%????

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

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12-03-2012 06:24 PM  5 years agoPost 9
maj

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united Kingdom

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Do you run your Xxtreme at 100% throttle? Your over running it then at 26k.

It just doesn't work like that. You set a headspeed a % of throttle is given to achieve it. The gear ratio is fixed so at 2100 on 14s you will run about 20k on motor. As load changes more or less power flows to hold rpm but still spinning the same rpm.

The main question is are you going to get decent efficiency out of your setup. On those gear ratios yes you can.

MJ

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12-03-2012 06:26 PM  5 years agoPost 10
Ronald Thomas

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I understand how it works but at 30K, I thought you were close to the ragged edge under load

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12-03-2012 06:33 PM  5 years agoPost 11
maj

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united Kingdom

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No just more been fed to motor to hold rpm. Working harder more torque. If you think if the motor had to turn quicker under load rpm would constantly change as the gear ratio is fixed.

It's worth a try if you have the kit on the smallest pinion but if you were putting a combo together for 14s you would run a lower KV motor.

MJ

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12-03-2012 07:02 PM  5 years agoPost 12
heliaddict2424

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SCV SoCal.

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WHY???

Team MikadoUSA Team Scorpion

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12-03-2012 09:41 PM  5 years agoPost 13
KC

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WA

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Why? why not...

loaded: 14 x 3.5 x 520 = 25,480rpm,

30,000 / (520 x 14) = 4.12 Volts...damn near unloaded, and governed will be below 30k rpm.

if you found a 14s combo that is lighter than 12s and has the same V x C x mA figure....

"VCmA" just means if a 12s 45C 5000mA battery weighs 2 kg and you found a 14s 3850mA 45C that weighs less than 2 kg....go with it because 14 x 45 x 3850 = 12 x 45 x 5000

Its not always that simple, but two kinds of same C batteries from the same manufacturer can be simplified to that.

Let us know if you run the 4525-520 on 14s...I say go for it

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12-03-2012 11:24 PM  5 years agoPost 14
luckyhs

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Brasil

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What to do?
Guys,

Some of you said that SCORPION 4525-520 could hold 14S and some said that couldn't hold 14S, i tried to contact George with no answers at all, so if anyone have a better contact with George from SCORPION, please ask him, i think he could solve this problem for all of us.
My KONTRONIK 800-48 is here, if the Scorpion couldn't hang 14S.

Luciano

luckyhs

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12-04-2012 07:25 AM  5 years agoPost 15
taosgraveyard

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Connecticut

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I too have a pyro 800-48 looking for a Heli

Might go logo 700 when its available unbundled

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12-04-2012 07:24 PM  5 years agoPost 16
KC

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WA

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Try reposting as '4525-520 with 14s???' in the main discussion so people that have experience with that motor will see your question.

The logo forum is real slow and the 45- series motors have been around longer than the Logo 700, you'll have more luck in the main discussion

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01-03-2013 01:04 PM  5 years agoPost 17
stocksy

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england

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Im in the same situation want to try 14s and as Maj has said that motor is ok on 14s if kept below 24,000 rpm scorpion has confirmed this with me.

With Kosmik mode 4 14s 17t

Throttle 60%: 1740
Throttle 65%: 1885
Throttle 70%: 2030
Throttle 75%: 2175
Throttle 80%: 2320
Throttle 85%: 2465
Throttle 90%: 2610

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01-03-2013 03:07 PM  5 years agoPost 18
rexxigpilot

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Florida

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The logo forum is real slow and the 45- series motors have been around longer than the Logo 700, you'll have more luck in the main discussion
Is that supposed to be a joke? Logo forums are not slow on this or the other RC heli websites.

You will not get a LiPo at 3.5V under typical hard 3D flying load. It will be more like 3.7+V unless you are referring to voltage at the end of the flight or the batteries are way past time to replace them.

A kV of 520 will work OK with the right ESC. YGE, Kontronik and even CC will work fine at 2050+ RPM headspeed using 17t pinion and stock 175T main gear. That puts true throttle (ESC output) between 70 and 80% during the flight under load.

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01-04-2013 08:16 AM  5 years agoPost 19
KC

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WA

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rexxigpilot...I posted that remark a month ago....

3.5/3.7 = 0.945....a 5% difference.

V x kV / esc numbers is the paper way of figuring things.

to go one further step in making an educated guess:

mechanical efficiency losses are 5-10% edpending on blades, angle, blah blah blah. I pick a "safe" value rather than to bother with splitting hairs.

3.5 is 5% high (safe side est)...3.7 might be true voltage, but it would take me a lot of napkins to calculate things to a degree that would impress even you.

Like I said before, that motor series has been around longer than the Logo 700...would be smart to ask around.

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01-04-2013 01:28 PM  5 years agoPost 20
MrMel

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Gotland

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Sidenote: "only 5%" is whole 3v on 14s, it's not "only", its almost a cell difference.

Anyway, 520 motor on 14s is too much, you could try to make a small enough pinion but in the end you will just strip gears etc, if it even works on 8 mm shafts.

I will try something like a 4530-450 motor in mine on 14s.
It should be pretty much drop in replacement on the existing pinion and gearing (I like to fly it as intended at 1950ish)
I just want longer flighttimes.

There is no off the shelf Scorpion for it, but if you email them I'm sure they can make one for you if needed.

Note: Pyro 800 on 14s for the Logo 700 does not work as the YGE has a limit on the Pole count (132.000 for 2 pole) which puts the high pole pyro in a bad spot.

Now I just have to figure out which sized pack to balance it all etc.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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