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03-24-2016 05:06 PM  3 years ago
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imranrajputt

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PK

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ESC selection
Dear friends i am looking ESC for my 700 heli which one is better
1 Castle HV 160A
2. Scropion 160A
3. Hobbywing 200A platinum pro
Thank You
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03-24-2016 05:20 PM  3 years ago
niyot

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Baltimore, Maryland

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They will all basically do the same job. Castle has an online interface, Hobbywing has a program box- I believe you can also program thru audible tones from the esc using your transmitter. I cant comment much on the scorpion since I have not used one lately.Hood HeLi : RIP Roman
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03-25-2016 04:19 PM  3 years ago
newbheliusr

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You guesss

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YGE is a good choice, but it's rather spendy. I'd probably choose the hobbywing or the castle, I don't have any experience with the scorpion esc's. Hobbywing has a very good rep.
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03-25-2016 04:36 PM  3 years ago
wc_wickedclown (RIP)

rrProfessor

long beach calif

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1 Castle HV 160AInsha Allah made in america
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03-25-2016 05:00 PM  3 years ago
mr dan

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Stockton Calif

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Hobbywing"R.I.P Roman" Citizen 0094 in the Nation
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03-26-2016 05:57 PM  3 years ago
Heli Fanatix

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Fountain Valley, CA

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Before the newer Hobby Wing PRO 200A came out, I'ld opt for YGE. But that is to answer your question,

Here is Something I like to share:
Going into this hobby, I knew little about ESC. But I did knew I needed:
- excellent GOV
- ease of setup
- solid BEC (yes, in an HV version)
- integrated components

I wanted to put my focus on flying, not tunning. To be fair, my flying wasn't enough to perform the necessary maneuver to successfully tune the model. My flying was so bad I shut down ESC's. So i wanted to invest in an ESC that will let me plug -n- play and ease of installation in the beginning and something i will never outgrow.

- simple
- powerful
- light
- efficiency
- freewheeling
- solid internal BEC
- shock and water proof*

If the first thing that pops in your mind is the price tag and you can not over look that particular point. Than do an extensive research on ESC and BEC to understand what you need to know. Once you have knowledge .... Than you can make an inform decision.

It used to be, you gotta pay to play but thanks to Hobbywing .. Their ESC is darn good and evolved real well. Almost as though they bought Special K and "Mega Tron" it .. LOL.

Let see if anyone gets that!?!
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03-26-2016 06:48 PM  3 years ago
ticedoff8

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Morgan Hill, CA. USA

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Castle or Scorpion.
Either one has good support and worentees.

If you mess up and fry or crash a CC, they will sell you a replacement at 1/2 the retail price. And, they are constantly adding features through software updates. They also include coupons for a free Castle link USB adapter and a lockout plug.
+ > ÷
Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!
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03-27-2016 12:04 PM  3 years ago
EEngineer

rrProfessor

TX

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freewheeling
Only Kontroniks and YGE using active freewheeling....the others mentioned use passive freewheeling.

Freewheeling is slang for a either a diode(passive) or a FET(active) that is used to "snub" the voltage spike that occurs when the motor coil's magnetic field collapses during commutation.

A diode is OK, but by using a FET(whose "on" resistance is in unit of milliohms), less power is dissipated in the freewheeling device...less heat.

Also, a FET can be precisely controlled as to when to turn on/off....

So that in the case of the Kontroniks, there's no need for "motor timing" setup...the active freewheeling allows the ESC electronics to determine the optimal timing for what motor you are using.

FWIW
Logo 600SXs, 800XX, TDR IIs
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03-27-2016 01:01 PM  3 years ago
mr dan

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Stockton Calif

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I believe hobbywing is an active freewheeling as well."R.I.P Roman" Citizen 0094 in the Nation
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03-27-2016 05:59 PM  3 years ago
Aaron29

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USA

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"Active freewheeling" almost sounds like an oxymoron. I still don't get it.
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03-27-2016 09:59 PM  3 years ago
artimus

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Buckley WA

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What makes Kontronic esc so expensive? I understand the quality of German engineering and manufacturing, but they seem to make a big jump in price over other esc's. I just saw one selling for $900!!!Fly Hard......Team Viagra
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03-27-2016 11:19 PM  3 years ago
Heli Fanatix

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Fountain Valley, CA

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Kontronik has the quality I had describe in my previous post on this thread.
HELI JIVE & POWER
- The rubber resin outer case version are waterproof & shockproof
- It is a very unbeat-able combination ..about the only bad thing is the price

The newer Kontronik's is the Kosmik are in the $700 ~ $900 price tag

ACTIVE FREEWHEELING is a feature of the ESC that will allow the ESC to operate at partial lower throttle range.

ESC without freewheeling
- like to be closer the the wide open
- typical in the 75% ~ 90% Range

ESC with freewheeling
- can be operated 60% ~ 90% Flat Throttle Curve
- b/c ESC can operate on partial load

Typcially ESC's with freewheeling offer very good GOV function.

sorry but CC don't make it on my list .. haven't had good luck with them. And here is a thread pertaining to their warranty / exchange program:

https://rc.runryder.com/rr/pm.htm?show=14035369
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03-28-2016 11:14 AM  3 years ago
EEngineer

rrProfessor

TX

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"Active freewheeling" almost sounds like an oxymoron. I still don't get it.
I'll try to explain.

No matter what application, an energized motor coil.....a solenoid coil....and actuator coil...etc....creates a magnetic field within it....when it's current flows.

When the voltage source is interrupted, the energy stored in the coil's magnetic field will result in a momentary voltage "spike"...except the voltage "spike" is in the opposite polarity.

This effect is commonly referred to as "back EMF".

ALL coils have this characteristic....it's the physics.

Depending upon the coil's application, this back EMF voltage spike can be > 10x the voltage that's used to energize the coil.

This becomes more of an issue when the coil's current is great....as in the case of one's ESC....electrically "commutating" the coils of one's brushless motor.

For decades, a common way to "snub" this back EMF voltage "spike" is to use a simple diode....oriented such that it's cathode is connected....in parallel...to the positive voltage source that is use to energize the coil.....

When the coil voltage source is applied, the diode does not conduct any current...since it is "reversed biased".

But....when the coil is de-energized, the back EMF voltage spike...being of opposite polarity, is now "forward biased"...and conducts the current of the coil's "collapsing magnetic field.

This diode must be used when the back EMF's voltage spike is > than the reverse voltage of the transistor/FET that's used to energize the coil.

Or the transistor/FET can be "fried".

The use of this diode is commonly referred to as a "freewheeling" diode....as the back EMF current is "re-cycled" around the diode/coil circuit until it dissipates.

Now, with regards to ESC's and brushless motor coils....

The back EMF voltage spike generated is > 10X the voltage driving said coil.

The ESC FET's used to drive the brushless motor coils cannot tolerate the back EMF voltage spike with an opposite polarity or they will "fry".

A freewheeling diode mechanism must be employed.....a capacitor is useless to solve this specific issue.

Depending upon expense, there are a variety of brushless motor "drive" FETs that have "built-in" freewheeling diodes...so save PCB space.

These are passive diodes which in this application are referred to as "passive freewheeling" diodes....

There are two main limitations of "passive freewheeling" when used with a brushless motor controller.

1) The diode can't be controlled to conduct/not conduct at a precise time.

2) When conducting, a diode consumes current...and dissipate this in the form of "resistive heat".

Passive freewheeling runs hotter....can't be precisely timed to turn on/off.

Which leads to "active freewheeling".

Instead of a passive diode, another FET can be used in place of a diode. This is active freewheeling.

A FET can be turn on/off with precise timing....and....it's "on" resistance is very much < than that of a diode.

Active freewheeling....less "on" resistance/runs cooler.....can be turned on/off with precise timing.

More circuitry, more ESC software....more expense.

In addition, using a Kontronik ESC, one doesn't need to worry about one's optimal "motor timing"....as one does with a passive freewheeling ESC.

The Kon will automatically determine the optimal timing for your motor's commutation.....less hassle.

FWIW
Logo 600SXs, 800XX, TDR IIs
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03-28-2016 04:05 PM  3 years ago
Jim Cimino

rrKey Veteran

NE Pennsylvania

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The new Commander Series from Scorpion has worked well for me. I have them on two of my heli's, they run cool, automatic timing is recommended and the governor mode seems to work well. Very easy to set up via the included IR card or you can purchase a cable and do it from a computer.Team Synergy, Team Scorpion, No good deed goes unpunished
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03-29-2016 11:50 AM  3 years ago
Richardmid1

rrProfessor

Leeds, England

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You could save a ton of cash and get a 120?! Castle Talon 120 looks good!

IF you fly at 2100+ rpm and like to stick bang AND fly in a hot climate, you may need a 160 but it's debatable.... as you will see shortly!
60% of the time, it works every time!
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03-29-2016 12:02 PM  3 years ago
DemetriusUSN

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Virginia Beach, Va USA

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I'm a sport flier and the Talon 120hv with the fan has done me well. My buddy has flown mine in hard 3d and they perform well. You can't beat the Talon 120hv and I run my bec at 8v....performs well!!Minicopter Triabolo 700, Minicopter Diabolo 700, Minicopter Diabolo 600, Minicopter Diabolo 550, Goblin 770, HD 750, HD Cell 500
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03-29-2016 04:43 PM  3 years ago
artimus

rrKey Veteran

Buckley WA

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EEngineer, thanks for that explanation.I gett it now. I do have a couple of Jazz 55-10-30 controlers that have served me well over the years. I just wish I could afford more.Fly Hard......Team Viagra
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03-30-2016 11:14 AM  3 years ago
EEngineer

rrProfessor

TX

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EEngineer, thanks for that explanation.I gett it now.
It's a "trade off" of expense.

There's nothing wrong with using "passive" freewheeling....

Was just trying to explain the technology.

And now, with brushless servos, at least.....the servo manufacturers should employ motor FETS that at least have "built in" passive back EMF diodes.

But, as consumers, we have no clue of what is in a servo...unless we take it apart and perform an analysis.

Art, there must be standards that we all can depend on so that we all can create our individual "power budget" for our "avionics".

But the servo manufacturers are very "vague".

Which is BS.

With adequate data, we can reliably choose the proper SBEC to meet our individual situation.

FWIW
Logo 600SXs, 800XX, TDR IIs
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