So can you go on snow with it easly ?
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No. This is just a picture on the ski slope
I could not cross a distance 10 cm 
Snow was very soft, air temperature was 14 C
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
I bought the FVT 120A 12S on ebay.
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.
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Spare battery pack
The exchange takes about 1-2 minute
After using Cotter Pins the exchange time will be even shorter
The new package is 4x10Ah 4S (20Ah 8s)
Range - 25km (~16 mile)
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@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!
@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
-
Acceleration - “Sleep Lion 120A 12S” https://youtu.be/adR-AoVFE0I
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Acceleration - “FVT 120A 12S for plane, Firmware ported from the car version” https://youtu.be/d2ww5g_CDyk
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Start - “Sleep Lion 120A 12S” - Low torque https://youtu.be/om4OSAx_sWo
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Start - “FVT 120A 12S for plane, Firmware ported from the car version” - Good torque https://youtu.be/yE_1viOjnY8
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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.
Did you try adjusting the “Initial acceleration” and the “Start Power” settings in the ESC config utility? See this post.
Yes, it does not give much. “Initial acceleration” was at its maximum, The increase of values " start Power” causes the jerks of the motors
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.
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Hey @Idea how are the brakes working now? Ive heard a few times they are not always super good on some firmwares…
Also - is it possible to revert back to original firmware afer installing this one, or not?
And lastly - do you also got sensored version or not? IF yes, and if you do run it, does it also work okay?
@Okami I have not tested the brakes, the other Esc is still in repair, I’m waiting for his return from the china.
Yes, you can go back to the previous version
This is a firmware for ESC with sensor support, but my motors have no sensors so I will not guarantee, you have to check yourself at your own risk.
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Quick question: This is for the sleeping lions right?
Awesome! I was getting scared for a moment…
Can you please DM the FVT engineer’s Skype contact or email? I have been trying to get in touch with them about the sudden acceleration bug when releasing the brakes but haven’t received any response. Maytech has confirmed the issue:
The engineer is rarely active on skype, try to contact the seller, he has a room next to the engineer
Skype contact: jennyxcy2008
Some pretty exciting developments here - nice work @Idea!
Hey, is this the same ‘Sleeping Lion’ you have: