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Showing most liked content since 09/23/2021 in all areas

  1. There is quite a lot of buzz surronding the 126V battery pack on the S20, but I haven't been able to find much in the way of dissenting voices of whether this ambitious specification is necessary, desired & what trade-offs would be the consequence of this 30s4p pack configuration. We all know that the current generation of these motors have KV values can easily achieve the limited 70KPH max speed (KS are not likely going to increase this) well within the 84V-100V operating envelope, with margin to spare. While there might be a slight improvement in acceleration, this will come
    25 likes
  2. I wanted to inform everyone that I have official left my position at King Song as of end of September. I do not represent KS anymore. It's been a wild journey full of ups and downs, and I've learned a load in the past year or so that I've been here. I'll still be in this community just not as a KS rep, if you have any questions or concerns please feel free to message through the official channels such as email and FB.
    24 likes
  3. Just received these photos of the Wheel in the flesh, it does not disappoint from the renders. Great video with the interview segments with Sen Zhang, Carey, & Leo Lu, it shows how far this Company has evolved from the first days of making the 14B in the 'back of a garage' type operation.
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  4. I can confirm this, it was a HS/C30 type. Begode just received his machine back for evaluation, of course there was the immediate deflection response of 'it's just this one machine, here's a video showing 68MPH under no-load'... We told our shipping agent to hold sending 2x HSs out until BG have a satisfactory explanation. Marty has received a HT/C38, with caution about the earlier cut-out event on the HS.
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  5. I finally got this video made. I hope that the crucially important information spreads better this way.
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  6. If the motor has more windings (lower kv) so it runs at 126V with the same speed as another with 100V (84V), it uses at the same speed and torque less current compared to such an 100V (84V) motor. All with the factor 126/100 (84) (and reverse). As disspated power is I * I * R the lower current will "outperform" the higher internal resistance of the pack - Just did the math Power delivery, acceleration, limits, etc should all be the same for a design with 30s4p, 24s5p or 20s6p. The lowered current and the increased internal resistance keep the dissipated power P=I*I*R exactly the
    16 likes
  7. It's a good video, but the explanation of the causes of cell/pack failure is to simplisitc & far from complete. Over the past 5 years, we've sold many thousands of Wheels, of the couple hundreds of pack failures that we have dealt with, >90% had been using the stock charger & following the standard manufacturing practice of charging to 100%. The strongest correlation evidence of premature pack failure is the cell-brand, followed by BMS fault & then shock/trama events—where single cells break from the nickel strips in the series. Another consideration, that is somewhat
    16 likes
  8. Actually, I just made a quick query to EUC World database and here are the current results: average distance of single tour is 10.3 km / 6.4 mi average riding speed is 15.9 km/h / 10 mph average tour duration is 1 h 4 min As EUC World database has grown over last year (over 4 000 000 km / 2 500 000 mi, over 400 000 of tours), I think it's a good idea to create updated and more detailed, statistical report from EUC World that could put some light on our community's riding habits.
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  9. I bought a begode ex.n as my first euc. probably not the best idea, but whatever. got out on it for the first real time tonight in a tennis court. the area had 5 courts surrounded with a tall fence. I struggled around the fence 2-3 times slowly, always depending on the fence. after that I just leaned forward and gained some speed and let loose of the fence. at the end I was able to circle 4 of the courts several times without dropping the euc to the ground. I went both directions. now I have a taste of riding an euc. I was able to accelerate and decelerate, make the big circle,
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  10. Great presentation @Jack King Song, it was nice to see the the engineers and designers speak about that they created, with execs backing them up. It's fantastic to see an increased focus on safety with an innovative sensorless controller mode taking over in case the hall sensor fails. I have two requests on safety which will help to reach another level. Context: some of the most harmful crashes are due to the inability to hear beeps. 1/ High frequency "safety margin" data over Bluetooth Low Energy On current wheels, the frequency of wheel data sampled and sent over blueto
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  11. All you need to know about 80% charging:
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  12. I just started using an Electric unicycle and I love it, I was going to buy a E-skateboard but stumble upon this brand new world and I can't seem to get enough of it. And I'm sure a lot of people feel the same way but here's the problem. Speaking for the U.S. here, These machines started as a form of relaxation, where you could use it to walk your dog, or ride it around in the park or purchase it as a gift for your kids but slowly the market shifted to accommodate consumers needs and request. Where now we have wheels that can travel 70 miles on one charge and travel 50 +MPH. And ma
    11 likes
  13. Let's be real, KS is marketing this wheel to the masses with the typical rider cruising around on the streets, not blasting through gnarly bike trails as fast as possible needing every bit of suspension performance they can get to stay on the wheel. The typical rider will probably not know much about suspension and just ride it till something breaks (like most cyclists). In that usage case, you need to consider KS' perspective of long term reliability. As a coil shock wears, the compression and rebound gets weaker and you'll find yourself adjusting the dials until enough oil starts leaking and
    10 likes
  14. Just a few more of the photos of the "Modular" construction posted by Bradley Michael Spence of eevee's on Facebook (for those that don't do Facebook): EDIT: Abrams side pads photo below courtesy of Negreanu George Ovidiu via Facebook:
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  15. I have not the slightest doubt that it's a required move for one main reason: it is a necessary step to improve safety and durability. Full size electric motorcycles or electric cars have higher voltage packs (up to 800V) This is what allows them to get to the speeds expected from them, with the torque required to accelerate their hefty mass quickly. Increasing voltage is the key element that will allow to provide higher amounts of torque through the whole speed range, using in a better way the finite amount of power a battery pack of 120 cells can provide, to satisfy the self-bala
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  16. Funny thing about colors and injection molding. Color basically cannot be "spec'd". You specify Pantone xyz so it matches the marketing assets (brand police are everywhere don't'cha'no) and you get back something sort of close so you spec a slightly different shade, lather, rinse and repeat. Victory! Then the mold is textured and the color isn't even close (light reflects differently off the 'new' surfaces) so you tweak and tweak and tweak. Different formulation of the plastic in the same mold is a different color. Parts from a steel tool are different than the ones from the aluminum tool. How
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  17. Jack posted a new video.
    10 likes
  18. I like the word balance. Design is really a game process. Like you said, cost and quality, performance and safety, strength and light weight. Keeping the old design is definitely the safest, lowest cost, and most mature, but now all start to choose hollows. The motor proves that the old design has reached its limit, and it is necessary to find a new breakthrough design. Risks will follow, heavier, less reliable and more expensive. Everyone wants millions of ranges, millions of power, and baby's weight. All improvements must be matched with corresponding designs. Then balance is very important.
    10 likes
  19. Once the Vessel assignment has been made, we normally send out another update with this vessel tracking, this should be about a week from today. Sailing times are constant, once the boat starts moving @ 2 weeks to LA. The LA port has been a bad bottleneck recently, with 3 weeks for the last container to assign a bearthing space, there's hope that this backlog will ease up a bit, now that the port has [finally!] started 24hr operations. Our Fulfillment guys ought to be able to turnaround the container same day, adding the wristguards to boxes, doing a sanity completeness check & slappi
    10 likes
  20. Small off-road clip of the S20 in Jacks review of the commander here (linked to 3:14):
    9 likes
  21. I’ve passed 1000km on my v12. Didn’t take long. I’ve driven in rain, rode hard trails, cruised around touring vineyards, and gone grocery shopping. - range test wise, coming from a 16x, it’s very similar range. The only difference is that I’m cruising 10km/hr faster on average during my ride. - handle is ok. I prefer the 16x handle, but not much to complain about here. - touch screen is great. Seeing my speed, battery, time without pulling my phone out is fantastic. - split mode is great, but I enjoyed the ride on all the different modes. - I never messed with the pe
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  22. The headlight is a bit better with the black frame (the shape is less marked than in chrome). Nice to see some details.
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  23. In reading this thread, I think the one thing that stands out for me is that we are a pretty diverse group of individuals, each with his/her own desires, skills, and definitions of what an EUC is and should be. Some of us like to ride technical trails, which probably often equates to shorter rides (distance-wise) and lower average speeds. Others like to go on long rides in the country, and some are just speed demons with no desire for anything but flat-out speed. Many of us probably want to do a bit of all of that, which often makes some of the stats (average speed, for example) pretty much ir
    9 likes
  24. I'm afraid your hunch flat-out contradicts the available data. The author of EUC World, the biggest third-party EUC ride-tracking app, has revealed rider speed statistics: And that's just the users of EUC World, which would be heavily skewed *toward* enthusiast riders (not including all the casuals who only use the stock app or no app at all, and who would just bring all those numbers down even further). There's really little room for debate when we have such a massive data set. On one hand you have the skewed anecdotes of enthusiasts in their bubble ("well people on the niche enthusia
    9 likes
  25. Abrams battery packs are sealed in individual housings and incorporated into the side panels. Photo courtesy of Afeez of e-Rides via Facebook: Very nicely done!
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  26. I too can't understand no one reacting to the much improved build quality Veteran have made with the Abrams, especially in this area of cooling! King Song's S18 used this method of control board housing without the need for fans for cooling and is one of the coolest running wheels currently available, so this move bodes well for the Abrams. Photos courtesy of Bradley Michael Spence of eevee's via Facebook: This is definitely a huge step in the right direction and also an initial insight into what Veteran are describing as "Modular" construction fo
    8 likes
  27. Numbers I posted are just averages. While it may represent some kind of "undefined majority", I would refrain from pulling anything from these values for now. I plan to create detailed statistical analysis that will be much more helpful in determining our habits, preferences, riding style etc. So please guys, calm down and wait patiently
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  28. Cells are a chemical sandwich that cannot be manufactured in an identical matter. The same way that ice cream sandwiches cannot be manufactured with identical bubbles and overflow Variation in capacity and resistance are normal, and our designs must tolerate it. -- There are always (slightly) weak cells -- Not really. As an example: Assume one 'weak' cell in a series has 10% less stored energy than the rest. Assume we begin with all cells 'balanced': every cell starts from 4.20 V. During discharge, the EUC will bring the healthy cells down to 3.15V. The 'weak' cell
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  29. I am old school knowledge on batteries, yet I don’t see why this would not apply here. When you run batteries in series they are only as strong as the weakest cell. From day one, one of the cells is the weakest link. That cell is then damaged by the good health of the other batteries. The weak cell is over drained and charged every cycle. The BMS does what it can to minimize the damage. The point is that any abuse will be directed to the weakest cell. The damage is compounded. This also backs up Jason’s statement on poor quality batteries as being a major factor in failure.
    8 likes
  30. It uses Hall to establish the initial movement from rest, then switches over to reading the back emf from the motor to establish rotor position once underway. So any hall sensor/wiring failure when riding is is a non issue, its only when you come to a total stop the wheel would lose balance and presumably an audible warning/alert to the rider. Its a step in the right direction, but I am not aware of any great numbers of hall sensor failures. That said, if the new system saves just one crash, its a bonus.
    8 likes
  31. Hello everybody, I'm new to the forum and just want to introduce myself. My name's Jacob Ferguson and I'm in Washington, D.C. I've had an EUC for about two years now? Kingsong 14D. I use it more than my car :) Definitely best toy I own, I'm not even sure what I'd do without it. I use it so much I've even apocalypse-proofed it (bought and stored up parts ahead of time - tires, tube, extended battery, pads) in case supply chains or something ever take a hit again. If they do I'll still be the guy zippin around on his wheel :D Thanks to who ever created and/or runs the forum. I'll be bac
    8 likes
  32. The reason for taking all the body panels off of the s18 is to get access to one of the 6 screws that hold the cover over the battery connector. By letting all the air out of the shock you can collapse the wheel and get access to 5 of the 6 screws. To get to the 6th screw move the pad to the side a bit and drill a small hole above the screw so that you now have access to the 6th screw. By doing this you can now remove the small access piece covering the battery connector. Once that’s unplugged you take off the pedals and unscrew the axle bolts, 4 per side, deflate the tire and slide it out.
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  33. I don’t know about other dealers. They might be good. eWheels has always been there for me. Quick fair and generous. I feel secure with eWheels.
    8 likes
  34. This 1000%. As a dance professional with some knowledge about knees/ankles/feet and the consequences of various stances, the extreme pedal angles are absolutely terrible for everyone. Even for those that say it's not a problem for them or that they like a more extreme pedal angle, there's still a likelihood of longer term consequences as a result of the types of stresses produced by such a stance. I understand the benefit of some pedal angle but the Begode wheels take it too far, whereas both the King Song and InMotion wheels have a far more reasonable amount and are therefore likely
    7 likes
  35. The reduction in battery capacity seems pretty significant if you're comparing 3200 Wh (Sherman) with 2700 Wh (Abrams, EX.N) The thing tho... Sherman has 240 cells, each with 12.42 Wh capacity. Total: 2976 Wh. That's not 3200 or 3100 as advertised. (I wonder how they were not fact checked and corrected for false advertising) But at least, it's not that different from 2700 Wh. In practice, 2700 Wh wheels get a range pretty close to a Sherman when riding together, including on long rides. Sometimes a 2664 Wh Nikola+ or EX.N would show a higher voltage, sometimes lower. It's hard t
    7 likes
  36. This might be the point of higher voltage. The current standard is 100.8V & 70kph max speed (free spin 105 kph), a configuration which puts a lot of stress on the controllers for low speed accelerations and climbing scenarios. It's nowhere near as bad on a Nikola+ which has a free-spin of "only" 77 kph, giving it an easier time producing low speed torque. It climbs well and without fuss. Instead, 126V (or more later) might be the main way to make 70kph+ wheel work reliably - at all speeds. I don't want to hear "this is a high speed wheel, of course it'll burn if you try to cli
    7 likes
  37. The options available to the system designer are large partly because there are so many variables at play. The motor itself, the wiring, the MOSFETs, the physical envelope for the batteries, the cooling, and so on. It is a fact that lowering the current required to deliver a specified amount of power to the load is in general a good thing—mostly because you reduce how much of your power is lost in heat (square of the current) and equally importantly you reduce the stuff you have to add to get rid of that heat. But an additional wrinkle is that at 70A current levels you should begin to con
    7 likes
  38. The LiTech packs appear clearly superior to what Begode/Gotway have been using. (See the details including pictures in my recent news roundup: https://forum.electricunicycle.org/topic/17309-up-to-date-euc-comparison-table/?do=findComment&comment=389532 ) And more importantly, it appears they're being manufactured entirely by LiTech and shipped directly to Begode for installation into the wheels at the time of manufacture, so eWheels is not doing any manufacturing or modifications to anything themselves. Essentially eWheels just helped Begode get a new/different supplier of superior packs f
    7 likes
  39. September/October Update Another huge update to rival the last one as the past 6-8 weeks have seen a flurry of activity. eWheels has officially launched its unique line of Begode wheels featuring eWheels-sourced battery packs, starting with the T3/Tesla V3, EX.N (HS & HT), Hero, and Commander (HS & HT). This marks the first new Begode wheels added by eWheels in a year(!) (since the RS in Oct of 2020). The eWheels-sourced packs are assembled by LiTech Power and feature the following improvements/capabilities: Imported Korean Samsung 50E cells (Versus the Begode packs w
    7 likes
  40. Näitä jonkun aikaa katselleena päätin vihdoin tehdä muuvsseja, ja laitoin Inmotion V10f tilaukseen. Tasapainovehkeitä (skeitti, laskettelu yms) viimeksi 15+ vuotta sitten harrastaneena mielenkiinnolla odotan mitä tuo harjoittelu tulee olemaan. Sää ja syksyn lehdet varmaan tuovat lisämausteensa hommaan Haussa oli kompakti sähkökulkupeli kaupunkiympäristöön, ja EUC täytti tuon kriteerin parhaiten. Turvallisuusaspekti mietitytti, mutta videoiden katselun jälkeen vaikutti siltä, että alkukankeuden jälkeen pitäisi olla turvallisemmasta päästä näistä härveleistä, suojaimet toki päällä. Polii
    7 likes
  41. I received my monster pro on the 6th. Begode is improving their build quality. They still have a ways to go. On mine they sealed the led fixtures on the wheel well side but left the outside of each fixture bare. Their glue job has improved over the RS I got last year. I still need to remove the motor and check the grease in the bearings. Begode seems to source bearings that are packed with petroleum jelly. Those bearings are for food processing equipment, not outside in the elements.
    7 likes
  42. I would strongly suggest taking apart the motor and letting the internals dry. I would not be surprised if you found residual water inside of the motor, and that water will linger there for an eternity if you don't let it drain or dry out somehow. There's a local rider around where I live that had a submerged tesla V2 that worked perfectly fine after its submarine trip in a lake, but it developed all sorts of gremlins after a few months. When the motor was disassembled 3 months later, there was water still inside it and the internals of the motor were pretty badly corroded. Take the "better sa
    7 likes
  43. I am a 0.000000000001 percenter !! I think at least 10% of us are.
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  44. Thank you so much for paying attention to these details and telling you a good news. Everything in the rendering will become reality.
    7 likes
  45. I had the same problem twice with a wheel I bought from them, all manufacture's issues. Both times involved shipping heavy boxes back and forth across the country, each time was fast and efficient and at no cost to me. I imagine they have a set up with the manufacturer that covers them for these kinds of things, but I don't know for sure. What I can say is I don't have to deal with it, they take care of it on their end. When I upgrade (I think everyone this crazy sport clicks with will upgrade at some point), I'll chose eWheels over brand or model available, since it seems the safest way to b
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  46. I think we need to give Jack some space. S20 is a very ambitious project and many things need to be adjusted and tuned before becomes as amazing as we all have imagined it. I would rather wait for something amazing for a couple of more months than getting early disappointment. ;-)
    7 likes
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