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Old Jul 29, 2014, 04:15 PM
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Bigger prop on a stock tfl smash shark with tfl 120a esc?

Hi.

I run a smash shark with tfl electronics and got some questions about tuning.

The esc is 120a and it comes with 6mm bullet connector, it have a small battery at the top that is connected to the esc battery cable.
This esc comes in hard plastic, anyone that have experience with this esc?
Motor is a stock 2070kv.

When i run this on 4s with stock metal prop that is 38mm the esc and motor keeps cool, the only thing that is hot is this little battery pack on top of esc that is connected to the battery plugs.
Im impressed about this esc after reading a lot negative of the tfl 125a that is in a rubber plasic thing outside.

I have run it about 17 times now and it works great.

Could i run with bigger prop on this esc or is the stock 38mm maximum size?

I could try out 40,42, 44mm and bigger props.
If i go from 38 to a 40 or 42 prop, how mutch faster would it be? Dont want to overprop it

I got another question, if i buy a 180A esc, could i run this motor on 5s?

Thanks for answers!
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Old Jul 29, 2014, 04:22 PM
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Don't think its a battery pack on top of your ESC...Its a capacitor bank.

2070Kv on 5S is do-able, but not recommended as you are approaching 40,000 RPM.

How hot does the cap bank get?
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Old Jul 30, 2014, 01:40 AM
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Could you tell me what it is? Never see one like this before.
Its hot to touch, guess about 45-50celsius but i could take with me a temp gun next time i run it and it shows farenheit and celsius
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Old Jul 30, 2014, 03:28 AM
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Show some pics.

Otherwise it is difficult to discuss.

Roland
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Old Jul 30, 2014, 09:25 AM
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Originally Posted by waterprooof View Post
Could you tell me what it is? Never see one like this before.
Its hot to touch, guess about 45-50celsius but i could take with me a temp gun next time i run it and it shows farenheit and celsius
https://www.google.ca/search?q=tfl+e...banks&tbm=isch
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Old Jul 30, 2014, 02:15 PM
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Here is a pics of the esc.
Could i go from 38mm to 40mm? Would it make difference?
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Old Jul 30, 2014, 02:34 PM
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Double post.
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Old Jul 30, 2014, 02:49 PM
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Dont do 5s - I think you would burn your esc.

Do a 2min full throttle run with stock prop, then get it to shore and measure temp.

Do the same with 40 - if temps are still in the green, try with bigger props till temps go to high.

(Make sure to check temps on esc/motor prior to first run, and then make sure to start run with bigger props at approximately same temp.)
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Old Jul 30, 2014, 02:49 PM
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This is indeed a capacitor bank and no battery.

Never seen the ESC before. May be another expert knows that part. Is there any label on the ESC?

Roland
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Old Jul 30, 2014, 03:08 PM
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Yes i dont want to try 5s, but maby want a bigger prop and i have no idea how mutch faster it would be with a 40 when 38 is stock, it runs cool now so i havnt take any temp of it but thank you for the tip.

No label on it, its made by tfl and its a 120A, thats everything i know.
It have lipo cutoff and count the battery with beeps, works great.
But the battery looking thing on the top get hot to touch when i run it hard over long time.
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Old Jul 30, 2014, 03:45 PM
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If the caps bank are the only capacitors on the ESC (none soldered directly onto the circuitboard) the relative thin wiring may be the cause for the heat.

See if you can shorten them as much as possible, measure if that makes a difference.

Regards, Jan.
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Old Aug 02, 2014, 03:33 PM
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Yes i would try to do that, thanks for the tip..
But what are a cap bank? Other esc dosnt have this outside?
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Old Aug 07, 2014, 05:05 AM
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The cap bank is 58c/136,40f and the esc was about 40c /104f maby littlebit lower.
This was taken after 10 minutes of runtime, and i almost run full trottle the last two minutes.
136f sounds littlebit high, how high could the cap bank be before it blows?
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Old Aug 07, 2014, 07:42 AM
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Normal (good) capacitors work up to a maximum temperature between 80°C and 105 °C.
It always depends on the quality of the cap. But not exceeding 80°C should work for all.
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Old Aug 07, 2014, 07:59 AM
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Originally Posted by rbachmann View Post
Normal (good) capacitors work up to a maximum temperature between 80°C and 105 °C.
It always depends on the quality of the cap. But not exceeding 80°C should work for all.
Thank you for the answer, since 58c is ok then i would try the 40mm prop with two more mm than stock before it draw to mutch amp
Do you have any idea how mutch more speed 2mm bigger prop would give? Or maby i should go for a bigger prop to get more speed? Like a 42 or 44, the stock is 38.
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