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About Scatcat

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    Advanced Member
  • Birthday 10/04/1966

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  • Location
    Gothenburg, Sweden
  • Interests
    Computers, Sci-fi reading, EUC, Vaping
  1. Been there done that, except my speed was maybe 15mph and the bloody speed-bump was the 6" variant. Got airborne, then landed back on the pedals with a "THUMP!" Stupid thing, was that I had gone over three speed-bumps just before this one, and got the idea in my head that those were all that was, picked up my phone to check the app for some reason. So I must have looked pretty silly staring at my phone while being pushed straight up in the air......... GOOOOD I felt stupid.
  2. Gaaaaaah! I'm already looking at my bank balance and starting to rationalise how it really wouldn't hurt so much to make a z-shaped hole in my savings...
  3. OK, I've taken mine down to <20%. I got 80%-power warnings more and more frequently as the battery went below ~50%, but then I pushed on quite hard, so that is kind of natural. I did not get any tilt-back until I came down to 20-25% power, and then only when ignoring the beeps. The wheel was fully rideable down to maybe 15% or so. I had to take it easy for the last mile or so, but got home alright. The difference between this control-board and the old one is rather drastic. The old one had close to no safety features at all, while this one warns me if I reach 80% and does the tilt-back if I push even harder. The beeps are twice as loud as on the original board. It seems a bit more power-hungry than the old setup. I don't know if that is caused by the motor or the board, probably a combination. I think the smoothness of the new motor and board (I feel like I'm floating), means I'm using more power without noticing. I do seem to trigger the speed-alarms a lot more often... All in all it's both a gratifying, and a bit annoying experience. The general silence of the old board, without constant power-warnings etcetera was pretty nice in its way – but also somewhat scary, knowing that only my own discipline kept me from face-planting. Now I feel a lot safer, but also feel the alarms kick in too quickly. I get the beeps even if the >80% power push is just momentary. Like going up a ramp from my basement door to the pavement. The climb is just 8-10 feet long but the elevation is somewhere in the range from 70-80%. Of course that means I will push beyond the 80% warning, but the beep comes just as the climb is already over – luckily without any tendency to tilt-back. Wouldn't that be fun, getting a tilt-back in a 80% climb? I'd probably look like a clown in the circus, waving my arms to retain my balance and then going down again.
  4. Well, obviously I like the Rockwheel GT16, aesthetics where clearly one of the reasons I bought it. Still, there are a few things I would change if I were the designer: I would have it cover a bit more of the wheel front and back, and would try to make it less boxy in the top middle. Another wheel I like the looks of are the Gotway MSuper V3. I like the way it leans backwards, and I think it looks sturdy in a pleasant way. You get a feeling of rugged power. The ACM is also a very nice-looking wheel, its smooth circular and slightly angular bulbous form feels right in some undefinable way. The Solowheel Xtreme is another wheel with the flowing leaned back look. But when I see it, I see form over function, which mar my appreciation. It should pack more power and juice, which would make it fatter and heftier. To design a "beautiful" wheel when you don't have to find room for the actual hardware is simple. I like the KS16, especially in rubber black, it is part design like the ninebots, inmotion and segways, but part is also rugged power.
  5. It reverts to walking mode when the app connects. If you're actually riding, you can feel it happening just as the connection is made. It seems to be a problem in the app, that doesn't read the mode before it initiates. It seems the 1030Wh version is a bit more stable over the percentage span when it comes to max-speed. But still, I haven't had any strange behaviour down to 45% or so. But I do get tilt-back if I try to push it above 80% of max power at any charge level.
  6. Sounds strange, but frankly I haven't gotten down to 40% with my new board yet. Since I assembled it, there have been precious few days with nice weather, and the longest I've gone at once was when I wen't about 25-30km to buy a protective jacket. Cruised around a bit and got down to just above 40%, maybe 45% or so. Had no strange behaviour at that level. I'll be sure to report back if there's any strange stuff happening at lower charges, or for that matter to report if there ain't Yi Chen noted that the only "mode" that is truly compatible with GT16 is "playing mode". I have had some strange tilt-back situations in "walking mode", but only with this board, not the old one. This board also seems to have a lot more safety features built in. Is your tilt-back in "walking mode" and have you tried switching to "playing mode"?
  7. Or just licence the Simeray patent and dare Shane Chen to sue them. Show prior art, and the patent goes out the door.
  8. Isn't that quite often the problem with the patent system? The bar for a new patent if quite often very low, and the competence of the patent officer within the field of the patent is often execrable. So you make some changes, apply for a too broad and general patent, then use that patent to effectively nab the patent space of the old patent. Then you use your patented "invention" to punish those who didn't swindle the original patent holders of their intellectual property.
  9. I'd say the efficiency of the motor feeding current to the batteries is pretty high, but as long as we depend on lithium batteries, the charge they can take is pretty low compared to the current they can hand out.
  10. Yeah, i really loathe that "good enough" attitude, it's neither good, nor enough.
  11. I understand why @Pingouin called them out. I might have done something similar, getting pissed off by their idiocy. But I think I shouldn't, not one against many, and they demonstrably stupid and aggressive. A camera is a brilliant idea, if you get enough clear footage to identify them and document their behaviour. But don't go call them out, take the footage directly to the police. Trying to run someone off the road is illegal in just about every place in the world AFAIK.
  12. I think quality is not an issue as such. GT16 has some design problems, and some of the same problems other designs are plagued with, but I can't really see that they are any worse in QC than let's say Gotway. What they lack is a good sales and support organisation. And the design-problems that I think are most in-your-face are the waterproofing and how difficult the GT16 is to take apart and service. Too many nooks and crannies, too many parts you risk breaking when you dismantle it. But it is not THAT hard, I'm a f-ing amateur, and I've taken it apart at least ten times by now. I could wish the design was easier to handle and a bit more sturdy, but it works. They should probably both take a leaf from Kingsong's books and lacquer their boards, as well as set reasonable and hard limits. All of them should also study best practices when it comes to heavy duty electrical engineering to avoid overheating, melting insulation, popping FETs, arching plugs, broken hall-sensors and so on. They should up the margins of error as well as margins of physical fatigue. They should make sure the support for the rider is adequate, with larger pedals, better padding and a reasonably natural stance when riding. It sometimes pisses me off to know how close they are to building the perfect EUCs, and then they don't. Think about it, how much more expensive would it be to build: Motors with inch-thick shafts, which wont break and would give ample room for... Battery and motor cables of 10-12AWG and silicone insulation. Hall sensors that have good support from a pcb, and can take high impacts and vibrations. Heavy duty FETs with redundant circuits. Triple gyros, where one can fail, and the two other will override it. Waterproof battery packs, cabling and board. Personally I think that would be small change compared to the total cost of manufacture. Yes it would be a few dollars more expensive, but who wouldn't buy that EUC given it still had the rest of the things we want? That is, torque, speed, stability, agility, responsiveness and range. Cool design too of course, but none of the big brands fall short in that category, not really.
  13. The new board is subtly different from the old. One thing is the implementation of a power-alarm and tilt-back. If you get over like 80% or so of available power, you get a double beep and tilt-back. It took me by total surprise, and I'm quite happy the tilt-back in the GT16 is not the violent kind. I'm not certain I like it unreservedly, it seems to trigger on peaks as much as steady power. While that is pretty safe, it may be overly conservative. I've just had one occurrence, so I'll reserve my judgement for now. I have a tendency to accelerate pretty violently, but not go at very high speeds - seldom more than 22mph or so. But this triggered when I made a brutal acceleration from almost stand-still to maybe 15mph, suddenly I got a double beep and then the pedals leveled to horisontal. A fat reminder telling me to back of or else... As I said, the event in itself was more surprising than scary in any way, the tilt-back is so smooth that the only effect is you not doing whatever you were doing to trigger it anymore. The "walking mode"/cruising mode seems slightly softer than on my old board, and it nudges you to take it easy with small tilt-back tendencies if you try to push it to hard. Not tilt-back in the normal sense of the word, more like catching you from over-leaning by acting like some sort of spring suspension. There was some of that in the old version, but it's more pronounced now. "Playing mode"/Hard mode is nippy as ever. One very happy thing is that the alarms are MUCH louder than on the old board. Other differences is the feeling the power use is slightly more aggressive and/or that the motor is in better condition. When I go up slopes that was in no way a problem before - then now they're even less of a challenge, to the point I hardly notice them. Especially going up at slower speeds there isn't even a change of sound in the motor to signify more power used, and the pedal response hardly changes from flat ground. I can slow down, speed up, carve or go straight, like it was flat rather than 15° uphill. The new motor is less noisy overall, both the noise of rotation, and the high-pitch hum is distinctly lower. Still loud, mind you, but not AS loud. So all in all, I recognise my EUC, but I also feel there are some differences between 1.2 and my current 1.4...
  14. There you are.