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Showing most liked content on 05/05/2016 in all areas

  1. Another video of Damien Gaumet with his drone :
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  2. Here is another one: Battery level at the beginning of the ride: 93%Km range: 52 kmAverage speed: 22,3 Km/hSteepest incline: 17%Altitude difference: 316 meterRiders weight: 73 KgBattery level at the end of the ride: 30% I think this is impressive. And I don't have ambitions for longer rides - so the 680Wh version is the correct one ... FOR ME.
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  3. It is dangerous to wear hard objects on your finger when faceplanting. I propose to use a soft thing such as a small rubber duck for babies, glued to the under side of your glove. Press it to make quack sound. It also protects your hands when falling.
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  4. Since EUCs and airplanes don't mix anymore, addicted Wheelies have a vacation problem. Here is one suggestion for fighting the withdrawal symptoms: Sorry for the plain uncut/no music delivery ... while still on tour, I have no tools at hand to do better.
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  5. @Addwyn: T h a n k y o u Excellent description - I hope your wheel is functioning again with the new fuse... I needed an hour for both sides - because I thoroughly cleaned up the KS16 while doing so. I detached both loudspeakers and rode 48 Km today. @All: The news are: The KS16 still emits the beeping sounds! So there must be some kind of beeper directly on the control-board. This also explains why the KS16 beeps when deactivating the loudspeaker with the app. Also it always puzzled me why the horn sounds different when the loudspeakers are activated / deactivated. I
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  6. I ordered a bunch of inexpensive (less than USD $2 each!) signal bells and did a little video testing them out. My favorite was the cheapest one, 50 cents each!
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  7. Hello everyone. After MCM4 I bought a Kingsong KS 18 with 1360wh battery. I am very disappointed. When I tried to charge it for the first time, it burns in flames. I have a video to explain: I wrote to the supplier and I wait for his answer. Did anyone experienced anything like this? What can I do? Thank you very much.
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  8. 1. Start up beep or greeting: "Hello Dave, ready for your face plant today?" 2. First speed warning: "chicken, chicken, chicken" 3. Second speed warning. "Hot, hot, hot" 4. Danger imminent faceplant warning. "Banzai !!! 5. Low battery warning: "I cant help it Dave, just the idea of loosing you depresses me quite badly"
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  9. I got tired of yelling (from inside the helmet ), so I got a bell last summer too. Just a basic bicycle-bell, pretty much similar as dmethvin's favorite. Never thought it could fracture my finger in a crash though, but that's not going to stop me from keep on using it.
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  10. That looks like a similar model but smaller case. If you search you can find 4A models as well as the 5A. The 5A is 180x90x63mm, that 3A is 170x90x50mm.
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  11. No but there have been software bugs in the past where it did but they have been fixed as soon as it was discovered due to how dangerous that would be.
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  12. Upon further reading of the thread history I think I understand what you are saying. You think that the "tilt-forward" was actually the "tilt-back" protection mechanism but due to riding in the "wrong direction". Any properly designed euc tilt-back function will tilt backwards properly (never tilt-forward unless a bug) regardless of which direction you are traveling (ie. negative speed on the app). I think what you experienced is that simply that the wheel could no longer accelerate when you lean forward. That is why you experienced "tilt-forward". You are very lucky the motor didn't cut
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  13. I ride with my wife and kids, Money well spent.
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  14. @Paddylaz Under high load (speed, weight, fast manoeuvering) a tire needs a higher resistance to compression = stiffer side walls and/or higher pressure. Higher tire pressures also boost the range and will make the wheel more reactive (less friction) and improves control (less flex). The lower the side walls of a tire is, the stiffer it has to be and/or the higher pressure you have to put in it (or both) to get the same resistance to compression. This reduces the impact absorption and as such making them less comfortable to drive (same with bike or car tires). IPS po
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  15. Oh-oh @esaj , now you are playing with fire. Lol . You are waking up the pedantic side of my personality. Hate that about myself but cant help it! So here it goes: While the use of the word " amateur" wasnt technically incorrect, the word has several different connotations and the context you used it in implied a particular meaning - "amateur " as in "not knoweleable enough", or " prone to making mistakes" . However, the definition you listed is not restrictive to the word "amateur" and my point was that what you are can be better described by a different word. "EXPERT" , for instance,
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  16. Another little meetup in Seattle. It's hosted by the Solowheel dealer so lots of them and an mcm4, hehe. I'm filming most of the time but you see me in the lighter blue shirt a few times.
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  17. Hi all , I needed to increase the really poor range of my generic chinese EUC so I decided for the cheapest way that was adding one more battery to it . It's a 350W motor and originally mounted a 132 w/h and I bought on Aliexpress an equal one -obviously with its BMS- , so now I'm having 264 w/h , still not too mutch but for my entry level EUC will be good. This is my first EUC so next will be a more powerfull one ! I wanted to share with you my mod , which consisted mainly in finding suitable space for the new battery . Firstly I was convinced I would have found place just ove
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  18. Yes "Play"-mode is the right mode to choose. I just came back from a 44 Km ride: Battery level at the beginning of the ride: 100% Km range: 44,2 km Average speed: 22,3 Km/h Steepest incline: Altitude difference: 213 meter Riders weight: 73 Kg Battery level at the end of the ride: 37% T h i s i s s o m u c h f u n I really love the KS16 now (this was a ride with a very long forest section where the noise wasn't too painstaking). On the 1st of May traditional Germans waver and todder through the forest because they pull a wagon with beer through the forest whic
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  19. Probably should add that EUCs "lured" me into learning electronics, that's another grand or so there with all the components & tools I've gotten. I don't even want to count how much all those "small" Aliexpress orders add up to, 10€ here, 20€ there, 30€ to something... 400€ for oscilloscope. I'm scared to just look at the number of orders anymore All orders: 310 Total reward points: 1382 A3 level member Your level is higher than 98% of other users. 310 orders? How the **** did that happen?
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  20. I've been trying to get my head around how the motor control in EUCs (or in general with 3-phase brushless direct current motors, BLDC's) works, and been meaning to write this post for a good while (a "raw" -version of this has actually sat on my hard drive for months). @Henrik Olsen's question about the mosfets sparked me to finally get around to quickly read this through, make a few small additions and corrections and finally "publish" it here in the forums... So here goes, hopefully I corrected most of the typos etc, and it reads fairly easily, it's been written in parts every now and then,
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  21. Hy Guys, perhaps some of You Know The Facebook Group "KingSong Thailand".... take a Look at their Page....there Are also some Videos of me joining The Group! Nice Guys ...i felt warmly welcome :-) example(me the fat One ;-)) First Impression of KS16: stable As hell....MUCH stiffer than KS 14....needed about 30 minutes to feel real comftable, but After that it's a winner in all terms!!!! And to get used to was because of generell 14 to 16 difference, nothing Special KS thing....What i want to Point out Is that in 35 degrees Celsius and hard pushing i Never got a
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  22. Odin broen i Odense på Fyn er et godt sted at unicykle..... Iøvrigt mangler din poll navne liste Firewheel 260 og XIma, disse 2 er på Fyn.. Jean
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  23. I have made a real wide tire EUC. The tire is 110 mm wide It seemed very stable but had no reference to compare it to. A few weeks ago I saw for the first time another person riding 14" generic EUC on the sidewalk . I immediately jumped on the rider asking for a short ride . It felt to me extremely unstable but I only had less then 1 minute to ride it though That is what I can say about the issue
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  24. Ok, I got the motor and hooked it up into the oscilloscope (probe on one phase, ground on another): Nevermind all the mess on the table. A couple of spins and screenshots later: So, the signal certainly looks sinusoidal. But, does this actually prove that it is (or isn't) a PMSM-motor? I'd expect the signal to be sinusoidal, as the coils move across the magnets (getting closer and then further away) either way...
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  25. This was already mentioned in my question. There is often stated that the motor types differ in their BEMF. True or not? Are our motors of the sinusoidal type? Again, my point is that the battery brakes the motor via the freewheeling diodes. Has anyone ever seen something else?
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  26. Just to add one more thought to my previous post: Detaching the loudspeaker cable has also shown that neither the clicking sounds when switching on the KS16 nor the high pitching sounds when driving around is getting amplified by the loudspeakers (at least telling from personal perception). The noise level did not decrease! This would have been too easy...
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  27. A common ground for isolated supplies is no problem - by the insulation there is no electric connection between the input and the output. So you are free to to put all the output grounds together. Of course you have to pay attention with the "main use" of the different output voltages, that there are no connections established which in combination with a common ground could cause a short circuit.
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  28. @Polpus In Euro circa 1400 + 25 di spedizione. Lo stesso tipo in Francia costa 1700. No, non ho avuto modo di provarlo prima perchè è un modello nuovo. Ma è molto probabile che mi soddisferà a pieno, se le caratteristìiche sono quelle indicate. Quando arriva ti faccio sapere come va. Dovendo anche tu fare l'upgrade della ruota ... magari ci fai un pensierino
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  29. They are BLDC, PMSM are somewhat uncommon but there's not even an actual agreement as to what defines BLDC vs PMSM. You will see the terms interchanged often.
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  30. I have one question and one remark Question: What type of motor is normally being used in our EUCs? Is it a BLDC or a PMSM? There is often a confusion of terms, I think a special BLDC motor with sinusoidal back EMF caused by an accordingly wound stator is mostly called a PMSM (permanent magnet synchronous motor). This can be seen when a scope is connected over two phases and the motor is turned manually. (Is that correct?) The standard hoverboard motor in a 6.5" wheel is of that kind. Remark on regenerative braking: As esaj himself pointed out, all alternatives are unreasonable. On t
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  31. Back to topic......today i disconnected the speakers of my KS-16 and i can report that this electric spark sounds are not from the speakers. They are coming from inside of the motor.
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  32. It sounds like the charger is working normally. You said you also get 66v at the red Dean's connector inside the EUC with the charger plugged into the EUC charging port and plugged in right? That would mean your charging port and wiring appear intact so that leaves us with the battery basically. Is it a 67.2v battery? If you don't want to deal with taking the pack apart maybe bring it into a battery shop or ebike store to get a quote for repair costs. They might have the shrink wrap plastic on site there to cover it all up afterwards. It kind of depends on how do it yourself you are
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  33. $520 Gotway MCM3 $1,000 Gotway MCM4 HS 680wh + extras (not yet shipped) $300 replacement battery (360wh) for MCM3 (could have gotten this cheaper) ~$50 EUC related accessories. (padding, fingerless gloves with wrist support, LED lights, grip tape, pump, multimeter, etc.) $32 Charge Doctor v2 Total: ~$1,902 Wow. Now just wait until I get an MSuper! The expenses will be through the roof, I'm certain.
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  34. Look at the handle bar in the factory pics vs the MSuper3 mockups. The factory pics are of the old MSuper v1/v2 design. Plus the fact that the pic shells have no front/back lights whatsoever. They're probably pressing up new MSuper2's to clear their parts inventory to prepare for the MSuper3
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  35. FWIW, I was told by Jane the same thing, but Linnea told me it was not coming out that fast (this was all back around April 1). If this was coming out that soon, wouldn't there have been pictures or video of a prototype at the Gotway France booth of the currently ongoing Foire de Paris? (none displayed in the pics on their FB page https://www.facebook.com/gotwayfrance/?fref=ts; ACM had pics & vids prior to launch) This talk of May just sounds like typical Asian business tactic of keeping the buyer from walking elsewhere. That said, whenever the MSuper3 launches, I'll
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  36. I have some experience with them, though I didn't end up completing an order from them. Like @KaleOsaurusRex says, they're very upfront and honest with the preorder situation. For me, it became apparent that they were unsure about the timeline of delivery, so I spoke with him and he offered a refund on my preorder same day. No hard feelings. Will is an upstanding guy, so I don't think anyone has anything to be concerned with in terms of ordering in stock wheels. I'd have a hard time believing he's done anything malicious. But by his own admission/prediction above, it does seem like he do
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  37. I hear that it's best to keep the battery charge somewhere between 20% and 80-90%? Also I think the range may improve after the batteries have been cycled a few times, or that's what I've heard. I don't worry about it too much and run mine down to the low battery beep on occasion, and I charge it up full. Of course, I have an el cheapo generic so I don't care that much about it. I did order a Charge Doctor which apparently stops charging automatically when it hits 90% or so to maximize battery life. I don't think it hurts to top things up from a mid-charge. You just don't want to de
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  38. @Chriull I agree with you , this Mod has to be performed on a low power cheap EUC , I did not stop myself to analyze which kind of mosfet is mounted , just cuz all in all I do not expect electronics of these industrial poor entry level machines to be so sophisticated to be affected by a bunch of cms of cables . The same copper used for electrical net/pads is a very bad quality one . . . Anyway my EUC actually has the same behaviour BEFORE the mod , so it is functioning GOOOD ! (If something happens I'll post here..)
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  39. Peeps thanks for your comments. Capacitors wires are pretty large and not so long. I exlude inductive problems. Also MOSFET wires are the biggest could be soldered on PCB avoiding short circuit. Today 10 kms ride with often Speed max reached and no problems...
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  40. @baltimorecity , if you are totally unfamiliar with 3d printing it may takes more than you expected ... my suggestion is to take a project already done (search it on thingiverse, it's free) and let it be printed by some specialists you can find in internet (they can ship your project) . Otherwise you may consider repairing the shell with fiberglass or /and other epossidic resines ..
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  41. 1) I have faceplanted on a 18", due to very slippery pedals/shoes while riding in the rain. The tire grip to the road was great thou. 2) I have faceplanted on a 14" due to overspeeding cutoff. Clear weather and dry road. *Overall, the 14" has proven to be the more dangerous wheel by far. Way easier to have accidents on it due to low height pedals, and lesser off-road capability. Most of my accidents have been on the 14". I also will have a 16" soon. Fun!
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  42. 49km and 6 hours (1hr beer and food break included) ride in Paris, with an itinerary carefully crafted by Denkam. The weather was great, spring is finally here, and with Denkam you always are in for discovering unexpected tiny streets, and, of course, cobblestones. That's Denkam's signature...
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  43. http://microworks.m.en.alibaba.com/productlist.html has a good stock of decent quality components
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  44. When the student surpasses the master........sad face:(
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  45. Found this on Gizmag: http://www.gizmag.com/franky-zapata-flyboard-air-video/42734/ What's damned impressive is the flight time/speed, 10 minutes vs 30 secs for the Jetpack & a death defying 150kph. It seems highly improbable for any air/levitation to ultimately to become commercially viable due to energy intensity of fighting gravity, but hey, 50year ago the Wheel seemed like pure fantasy...
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  46. Now I here are some 'Advanced Spectrum' app snapshots of the KS16. I took my mobile into both hands (approximately 40 cm in front of me) and did not bother to bring it closer to the EUC. I can confirm Jason McNeil observation ( 6kHz, 12kHz & 16kHz) on his KS14 also meet the KS16 one. However, I'd like to point out, that the decibel amplitude levels of the KS16 (between -58 and -40 dbFS) are significantly louder than the KS14 (between -80 and -70 dbFS): As I and propably many others cannot hear 16 kHz let's focus on the 6kHz and 12kHz peaks. @OliverH and Jeffrey S
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  47. I believe that it is important that the motor and controler are matched and if you bought a controler that wasn't specifically marked as being for a 16" then odds are that it's for a 14" as generic wheels are predominantly 14s and 16 inchers are relatively uncommon.
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