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    Dual Drive single motor MTB

    Nice drawings and design! Leaving aside the power issues (or rather a lack of power), I also notice there doesn't appear to be any differential. So both wheels are forced to turn at the same speed which may only work well in low traction environments where one or both wheels can slip a bit...
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    Loaded Vanguard Carbon Cast Ronin Single VESC 10S4P

    I went and looked at your older builds, but didn't find the one with that gold aluminum. The closest thing I found is the Topspeed case made from carbon plate, aluminum L, and rubber tubes of some sort the allow for stretch or compression in the right places... Should work well for me, and may...
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    Loaded Vanguard Carbon Cast Ronin Single VESC 10S4P

    Er, yeah, 3 kids here... One of them 5 mo old. So yeah, no time is an understatement. It's taken me many months, and I still don't have a completely functioning board due to lack of good enclosure. I have a 12s4p in 2 6s sticks, so I can't tolerate flex and am still trying to figure out a...
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    Loaded Vanguard Carbon Cast Ronin Single VESC 10S4P

    I'm jealous... Jealous I don't have your fabrication skills... and jealous that I'm not independently wealthy which apparently you are since you have nothing but time and money to put into board after board after board! :) I like this build SO much, that I want one exactly like it for myself...
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    Polyethylene battery gaskets

    Thought I'd share an idea I went with for 18650 battery gaskets. Instead of paper gaskets I fabricated my own gaskets out of UHMW polyethylene sheet, 10mils (e.g. http://amzn.to/1Patsuo). The adhesive of the stuff I linked to is supposed to be good to 200F which is a decent amount of headroom...
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    Lowest and highest kv

    Assuming the motors are identical (except for how they are wound), and looking only at copper loss, yes. The 1000kv motor will have 1/10th as many winds of wire that is 10x thicker. So, resistance of the coils in that motor will be 1/100th that of the 100kv motor. So, let's put some phony...
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    Loaded Tesseract Carbon Single VESC 6355 10S4P

    Sorry, wrong link... Here is a review of the HG2 where they make some comparisons between it and the HE2/HE4 (there is apparently little difference between the HE2 and HE4): https://batterybro.com/blogs/18650-wholesale-battery-reviews/57179459-lg-hg2-review-20a-3000mah Sorry, but not...
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    Loaded Tesseract Carbon Single VESC 6355 10S4P

    First, here is a really good comparison between HG2 and HE2... https://batterybro.com/blogs/18650-wholesale-battery-reviews/19198431-what-is-the-difference-between-the-lg-he2-and-lg-he4-which-is-newer-better Second, I got 100 HG2s for $4.50 each through Lunacycle in February (with min. 50...
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    Loaded Tesseract Carbon Single VESC 6355 10S4P

    Well reasoned... makes sense. But, a nunchuck would let you eliminate the receiver altogether. But I think I saw somewhere (maybe vedders forum?) that you used to use a nunchuck. Why'd you move away from that? EDIT: Nevermind, I see in another post that your faraday ca.... er, I mean...
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    Loaded Tesseract Carbon Single VESC 6355 10S4P

    Nice stuff Whitepony.... as usual. Your build threads are very useful and informative... All the pictures are really great too. Wish I had as much time and money as you appear to have!! Still wouldn't do as nice a job, I'm sure.... Anyhow, I know an anti-spark switch costs a lot (though...
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    Trampa EMTB EToxx Dual VESC SK3 6374 10S6P DIY Battery

    I was just about to start using one of these loop keys in a project I'm working on, so my curiosity is piqued here... Why do you think it was the parasitic inductance that did this? The whole scenario seems more consistent with simply a bad solder joint in the loop key... If the connection...
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    Reducing Welding electrode sticking?

    Good point re: the electrodes and cables. The electrodes get uncomfortably warm after welding maybe 30 or so welds (into .3mm at full power/pulse width) in fairly quick succession... So yeah, the resistance has got to be fairly significant. I'm just about done with this pack (12s4p), But may...
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    Reducing Welding electrode sticking?

    How do you know how many amps you are running? What battery setup are you using? I can only weld (with a JP Welder) .3 with cut or slotted material and would really rather not have the extra step. Thx
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    JP spot-welder, FET-switched, timed adj. pulse

    I went ahead and tried a dremel first. 5 out of 6 welds were good and the bad one I credit to the inconsistent surface (I have been re-using this AA battery, just filing it as smooth as I can between tests). Pics.... First shows 6 welds onto a AA battery with a single piece of slotted 8mm...
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    JP spot-welder, FET-switched, timed adj. pulse

    I was fortunate to receive one of the last welders before riba went on hiatus. And it seems that perhaps folks are having varying degrees of success with .3mm nickel, so thought I'd report my results as well. I have an 80 amp-hour group 24M deep cycle battery. Because I knew I wanted to go...
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    Loaded Tesseract Carbon Single VESC 6355 10S4P

    FWIW, Roarockit folks recommend Owens Corning Foamular C300. I have no idea if you can get that in Germany or if it is more dense that what you are already using. That may not help though since the bag is really going to try very hard to squash that corner right off. I'd probably fashion the...
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    inductance problems w long wires? Make them parallel connect

    Yeah, of course that's right now that I think about it more... So, yes, inductors in parallel will have lower series inductance overall, that is only true if those inductors are independent! That is, they each are not coupling into one or more of the others. However, when you run two wires...
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    inductance problems w long wires? Make them parallel connect

    Yeah, that certainly will work. Taken to an extreme, you could run something like a dozen small wires. You've just (re)invented a litz cable! A litz cable is a cable with a number of small gauge solid conductors, each individually insulated and all of them put in an outer sheath. Solid...
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    PSA: do not get ripped off by Enertion

    I'm not the OP. Agreed, if he lies to the CCC and tells them he never got it, that would be a problem. There is no indication whatsoever that is what he did or intended to do. Don't shoot the messenger.
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    PSA: do not get ripped off by Enertion

    No way it would be fraudulent whether in the US or Australia.
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    Battery Building Question(s)

    I'm not 100% sure I follow what your concern might be. However, even with no load, it would be important to make sure the batteries you wish to connect together are all pretty close to the same voltage. Worst case would be the already parallel connected cells are fully charged, and you connect...
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    Looking for a power supply

    Hey @michaelkramer11, did you ever figure out whether the r33 mod applies to the SE-350s as well?
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    VESC cooling on longboard

    The oil filled box won't help much because the heat still needs somewhere to go. The oil has a higher specific heat capacity than air, but only by maybe a factor of 1.5-2. So, it could maybe absorb twice as much heat as the air, but that doesn't buy you all that much in an enclosed space...
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    I have had a bad experience with OllinBoard

    A person also doesn't have freedom to create and post from multiple accounts. "DON'T create more than one account for any reason. If you have multiple accounts it may lead to deletion of ALL your accounts". https://endless-sphere.com/forums/viewtopic.php?f=13&t=152
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    I have had a bad experience with OllinBoard

    Wow, more dishonesty... You can't possibly *not* know who this is purely from context. Yet you choose instead to disparage others in the business. Look, this is easy to prove if you will consent to my releasing our email correspondence. You refunded my credit card Thursday, I'm in Southern...
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