EFX3 - Trampa holypro 35 | ESC FVT 120A | Tunigy SK3 6374 149kV | LiPo 16Ah 8S

ESK8 Builds
41

From tomorrow I will sell kits

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42

I do not have video, I did a quick test, In Poland, the temperature is below zero.

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how much is the kit? I was really hoping to print it being on a budget and all

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44

@LoneWolf607 Prices of individual elements in this topic

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How did you reach 16A - 8S with the Zippy Flighmax? 4 x 8000mAh-4S 30C?

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If you want to 8S 16Ah, use 4 pcs 8Ah 4S. What is your ESC?

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I am waiting for a VESC, probably 10S. So you have two in series and two in parallel?

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Yes. I use 8S because I have a charger SkyRC Ultimate Duo 1400W, which charges the batteries LiPo 2x8S

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50

So can you go on snow with it easly ?

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51

No. This is just a picture on the ski slope I could not cross a distance 10 cm :slight_smile: Snow was very soft, air temperature was 14 C

52

Hi Tom, where did you buy the ESC? Are you happy with them? Did you make the metallic enclosures or were they supplied by the vendor?

I did not remember the speed and range you gave at the beginning of the thread. That is very impressive with 8S. That could make me reconsider my build, where I intended to go with 10S. But if you buy Lipos you do not find many 5S to put in series, it’s very often 4 or 6S. Do you confirm the speed and range you gave earlier (by experience)? Thanks

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I bought the FVT 120A 12S on ebay.

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I do not have aluminum casing. The firmware for skateboard is flashing me manufacturer, I sent esc to China.

Later I bought ESC FVT 120A 12S “Sleep Lion” in aluminum housing. Unfortunately, the new ESC is bad for mountainboard,

I made a movies comparing the older ESC type (which one I use) and the new ESC FVT Sleep Lion.

I reported the problem to the producer but this time he ignored me, so in a few days I will post on the forum videos showing the problem.

1 Like
54

Spare battery pack

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The exchange takes about 1-2 minute After using Cotter Pins the exchange time will be even shorter :slight_smile: The new package is 4x10Ah 4S (20Ah 8s)

Range - 25km (~16 mile)

6 Likes
55

@Idea Do you have any news on the “Sleeping Lion” ESC? I was about to buy some when I saw your post.

What was the problem and were you able to solve it?

Thanks!

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@Onester “Sleep Lion” has a delay, so it is not suitable for Mountainboard. Mountainboard needs full power without delay, especially in difficult terrain. The problem is also “take off”, “Sleep Lion” has a small torque at startup.

I posted 4 videos showing the problem

  1. Acceleration - “Sleep Lion 120A 12S” https://youtu.be/adR-AoVFE0I

  2. Acceleration - “FVT 120A 12S for plane, Firmware ported from the car version” https://youtu.be/d2ww5g_CDyk

  3. Start - “Sleep Lion 120A 12S” - Low torque https://youtu.be/om4OSAx_sWo

  4. Start - “FVT 120A 12S for plane, Firmware ported from the car version” - Good torque https://youtu.be/yE_1viOjnY8

5 Likes
57

Wow yeah that definitely is a huge difference.

I really wanted to try 12S for my first build, but probably now will go with Hobbywing Max6 in 8S just to certain I get something that I know will work.

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Did you try adjusting the “Initial acceleration” and the “Start Power” settings in the ESC config utility? See this post.

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Yes, it does not give much. “Initial acceleration” was at its maximum, The increase of values " start Power” causes the jerks of the motors

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After an hour of conversation on skype I persuaded the engineer at FVT to modify the firmware.

Now ESC has a “kick” Acceleration is no longer delayed. I am sharing the new firmware.

I will not respond for damage. Upgrade firmware to your own risk.

7 Likes