Adding a capacitor to the Turnigy Aquastar 120 A speedy

[properchopper]

My Jersey Skiff has a rather long run between the speedy and the batteries now that I found the correct CG by moving the batts to the back. Even with dedicated cooling to the SC it comes in a little too hot for comfort, so to reduce the ripple current* I'm thinking an additional cap will help . ( *Actually I prefer Ripple Strawberry but that's another story )

Stripped the batt wires close to the SC and tinned them

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prepped cap; shrink on cap wires keeps it insulated

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soldered on SC wires

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insulated solder joints with shrink & secured with a larger band of shrink

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Nothing new here, just thought someone might be helped by this.

Tony

[m4a1usr]

It can never hurt to repeat the good stuff Tony. Not sure why but OSE has boat loads of info, yet so few bother to do a search. They just ask the same questions that have been answered a hundred times.

John

[properchopper]

It can never hurt to repeat the good stuff Tony. Not sure why but OSE has boat loads of info, yet so few bother to do a search. They just ask the same questions that have been answered a hundred times.

John

John, Sad but true. I actually thought this would be too redundant to post.

[jimi911]

Just finished doing that on my old C80 Cuda ... part of the reason I still have the old girl :)

I really like the anti spark setups. Saved a lot of equipment watching my caps like a hawk and installing anti-spark on everything

[sanyijr]

Tony,

Would you mind informing all on the benefits of adding capacitors? When needed. Capacitor bank vs single. (I know some info its on the main site, but here would be good as well)
Any words of caution....)

Sean

[properchopper]

Tony,

Would you mind informing all on the benefits of adding capacitors? When needed. Capacitor bank vs single. (I know some info its on the main site, but here would be good as well)
Any words of caution....)

Sean

Sean,

I'm not qualified from the point of electrical theory to go any deeper into the issue than to say that adding capacitors, in the end result, makes the SC run cooler in certain cases. I was just one of the sheep that followed along when the "add capacitor fad" started some time ago. Those better educated in this subject may chime in.

[jimi911]

Helps with heat dissipation (more/larger the caps ... better heat transfer), helps the esc handle spikes, and smooths out the flow of 'juice' through the esc.

Wont give you greater performance past the specs of the esc, but will give you a greater measure of safety.

[properchopper]

Helps with heat dissipation (more/larger the caps ... better heat transfer), helps the esc handle spikes, and smooths out the flow of 'juice' through the esc.

Wont give you greater performance past the specs of the esc, but will give you a greater measure of safety.

Perfectly worded. In the case of my Jersey Skiff, which due to it's design and irregular running attitude vents and unvents the prop to a large degree, the extra cap should smooth out the spikes and ripple current when this occurs, especially with my extended battery-to-SC wires.

[jimi911]

For those with the larger Castle HV escs, there is a cap bay that is pretty handy and easy to install. I just put one on my HV110 for a bit of extra protection. Adds some length to the setup, but its good piece of mind. This unit also has an anti-spark setup I added, which is nice on the HV rigs.

[properchopper]

Some more applications

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[sanyijr]

Tony,

so to followup on my question... Why did you only add 1 capacitor to your Aquastar? Wouldn't 2 be better? Or 4? Is there a general rule of thumb of what size/number capacitor to X cells, or amps anticipated? Or % of ESC power used to esc rating? Does that question make sense?

Sean

[Brushless55]

John, Sad but true. I actually thought this would be too redundant to post.

Not at all Tony..
I thank God for posts like yours and the great info for us to use..

[properchopper]

Tony,

so to followup on my question... Why did you only add 1 capacitor to your Aquastar? Wouldn't 2 be better? Or 4? Is there a general rule of thumb of what size/number capacitor to X cells, or amps anticipated? Or % of ESC power used to esc rating? Does that question make sense?

Sean

Sean, I'm "electronic theory challanged" so here's my "rule of thumb" :


1] : Measure thumb :

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2] : Find capacitor of similar dimensions :

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3] : count thumbs

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4] : Install thusly : # thumbs = # capacitors ( if you're one of those people that are "all thumbs", buy extra capacitors)

Seriously, I hope someone with more grasp of this answers your question. It's been discussed & posted before on OSE.

Enjoy,

Tony

[sanyijr]

Tony,

I appreciate your literal interpretation..... But your math worries me a bit

But I do see you are using 25V caps. Can you (or anyone since Tony will use a differnet rule of thirds or something creative....Not that there is anyting wrong with that) give any advice on the Voltage capacity on the caps? I assume Capacitor voltage should never be less than the total battery voltage.... Is that a safe bet?

[Steven Vaccaro]

It can never hurt to repeat the good stuff Tony. Not sure why but OSE has boat loads of info, yet so few bother to do a search. They just ask the same questions that have been answered a hundred times.

John

I really have to work on going a better job on categorizing helpful tips.