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Showing content with the highest reputation since 03/27/2017 in Posts

  1. 23 points
    The story of how I and two fellow wheel riders became lost in the mountains and lived to ride another day. As I begin this, it must be said that I'm the one with poor judgement in this story. Well intentioned, but... The Cogswell Dam, as I've previously written about, is a gorgeous area to ride an EUC. It's basically a canyon ride on the northern side of a mountain ridge. I've ridden it twice before. Throughout this region are countless trails, large and small. One of the most well known is a four wheel drive capable trail called the Rincon Shortcut OHV Trail. It stretches along the southern side of the ridge that is shared with the Cogswell Dam. The Rincon trail-head starts about an 1/8 mile south of the Cogswell Dam trail-head. Up in the mountains there is a connection between the two, and that's what I've been itching to try. Complete the approximately 30 mile loop that joins the two trails. So I coordinated a group ride for Saturday morning, and my long time riding buddy @jrkline was the first to commit to the ride and not too long afterwards @Ando Melkonyan eagerly committed to the adventure (he had his newly acquired ACM). We were to leave by 9:30am, traversing the southern (Rincon) route first, taking advantage of the coolness of the morning air. Eventually we would meet up with the Cogswell Dam trail high up in the mountains and return by way of the shaded northern trail to avoid the extreme heat of the day. Oh, and today was the peak of a mini heat wave in Southern California, where the temperature was predicted to be in the low 90's. Maybe we should have brought more water. Hmmm. @abinder3 joined us at the very beginning. He didn't have time for the entire route (regardless of his reasons that was a good decision in hindsight) and therefore was just going to ride to the dam and back, about a 20 mile roundtrip. But it was nice that we could all meet at the beginning and share a few stories before we went our separate ways. In the picture above, from left to right: @abinder3 (Allen), @Ando Melkonyan, @jrkline (Jeff), and myself. Don't we look happy - if only we knew what was forthcoming I had my Monster which I had previously ridden here twice before. Jeff had the FrankenACM - I know, I know, his world famous 2040wh ACM. As would be demonstrated throughout the day, his ACM never fails. It may not be pretty but it's a faithful workhorse. And Ando brought his 3 week old ACM with a 2-1/2" tire that he managed to fit on the wheel. He had to cut away parts of the shell to make it fit, but he turned it into a really nice trail machine. We finally began our journal and after a few hundred feet wished Allen well as he exited for his trail head. We continued on the two lane highway until we came upon the locked trail gate, representing the entrance to our grand adventure. After bypassing the gate we began our journey in earnest. On a previous outing to Cogswell Dam I had ridden this part of the trail for a mile or so and was hoping the whole trail would be as I remembered. And for the most part it was, perhaps a little steeper in sections. But remember that this is a four wheel drive trail so certainly any path that a truck can take we can tackle easily on our EUCs. In this video you can see me struggling a bit as the ACMs zoom past me After a few miles of steady uphill climbing I was beginning to think that I should have taken my ACM too instead of the Monster. I've ridden my Monster a lot in the mountains now, but never for extended uphill pushes. We were on a trail that was to continuously climb for over 3500 feet. And this wasn't a paved road. It was gravel and sand mixed with large rocks and various ruts. So there was a lot of maneuvering involved, slips, slides, near stalls, and periodical jump-stops for the wheels. Although I have experience with the Monster and know that it's capable of ascending any hill that the ACM is, it does so extremely slowly and with much effort. As Jeff and Ando zoomed up the trail sections with hardly any physical effort, I was in a near constant crouch and heavy lean. Plus all of the effort required to steer the 70 pound Monster ... But I was hanging in there despite the ridicule coming from my fellow riders ;-) Fairly early on we had our first crash. I must say, anybody who wants to keep their wheel pristine should never do off-road trail riding. It's a messy business. My Monster requires a wide berth and although I always have my trusty helmet mirror, I have some rather large blind spots. Jeff was apparently unaware of these facts. As he was overtaking me on my left I was slowing sliding left. Our pedals locked and in the next moment we were both sprawled on the ground. Jeff's bloodied forearm and my bruised ego provided good entertainment for Ando :-) Here's a couple pictures of the aftermath: We continued the long climb, but I was getting tired. At one point Ando offered me his ACM while he pushed forward with the Monster. And then he proceeded to demonstrate a new technique (to me) for getting the Monster up hills fast. Jeff and I had great fun watching this and I think Ando was having fun to. It looked like he was riding a horse, but indeed it really moved fast. When I started riding the Monster again I used this technique and it really helped. But it was still hard on the body because of the lean, and steering was proving difficult. Eventually I discovered that if I was in a squatting position and squeezing the wheel between my knees, AND using my knees to force the wheel forward, the Monster really moved. This was exhausting however. We were still having a good time, enjoying each others crashes and Ando's music Somewhere near two hours we finally arrived near the peak. I was beat. Now we needed to find the trailhead that led back down to the Cogswell Dam. We came across a lone mountain bike rider that pointed us in the general direction that we needed to take to begin the descent to Cogswell Dam. In the following thumbnail you can see the Dam far below us. Here is where I made the fateful mistake of picking the wrong trail. It went down and looked to be in the general direction, so let's go for it. I really should have spent as long as I needed to be sure, but in the back of my mind I figured if it was wrong we'd probably realize it fairly soon and just backtrack. What I didn't take into consideration was my failing body :-( As we proceeded down this trail it slowly got sketchier and sketchier. First there were small dead falls (trees that fall across a trail) and then bigger and bigger ones where it took minutes to carry and or drag the wheel across. I was getting weaker. I had no more food and none of us had any more water. Remember that I said it was going to be in the 90's today. I felt like I was beginning to get symptoms of dehydration - shaky legs and arms and extreme fatigue. I could only ride 20 feet before I would loose control and had to stop and rest for a few minutes. By this time I had a few more rather severe falls which further hampered my ability to ride the wheel. Besides my difficulties, it had become clear that we were somewhat lost. This was certainly not the trail to the Cogswell Dam. I could simply not go further. At this point I was with Jeff. Ando had explored further along the trail and when he returned he said that he found water (we could hear a stream in the distance below). You don't know how excited I was to hear this. I felt that maybe if I got some water I may recover enough to continue at some level. Jeff took my empty water bottle and disappeared down the trail to return with water. I was feeling a bit mentally refreshed. While Jeff was away Ando and I tried to figure out exactly where we were. I had offline Google maps in my phone and a Garmin 60CS handheld navigator. BTW, GPS reception was not great within these mountains. But we eventually determined our exact location. Miles from the trail that we should have taken. I had arrived at a difficult decision. Like the sailboat captain in the middle of the ocean that grapples with the decision to press the emergency beacon, knowing that when he does so he will be rescued but his boat will be left behind, gone forever. But I knew that I could not continue back uphill to retrace our steps by a few miles and then down another 15 miles. Impossible. So I told Ando to leave me and get back to the area where we made the bad turn. In that area there was a line of site to the greater Los Angeles area and there was cell phone coverage. "Tell them that a person was suffering from exhaustion and dehydration. Call 911". Now by this point at least 15 minutes had passed and Jeff probably should have returned within 10 minutes since Ando knew the water was only 5 minutes away by wheel. But we continued to wait. While doing so Ando took my Monster and rode/carried it up the trail past a few of the sever dead-falls. And then walked back. Amazing, and as you'll learn in a bit, very important that he did so. Still no Jeff. Instead of sending Ando to look for Jeff I suggested that he go the other way, and I'll wait for him. So Ando disappeared with his ACM and I was alone in the middle of what felt like nowhere. I think it was about 3pm at this point. I lay on the ground and was anticipating a bottle of water with great joy. Maybe another fifteen minutes went by. Nothing. Then I started thinking, "Maybe something happened to Jeff. Was there an accident. Did his ACM break". I slowly started walking down the trail. 20 steps and then lay on the ground to recover. 20 steps, lay on the ground. I did this for maybe 15 minutes but realized that if he was hurt or the wheel was broken I was in no condition to help. And I had told Ando that if possible I would try and walk back to the trail junction at the top of the mountain. So I abandoned Jeff and ever so slowly started walking up hill. 20 steps, lay on the ground, ad nausea-um. I still had hopes that Jeff would return with water. I would have given away my Monster for water at that point. It really was horrible. At this incredibly slow pace I managed to get past the large dead-falls. I never would have been able to get my Monster past these obstacles in my condition. Eventually I found my Monster and could not believe how far Ando had taken it for me. I then proceeded to push it and myself up the trail, in spurts of low speed energy. A trolley handle may have helped, but just the effort of pushing the Monster and walking was too much. After maybe an hour I decided to abandon the Monster, knowing that I would never see it again. I wasn't worried about someone finding and taking it. First, nobody sane travels this impassible trail, and if someone did they wouldn't know what it was, and at 70 pounds I don't think they would try and carry it out. No, I would never see it again because I would never be able to get in here to recover it. That would entail hiking 15 - 20 miles which is a long hike on flat ground. I just didn't see myself being able to do that. I marked the location where I did leave it, in my Garmin 60CS thinking that I would post to Facebook and the Forum with the coordinates and anybody who thinks they could retrieve it could keep it. No bad feelings on my part. Anyway, it was load off my mind when I fully committed to never seeing it again. Let that be a strong reminder to what not to do in the future. I continued the painfully slow march. I was worried for my health because I know dehydration can be bad. But I tried not to exhaust myself too much. Walk for a few minutes and then lay down. Walk, lay down. Minutes turned to hours. I was thinking maybe if I eventually got to that magic "cell phone coverage" area that I could call 911 in case Ando wasn't able to. It's amazing what goes through your mind when you can't communicated with people who are trying to help you.What happened to Jeff? Did Ando make it out yet? Knowing where we had last all been together I was thinking positive and assuming that Jeff decided to explore that path beyond the river and went so far that he decided not to return with water. I knew that particular trail wound its way back up to the top of another mountain range to the 2 freeway which then led to civilization. So if he got out he would be able to call. But I had my doubts that we would have enough remaining power to climb another couple thousand feet and maybe 20 miles. I kept think that if I get rescued I'm going to have to tell them about Jeff so that they can search for him next. After maybe 3 hours I came across these maintenance trucks and construction equipment that we had passed on the way down. I opened every truck and door I could get into and FOUND WATER. Two old water bottles with maybe a 1/3 full of water each was an amazing find. First I sniffed it to be sure that they weren't storing fuel and then guzzled them down. Water had never tasted to good. Although it did not help with the exhaustion in my legs, it did help with the thirst and made me feel like I actually wasn't going to collapse somewhere up here in the mountains. I continued to walk, imagining what might be happening with Ando and Jeff. And then of course I was worrying about my wife because in the absolutely worst case I probably should have been home by now. But there was nothing I could do. She did know the general trails that we were taking (at least I got one thing right), but it would probably be very dark before she pulled the trigger and called 911. So I was still prepared for a very much longer day and night. Dusk was approaching when I started to hear a helicopter somewhere in the distance. That was the first mechanical sound I had heard for hours. I thought I heard a plane too. I did see the helicopter at one point but it was miles in the distance. Amazingly I had made it back to trail junction where we made the bad turn. And then I heard and saw a large search and rescue type helicopter hovering over me, but very high. I was in an area where there were power line towers (thus the maintenance equipment found earlier) plus I'm sure they generally stay far above the trees. I waived both my hands for a little bit and then it moved off to the distance a bit and hovered again. Then it left. "Well, that's it. I've been found and now help will be on the way". That was a huge psychological lift for me. So I continued to walk, and walk, and walk. It was now totally dark, after 8pm. Fortunately I had small pen flashlight so I could see the path in front of me. No longer fearing collapse from dehydration I could start contemplating coming across bears or mountain lions, both of which live in these mountains. What joy! I then spotted a brief flash of light followed shortly by a truck rounding the corner ahead. You can imagine what I thought at that sight. It eventually slowed to a stop beside me and I was asked my name (I guess they didn't want to pick up the wrong guy) and let me in the truck. There were four uniformed men in there, all volunteers for the Sierra Mountain Search and Rescue. They gave me all the water I wanted and bagged peanuts. Life was good. Shortly after I got in the crowded vehicle I asked if they happened to know about any other ..., and before I could complete the sentence they told me that all three people have now been accounted for. So Jeff was alive ;-) I assumed Ando was good because otherwise I probably wouldn't be sitting in the truck at the top of the mountain. Now get this, they then asked me, "do you want to go get your 'bike'?" Are you kidding me? I tried to suggest that I didn't want to put them through the trouble (I really didn't), but they insisted. They said that they were already up there so why not. It probably took another half an hour and a locked gate to get within a few hundred feet of where I left it. The last bit had to be walked since the trail conditions were too severe for the truck. So I actually got my Monster back. It felt like I just received a new wheel because in my mind I given it up for lost. As we drove down the mountain for the next 1-1/2 hours I learned that Jeff had been recovered on the 2 freeway, and Ando was the one that called it in. Eventually I met up with Jeff as we were brought together at the base of the mountain to be driven back to our vehicles (20 miles away). There Jeff told me how he amazing made it back up to the highway on the other side of the mountain range and then down towards town, almost on a zero battery charge. His 2040wh ACM truly has been an amazing wheel. I also learned from the rescuers that the helicopter had not seen me! Amazing. The guys said that in the future you should lay on the ground and move, otherwise all they see from above is a head, and that's hard to distinguise from everything else. So they found me based on what Ando was able to tell them. You can read some of what Jeff encountered here: And then when I finally got home around midnight (having left in the morning at 8am) I eventually read about Ando's experience which was amazing in itself. His ACM has also proven to be an amazing wheel. Essentially going 10 miles down mountain trails with almost no battery power remaining. You can read is account here: And here is the dam (it was not Cogswell after all) that Ando got to: And the 911 help that arrived after he made the call So there you have it. I think none of us will forget this ride. It's been four days and I'm still having difficulty riding, which really surprised me. When yesterday I hopped on my KS14C for a short utilitarian trip I almost crashed as the wheel was very wobbly. I had a hard time turning. It was then that I realized that my legs were still weak and uncoordinated. Amazing. Although I declared that I wouldn't do this again, time heals all wounds ;-) I know Jeff is up to doing it again, and maybe Ando will be to. We will be better prepared next time. More water, food, maps, only ACM's or the like, and a bigger breakfast. Oh, and Jeff says he'll bring his ham radio (which hopefully will not be needed). I hope you enjoyed my little adventure story
  2. 20 points
    My whole body is starting to stiffen up as I type this Unfortunately there's no video. I was cruising with my Monster to some good tunes on a very nice curvy sidewalk. Probably 15mph max - the tunes were definitely pumping up my speed There was an outside curve that had hedges pruned right up to the edge of the sidewalk. You know where this is going right Just as I was thinking my speed was a tiny bit too fast for the curve and the bushes seemed like they might juuuuust brush my feet - Bam! The left pedal caught, the wheel stopped, and I flew off the right side, twisting as I caught some air. Landed on my right and slid on the adjacent dirt/grass very hard. Kind of knocked the breath out of me and for a couple of seconds I thought that this might be the fall where I break something (something personal, like a bone). I lay there for 15 seconds and then slowly started moving, not wanting to injure something worse in case I was broken. After about 5 minutes of very slow movements I was able to climb back on the Monster (which seemed to be unscathed) and limp home. My right hip, groin, ribs, arm, and shoulder feel like they participated in a Monday Night football game, without my permission. The one positive take away is the reaffirmation to wear full protection when I'm going to be out riding fast. In this case I was wearing a long sleeve shirt, gloves, elbow and knee pads, and my helmet (which I wear even when I'm not going fast). Tomorrow is not going to be fun
  3. 16 points
  4. 14 points
    My new Gotway Luffy received a facelift today! Since Luffy will soon be headed to a pediatric rehab center for study I figured she will be tossed around a great deal and suffer from irreparable trauma so my staff and I fabricated a plastic protective outer shell. First Luffy was encased in plaster using bandages that are traditionally used for stabilizing fractures. Once the plaster bandages hardened they formed a replica of Luffy's shell.. The plaster shell was then carefully removed from Luffy. This required using a cast saw and then slowing spreading the plaster bandage to dislodge Luffy. The plaster shell, called a negative mold, was then poured will plaster of Paris and a pipe mandrel was inserted in the center of the mold. The mandrel allows for the mold to be placed into a vise for modifications and also provides a conduit for our vacuum system to extract air (discussed later). Once the pored plaster hardened the negative mold was removed exposing the positive mold. The positive mold has tiny flaws which need to be smoothed and filled. Once this modification is complete a cotton stockenette membrane is placed over the positive mold. This allows for adequate vacuum pressure and even atmospheric compression during the plastic draping process. We used 3/32" copolymer plastic for my protective shell. It has flexible properties but is rigid enough to handle bump and spills. The copolymer sheet was heated in a large infrared oven to 350 degrees. Once the plastic sheet was at the proper temperature it was removed from the oven on a caster type table and then the colorful transfer paper was applied over the plastic.The paper has specialized inks that literally transfer into the hot plastic. In my pediatric practice we have over 50 colorful patterns kids can select from for their orthopedic braces. The table holding plastic sheet was then rolled over to the positive mold and with the assistance of 2 of my staff the plastic was carefully lifted and draped over the mold. A vacuum pump was then turned on and the plastic was completely sealed around the molded so there were no air leaks. The vacuum pump then withdrew any remaining air inside the mold allowing the atmospheric pressure to gently form the plastic around the mold. Once the plastic cooled it was cut from the mold and taken to the shop area where it was further trimmed and ground smooth. Once the shell was complete velcro straps and padding were added. There are much easier methods to protect your wheel from abuse but this was a fun project and should make the kids at the rehab center very happy!
  5. 14 points
    A quick spin on the new Rockwheel GT16 @captainwells just received his new GT16 and was gracious enough to allow me to ride it for 6-7 miles. Periodically we ride the Southern California beach together and as I was riding out to meet him he said that he got his Rockwheel GT16 (ordered in early March) and was wondering if I wanted to see it. "Are you kidding me" So I dropped my 1300wh ACM off at his house and took the GT16 for a nice long ride down the Strand and associated paths. He rode his KingSong 16S (which I got to also ride on the return leg). These are my initial observations. I, like many people, really like the looks of this wheel. It may not be as practical in less sunny climates as Southern California due to the very exposed wheel. But it has the cool factor going on. As previously observed, the slide out mud guard also rubs on this wheel, so it appears to be designed that way. If you slide it halfway in it no longer rubs. The pedals are not floppy (@Rehab1 will like this), but they are small. On the other hand during my 7 mile ride my feet felt comfortable. My feet feel less comfortable when riding 7 miles on my KS14C. They have a soft rubber layer (not coating) that was half attached on one of the pedals. Maybe that contributes to the comfort level. But I suspect they might be very slippery when wet. Again, no problemo in Southern California Also as mentioned elsewhere, the two rubber pads are not attached on the top. They flop away from the wheel easily. Very odd. We can't see what purpose leaving them not attached could be. But they are very comfortable on the legs. My only reference for this wheel is the ACM. The GT16 weighs substantially less and looks much smaller. Yet it is a 16 inch wheel and the tire is just as wide as the ACM. I did observe that the tire tread is much less aggressive than the ACM, which isn't particularly aggressive. Relating it to bicycles, the tire looks more like a road tire (smooth tread in the middle). The power button is under the handle and below the surface of the soft top plastic. So it's fully water proof. It's location is a good thing because like many other early wheels, it turns on and off instantly at the press of the button. So you wouldn't want to accidentally bump the switch while you were riding. Most other wheels require you to press and hold for a second or two before they turn on or off. Now the fun part, how does it ride? Fast, very fast. And extremely nibble. I have to say, I loved riding this wheel. It feels like it has all the oomph (that's a technical term) of the ACM, but since it's lighter, it feels like a faster accelerator. The ACM is a 'dense' wheel and sticks to the pavement, making it feel like a very stable wheel. The GT16 does not feel like a stable wheel, but in a very good way. It handles like a 14 inch wheel. But here's the thing, and I'm not sure why this should be, but it feels much smoother than a comparable nimble wheel. When I rode the KS16S on the return it also felt very nimble, but was noticeably less controllable than the GT16. It's very responsive (no pedal dipping). Those of you who don't like the relative softness of the Gotway wheels will love the GT16. I do. We rode to the end of the beach path where there's a very steep path to the upper parking lots. It's a good test. The GT16 flew up the hill. And since there's not a lot of history with this wheel I wasn't trying to really push it. But I was able to accelerate up the hill and it felt very perky in the process. Much perkier than the ACM. We'll have to take the GT16 into the mountains to really test it's raw power, but my impression is that it may out perform the ACM. Of course I have no idea whether it's prone to overheating, or whether it's reliable. But I really like riding this wheel - it's a blast. There's one oddity that @captainwells first observed and you may be able to hear it in the video. The wheel emits the typical whine that you expect from these powerful wheels, and my impression is that it's a lower pitched whine compared to the Gotway. But, in addition to the whine there is a very noticeable crackling sound. The best analogy that we can come up with is the cracking sound that you hear from high tension power lines. We joked that we hoped that there weren't a bunch of sparks going on inside the wheel I have to say that now I really want to buy this wheel. But I'm married, so you know where this is going. I have four really nice wheels, none of which I would want to swap for the GT16. So somehow I have to subtly purchase it without making her think that I've lost my mind Does anyone really need 5 very nice wheels (I'm looking at you @captainwells)? Of course @captainwells has a lot more time on the wheel than I do, and he can talk about the app and such things. So if you have more questions he may chime in. I may let him break it in for a few weeks, and if it doesn't explode (that crackling sound) I'll most likely be pulling the trigger
  6. 13 points
    I like leisure trips with my Ninebot along the back pathways, but what's more satisfying I find is when I drop my car off at the service station for work, take out my wheel and ride home. It's a subtle difference, but last night I rode all the way across my quadrant of the city along some new areas I've never been to. I crossed busy streets where you never see people crossing and of course I got tons of stares. I could feel the eyes tracking me as I rolled along. I made sure not to overlean and do a faceplant in front of everybody. Gotta keep your cool and represent. My city is quite heavily reliant on cars and buses for transportation so the sidewalks and pathways are mostly empty. It's a little scary crossing large intersections where you normally drive across, but it's also cool to roll by all the stopped cars and know they are looking at you. I snuck past a cyclist who was like "WTH is that..." and several cars slowed down to rubber neck. It's so nice and liberating to have that little vehicle take you safely home without needing someone to give you a ride. I still had half a battery charge at the end of the trip. When I checked the map of my trip, I was simply amazed at how far my battery pack took me. I know it's only about 12 kms, but when you see it one way with all the houses and streets zoomed out on Google Maps it's just mind boggling how much energy is stored in that pack when you compare to walking the same distance or even biking it. It must be crazy with the longer distance wheels... so much range!
  7. 13 points
    Continuing my backward riding practice, today I take my MSuper V3 to the bottom of the San Gabriel River to work on my steering and turning skills.
  8. 12 points
    I'm a 79 year old professor, about to acquire a second-hand E+. 60 years ago I rode a unicycle (pedal-powered), and hope some of those ancient skills will enable me to adapt to this new device. I need some sort of portable personal transporter because my knees don't support walking (osteoarthritis hates impact), though I'm otherwise quite fit. My goal is to efficiently traverse the very large campus on which I still teach. A few questions of the resident gurus... Price with training wheels is about $300 - does that make sense? Is the E+ UL-2272? Campus requires it! When I inspect the unit, what should I look for regarding functionality/safety? Remember, I won't be able to ride/test it until I adapt/learn, which will take some time. Is there a way to estimate the condition of the batteries? Is it powered by a simple array of replaceable 18650 cells? Do the training wheels accelerate the learning process, or improve safety? I have a helmet - do I also need bodybubblewrap or ??? Will initial training be enhanced by a shopping cart? If I fail to adapt, will I have a problem finding a buyer in that price range? I'll be grateful for comments/suggestions, other than "Don't do it, you idiot!" Thanks, gurus.
  9. 12 points
    Hi. This is my third euc and my first quick review. After a couple of mounts and 669,9 km. think I can show how is riding this euc and gonna try in English, not my native language, pls forgive my bad grammar. The incorrect information from inmotionIberia of max speed and range where it says 40 km/h and 40km but may say 25 km/h and 30km piss me off. But the price was ok for me (700€) I don't want the refound offered and decided to keep it. The advantage of that euc are many, good looking design, useful handle and lift swich. Bright front light, back light blinks when brake. Very comfortable due his curved shapes and hi padded sides. Hi pedals position are damn good for off road. Impressive torque, good autonomy and content weight. Need to improve the pedals and trolley quality, those get loose or comes with it from fabric (trolley). The inmotion app is full of busg. The battery position on top rise the gravity center and makes really hard for boomerang or coin flip tricks. The body shell are quite slim, that not help to keep it straight in hi speed pushing with the legs. They haven't grip at all to pull it up in jumps, foots slide unless you put the extra pads who inmotion gives in for ankles protection. I think is really good for cross due his hi pass pedals and big torque. Not to heavy to do tricks, and enough hard to not break if you don't do it well (unless the trolley bar and the pedals). Sorry but I can't compare it against other in his league, I only have other cheap "oneWheel" Who can't be compared. I want to make an extensive review with my top range, hi slope climb, max turning inclination, better pedal angle and more. Please, make your questions and comments, would be nice gather a great data base for all euc together
  10. 12 points
    Since I began modifying my Gotway ACM 1600 and posting updates in another thread I realized there is a great deal crossover information that applies to all EUCs. I am currently working on installing new hall sensors in the ACM but thought many EUC members may not be entirely familiar with these tiny little sensors and the huge role they play in the design of our wheels. Here is a short video I put together that demonstrates some of the basic principals of hall sensors. Edit: At 3:21 I become dyslexic(north is off)
  11. 12 points
    A very quick electric unicycling practice session video from this morning showing some bar jumps and a Pennyspin (returning) Boomerang around a cone. Apologies for the poor quality of the footage - this was due to my slider rail malfunctioning. I have posted basic instructions in the "Tricks to Learn" thread. The bar jump is definitely not one to try on a Monster
  12. 12 points
    Here's a video from last weekend's group ride through Mesa and Tempe, Arizona. @dbfrese @Clovis @Playarider and @Ombre participated (along with my daughter for the first section). It's a long-ish video but I think you'll like it. We had a lot of laughs, fantastic weather, and beautiful scenery. A couple parts of the video show us riding the Valley Metro Light Rail to hop from downtown to downtown, and you can see how much sense EUCs make in that kind of situation.
  13. 11 points
    I've been absent from the board for almost two months ( been busy settling back into life in England), but I have been riding. I managed without a car for a month, relying on my wheel to travel. After that I needed to travel further, and public transport in England takes forever to get anywhere, and it's hellaciously expensive. Example Poole to London about 120 miles, £51. I have flown to Spain and back for less!!! anyway, I found myself in Bournmouth yesterday, and because I had my wheel with me,I went for a cruise along the magnificent beach. I'm not joking, having spent 5 months exploring the beaches of the Cote d'Azure, and Spain's Costa Blanca, and Costa Dorada, Bournmouth beach is just as awesome. so I'm cruising along, estimated 20kph, when I hit a small series of unseen bumps. I handled them fine, but my wheel (ks14c ) must not have liked the power surge required to stay in equilibrium, because I got ( yet another) violent pedal tilt back which threw me down the road, like a baseball batter sliding into home, face first. I hit the ground so hard, I couldn't keep my face Up, so my chin got a bump and scrape that drew blood. Today I have a scab about 2 cm square. i also hit the ground so hard that I bruised the pad of my left thumb and the tip of my left little finger was numb for about two hours. note I was wearing wrist, elbow, and knee pads. No injuries to those areas. Pads are good! additionally, both my shoulders hurt. Right now I move my arms like someone trying to learn how to control new prosthetic limbs, I.e very slowly, and I can't carry much weight. i also scuffed up my leather jacket. I was not wearing a helmet, but a typical bike or skate board helmet would not have protected my face ( I'm looking into this) This has been my worst, overall, and first real face plant ( face hits road) ever. And I was cruising along on level pavement at a sensible speed ( plus the bumps) why did it happen? well, I had been riding a while, and I didn't start the day with a 100% charge, so I was down around 53% power ( looked at app after the crash, not before). As I've said before, less than 60% on a small battery ( mine is 340wh) need to be handled conservatively. So why didn't I handle the trip conservatively? Well, actually I thought I did. Firstly, the LED readout on the ks range is wildly optimistic. It was lit up showing 60 to 80% with its woefully inadequate 5 bar range! But I knew that meant mat least 50%. Secondly, I was riding level, smooth pavement. Thirdly I was not pushing the speed, I was several miles into a mild 15 to 20 kph cruise. Fourthly, I was not showing off. this thing came completely out of the blue. Have I mentioned that I HATE the Kingsong violent tilt back? As I said, it wasn't the bumps that threw me down the road, it was Kingsong sudden and violent tilt back that threw me off. What's the point of an accident avoidance scheme that includes a violent accident as its modus operandi?
  14. 11 points
    True. It's one of the reasons why allowing people to try the Wheel is actually detrimental to sales. Typical initial impression by punters is 'how hard could it be?'—classic case is Richard Hammond on the Grand Tour/TG Christmas special—then their confidence takes a beating, feel disheartened & give up on the idea... For the serious Buyer, they do the research, know that there's going to be a bit of pain involved, but once they pay, they're are committed to making it work.
  15. 11 points
    Piggy-in-the-middle penny spin boomerangs & Self sustaining penny spins Two new tricks that I have filmed today, both of which are variations of the penny spin but this time I have deliberately made the wheel spin on an elliptical orbit. Under certain conditions, this sets off a self-sustaining spin. The Piggy-in-the-middle penny spin boomerang requires the wheel to complete at least one orbit around the rider before the rider remounts. The self-sustaining penny spin is just a less controlled version of the above - the wheel will continue to spin until it either hits something or the rider remounts!
  16. 11 points
    Rockwheel GT16 Unboxing + First Ride!
  17. 10 points
  18. 10 points
    I'm working on a one page safety infographic that will attempt to outline all the important information that is somewhat more helpful than the 'please exercise restraint' message—how is one supposed to know what restraint means, it's not very precise... One of the most important aspects of safety is an understanding that the Wheel's powers are finite; push beyond these, & you put your safety at peril. Hard acceleration is definitely at the top of this list & probably the culprit of most Wheel failures. The object of the illustration is to try to instill the relationship between the load & acceleration. The standard K = 1/2 mv2 F=ma formula makes certain assumptions which are not encountered in the Wheel world, like perfectly smooth acceleration & continuous power delivery. You'll probably want a decent safety margin over the rated power output & a formularized required power measurement, I think it's safe to say that the values here are pretty conservative.
  19. 10 points
    Long story short: I got tired of people asking me "what is that?" so I made business cards advertising this site. I hope you guys don't mind. If you want to print them out yourself, I've attached a Microsoft Office Publisher document that you could use to print these cards out on regular paper. Publication1.pub
  20. 10 points
    Got on the Noon News Today! Sort of... 😉
  21. 9 points
    Poor guy, I'm sending him out a set of replacement parts...
  22. 9 points
    Gotway Story time......
  23. 9 points
    Always remember that right of way is given, not taken. If you're a pedestrian, biker, or EUCer, if you get into a collision with a car, it doesn't matter who is at fault - YOU LOSE. So I follow these rules: Make sure you're highly visible, especially at night. I wear a flashing light band on my helmet, and a solid one across my back. I don't care if people think I look dorky - light me up like a Christmas tree! Always assume that a car doesn't see you. Even if you have the right of way, don't pull in front of a car until you make eye contact with the driver! Be careful on crosswalks. Many drivers will roll over the crosswalk - be sure that the driver sees you. Be careful of cars making right-hand turns - they are looking left. Drivers see what they are looking for. Usually, they are looking for other cars. Sometimes they look for pedestrians and bikes. They NEVER look for EUCs. On a crosswalk, people are traveling slowly - drivers expect that. They look a few feet left and right and think they are clear. They are NOT expecting an EUC flying across at 20mph. It's always better to be careful than to be a hood ornament (or worse).
  24. 9 points
    Before Luffy heads to rehab in the next few weeks I decided to give her a makeover with a colorful kid's theme. I vacuum formed a custom plastic shell over a plaster mold I initially made of Luffy. I used transfer paper to impregnate the plastic with a colorful handprints pattern. Luffy will undoubtedly sustain countless knocks and spills as therapists work with a select group of high functioning children. Increasing balance and somatosensory feedback will be the key elements behind the research project. I jump on Luffy today for a short ride after the modifications.
  25. 9 points
    There's a section of my commute in Miami, which runs along several 20+ story condo buildings. You can be riding along quite merrily, then be blasted by a downward gust reaching up to +40MPH. The Wheel's profile is unquestionably important. KS18 is the most challenging, to bleed some of the side wind, I occasionally have to adopt zigzag forward motion—to the bemusement of bystanders & dogs.
  26. 9 points
    Here's a few clips from my typical daily ride on the beach bike path through Hermosa Beach, King Harbor, and Redondo Beach in California. It's my first attempt at a video. Still trying to figure out the angles.
  27. 9 points
    Haven't owned a car in 5 years. KS18 is my mainstay for getting about, & for those rare occasions of being caught out in the rain, or too inebriated to ride (not all that rare!), UBER is like $2.
  28. 8 points
    You bet we'll do it again. Albeit better prepared. I'll pick up my end of the story where @Marty Backe left off, where I proceed to go look for some water for Marty. I get to the bottom of the canyon where the stream crosses the trail and realized the empty water bottle I had brought to collect water for Marty had fallen out of my pocket and was no where to be found. Plus the fact that the stream water didn't seem very drinkable.(I was thinking about the A&E show "Naked and Afraid",where the survivalists are always getting sick due to drinking contaminated water and getting violently ill.) So at this point I figured I would head on up this unknown path towards cell coverage to alert the authorities about @Marty Backe , since I knew @Ando Melkonyanwas headed back the way we came for the same reason, now I was doubling the odds of one of us making it to cell coverage for the sake of the parched Marty. As I proceeded up the trail, I had no idea about what I was up against. It was about another 15 miles of steep curvy constantly blocked mountain road ascending 4000 ft Until I found a paved road.I must have had to climb over 25 to 30 landslides on the way out. It seemed like I would clear one roadblock and be able to ride another 200 to 300 feet before I hit another. Lugging a 60 Lb. wheel over a rockslide on a steep incline gets real old real fast! But I kept on perserveering anyway, figuring I would run out of battery power or daylight and have to stay the night on the mountain,or make it out. When I finally got out of the canyon and found a paved road, it was Hwy 2, a mountain road I have previously ridden on motorcyle with no cell coverage. Not knowing where I was, I flagged down a passing car and they told me I was about 20 miles away from civilization (Glendale Ca.) and that if I headed west, I would reach it. Luckily for me, It was mostly downhill because my wheel app was showing 0% battery and I knew I needed the recharge that a downhill ride would provide.So now, all I had to do was survive a 20 mile ride down a 2 lane mountain road without getting hit by some of the speeding maniacs that frequent this highway. Plus I only had about an hour of daylight left. So off I went. I have ridden this road on a motorcycle many times and loved it, so now doing it on an EUC was a new twist! It was a blast and a feeling of "ZEN" came over me as I got closer and closer to civilization knowing what a man and his wheel can do in extreme situations.When I got about 5 miles from Glendale,I started to see emergency vehicles coming up the road and figured maybe they were responding to reports of a lost @Marty Backe.This would mean that @Ando Melkonyanhad made it to cell service already and Marty had help on the way.By the time I was just getting to the outskirts of town,an LASD car saw me and flagged me down and asked if I had been with another rider in the canyon.That is when I knew that they had been notified of the Missing Marty and My ordeal was over! They rode me over to the La Crescenta Sheriff's station(about a mile from where they picked me up) and I hung out and waited to hear if they had found Marty. In the meantime,I answered all the Deputies questions regarding EUC's.They were amazed that someone could travel so far on "one of those things".What they didn't realize is that "one of those things" was the "world famous ACM2040TM" with a 100+ mile range!
  29. 8 points
    I'm really grateful for these constructive comments. My decision is to buy the E+. Wearing my helmet plus wrist protectors I will give it a try. If it "works" for me, great. If not, I'll put it on the market and buy a Minipro or a donkey. ANSWERS S Calif, so no snow and smooth roads. I teach electrical engineering (though I'm obsolete) and entrepreneurship. Replacing solder-tabbed 18650 cells would be easy; encouraging because all such batteries begin with a limit to life. Again - THANKS!!
  30. 8 points
  31. 8 points
    Saving Marty and the Monster (part 2) So. After getting lost i almost started to believe that i myself might not make it out of the mountains in time, so i started praying. And it went a little like this.. "Jesus take the wheel".. " God please put me on the right track and help me get out of here. Please God i really dont want to spend the night camping with the bears. etc..." Sure enough.. my prayers got heard and after some time of carrying my 45lbs acm up the hills i finally saw a downhill route that looked like it was going in the right direction. So i hopped back on my dying wheel and started zooming dawn the hill. I knew that i had to get down quickly because i needed to get to the park rangers asap so the'll have enough daylight to go out and find Marty. After maybe an hour and a half of riding i finally came across the stupid dam that we were looking for the whole time! At this point my phone slowly started working again. I checked the maps and the park rangers station was not far away so i got back on the wheel and continued down the road until i got to the main gate where the rangers were supposed to be. Walked up to the door but unfortunately there was no one there. So i called 911. My call got transferred 3 times before someone in the right jurisdiction was able to send out some help. They asked me where i was and told me to stay there till the cops arrive. So i stayed put. Shortly after a whole gang of police cars and fire trucks and ambulances arrived at the gate. I made the 911 call at 5:45. From 6-9 i was with the cops explaining the situation, and answering all sorts of questions. Luckily i had a took a picture of Marty and Jeff from earlier that day so i gave that to the cops for description of our missing peeps. I had took a few more picture of the trail names and numbers on my way down. Those, along with a picture of Martys gps coordinates of his last known position gave the rescue team an idea of where he might be. The gps coordinates Marty had pulled up on his tracker turned out to be the nearest cellphone tower which was no good. So i had to somehow describe where my missing guy was to 6 different groups of teams (including; the police department, the fire fighers, the park rangers, the helicopter operator). They couldnt belive that we had made it all the way up the mountain and back down almost to the 2 frewway on "that thing!?!?" Anyways making the already long story short, being the "informant" i stayed with the rescue team leader answering more question and confirming new information they were getting until they tracked down our missing man. By the way the parking lot was 20 miles away from the point that i came down to on my wheel. Had a friend come pick me up and take me back to my car. End of the say i had probably done 50miles of mountain riding on my awesome ACM2.5 which saved mine and Martys life. 🙌🏼
  32. 8 points
    Los Angeles Country Sherriff's Dept. search and rescue plucked Marty out of the Angelus Nat'l. forrest.He is fine.I went out the opposite way past the stream another 16miles through dozens of landslides and 4500 ft. of elevation and came out on Hwy.2 and then rode that down another 21 miles and ended up in La Canada/flintwood before I got cell reception back.I would have never made it out if it were not for the "world famous ACM2040tm " and it's incredible 100 mile plus range. All is good! P.S. The L.A. County Sheriffs' Dept. search and rescue KICK ASS! Once they got Marty out, they even went back for his wheel.He left it behind and started walking out and thought That the Monster was going to be a $3000 loss.It would have been if not for the great people of the L.A.S.D. P.P.S. It was 2 ACM's and one Monster on the outing today and the Monster sucks at hill climbing compared to ACMs.Case closed.
  33. 8 points
    I had a bunch of clips of friends and I juggling and EUCing over the past 6 months, decided to compile them into a video. Mostly juggling, but a few good clips of EUC riding and EUC/juggling tricks thrown in there:
  34. 8 points
    Pain is normal in the beginning. You are right. With the wheel straight up and down, the pressure on your calve will be unbearable. So you must lean the wheel at an angle to relieve that unbearable pressure. For example, if you are placing your right foot on the wheel, and your left foot on the ground, then you need to tilt the wheel to the left. Your right foot is on the foot stand, and the wheel is tilted to the left along your calf. As you mount, you will return the wheel to straight up and down position. I use something - like my car, or a wall - to assist the mount, especially in the beginning. So for this example, place your left hand on a support, while tipping the wheel to the left. With your right foot on the stand, use your left support to help you get your left foot on the left pedal (while returning the wheel to upright). From there you can decide to try to ride off, or in the beginning, you can work your way along the car (or wall) to feel what that feels like. Good luck. Took me forever, so any buyer's remorse you may be feeling should be temporary. The fun is yet to come.
  35. 8 points
    OP welcome to the face plant club. Membership is free but the hazing is hell. I have little to add. Others have told you what went wrong. NO WAIT! I do have something to add. For you newbies, you can't treat an euc battery like a gas tank in a car. It won't provide the full power all the way to the last drop. You can cane a tiny car with 6 of your closest friends, up a hill, with your right foot buried in the shag pile carpet, and it will either make it or it wont, but no one will fall out and roll down the road. Ask too much of a half full euc battery and once it hits " no reserve left" you better start flapping, I know I do. So,it's official, not enough battery, too much speed, too much hill, accelerating as well, a heavy rider and loads of spectators, place all ingredients in a bowl, stir vigorously, et voila, face plant brownies. I've eaten quite a few, following this exact recipe, and a few variations to boot,. Still makes the same delicious, gravel filled brownies. i won't ride my 14c close to 15mph, because it tried to throw me off once around 16 mph, WITH a full battery. If I want to go 15mph, I'll pony up for a wheel that will comfortably do 25mph (40 kph). I keep it around 12mph (20kph) and slower on hills. I know other like Marty say it will do 20 mph, but I'm pain averse, and don't want to go where I know pain is lurking.
  36. 8 points
    That pack is labelled 132Wh: if there's another one on the other side, that brings the total up to a paltry 264Wh (32 cells)! Come on GW this isn't 2014: 48-64 should be the absolute minimum we'd expect from you. Large packs are one of the main reasons why you have such large fan-base, including this belated member to the club Whatever manufacturer makes a decent 800W, 30kph, >500Wh, sub-12kg class Wheel is going to do very well over the summer sales season. V5F/+ deserves a power/speed uprate; 14D is good, but battery not large enough, attention to detail could be better (like self standing properties) & KS need to do better on the truly terrible App; MCM4 meets performance requirements, but not exactly a beauty & lack of retractable handle is a non-starter for many buyers.
  37. 8 points
    So my Monster took a bit of a beating this weekend. I had a goal to make it to a radio tower at the top of a mountain behind my place. This is a 400m meter climb over some questionable roads but I had it in mind that we would do it (that is me and the Monster). I had tried to get there last weekend but ran into to much snow so ended up turning around. When I returned I found my rear lights no longer worked. As I didn't have time and the Monster was still functional I left it. So this weekend I took the Monster for another assault at the hill. This time success. 10km and 400m very few tumbles for both of us and 28 minutes to success. It was a nice sunny day so I figured I would I tackle the next level take the mountain bike trails back. I wish I had filmed it as it was a series of tumbles and nail bitting down hills. At times I was leaning so far back to slow down that my heals were hitting the ground behind me. I managed to run an couple of freshets and cross a few swamps. Both my self and the Monster were covered in mud and I am not sure what else by the time we hit the bottom an hour and a half later. So I went to shut the EUC down for a well deserved rest and scrub down but it didn't want to shut off. I didn't matter how many times I pushed the power button the Monster had turned into the energizer bunny and it just kept on going. Eventually I just lifted it up and let it free wheel until it auto shut off. So then it was time to dissect and investigate. It turns out that water is able to enter the Monster from many cracks and crevices. I am sure that that was the cause of the shut off issue as I found droplets of water throughout the inside of unit. I have since dried everything, reassembled and taped off all seams. Rear lights still don't work (dealer is working on that with me) but I was very happy with the assembly of my unit (Dec 22 2016 run). All cables and connections were tight and no indication of overheating. One cable had been pinched but this was an easy fix. Anyway some of the pictures are below for those that may be interested:
  38. 8 points
    "Crossover" Returning Boomerang Just a bit of electric unicycling fun from this morning's practice session - an extension of the "returning boomerang" - where the rider takes the opposite path to the wheel with both the wheel and the rider returning to the start point at the same time. This tick could potentially be jazzed up by tumbling (somersaulting) around the circle, or perhaps performing it around something more interesting than a set of cones!
  39. 8 points
    It's a wrap. After 17 days total I'm pretty confident with my backward riding skills. Reversals are mostly successful and in general everything is much smoother. Here's a demonstration of my current skill level along with some parting words.
  40. 8 points
  41. 8 points
    A quick film from Bromley Skatepark in South London. I'm a bit rusty at present as I haven't had a lot of time to practice. Skatelite surface = Super fast penny spins
  42. 8 points
    It drives me crazy that every time KS makes an improvement to the pedal design, it's physically incompatible with the previous pedal support arm. Examining the original KS 14/18 grooved pedals, the follow on KS16 design with rubber surface & the latest grippy type, there's a different bracket shape which seems completely arbitrary. Could be wrong, but how hard can it be to make the slots align up from one type to the next.... Morning vent completed!
  43. 8 points
    My 9 month old Son's first "ride", under very controlled conditions - one of us is enjoying ourselves, the other appears rather indifferent to the experience The buggy actually steers very well.
  44. 7 points
    Don't buy a Monster and then fret about 'subtlety.' That ship has already sailed.
  45. 7 points
    I, like you, have knee problems. I have torn Meniscus in both knees. If I ride distances, I need to wear knee braces or it actually makes my knees hurt worse. I, also like you, rode a pedal unicycle when I was 13 years old but have not been on one since. I took my first EUC to Sam's Club and held onto a shopping cart rack in the parking lot after they closed and rode around it one time. By the time I got back to the beginning, I had it and took off. I rode about 600 ft that night. The next day I took to a local bike path of about 5 miles in length. I rode the whole distance without stopping one time because I did not know how to stop!!! OOPS! I took the whole ride back practicing starting and stopping because I quickly realized it was super important around people and eventually cars. After 3 days of riding my generic wheel, I went and bought a NineBot E+ and LOVED it! It's a very capable wheel. Your price is very good! I've now moved up to a GotWay MSuper and love it even more. Others have answered the other questions well, so I'll avoid those. But I will say that I also own a NineBot Mini Pro, and I think it is MUCH better suited for what you want to do. The amount of control on the Mini Pro is a lot easier to use. You can stop and start without fear of falling off, and around walking traffic, it's a breeze. The Mini Pro is NOTHING like the Hover Boards, and I've owned a few of those too, so I know. The Mini Pro traverses obstacles very well. It can go up and down wheel chair ramps easily, across grass and gravel, and even go over bumps quite well, something the hoverboards can NOT do well. I've even taken my Mini Pro off road and it does well there too since it has a computer that helps keep it straight and level when riding over bumps and angles. The NineBot E+ is also able to do all these things, but it has a much larger learning curve and even when you are very good, you still fall off occasionally. Running around foot traffic on the NineBot E+ is very possible, but not until you are comfortable riding 1 mph or less, and that can take some time. The other thing is that a Campus is likely to be more willing to allow you to cruise around on the Mini Pro over the E+. Especially while you are learning. While learning, many people have quite a few falls and mishaps, and it is perceived as being more dangerous because it simply looks that way. The Mini Pro is super easy to learn, 5 mins tops, and it's SUPER stable. Good luck in whatever you get. Either way, I hope you take up EUC also. It is probably better suited for off campus riding though, which you will LOVE!!! Off Campus, it runs circles around the Mini Pro. On the Mini Pro, I've gone 15 miles on a charge at around 10-12 mph, so it's still capable, but the E+ can do it so much easier when you know how to ride it.
  46. 7 points
    Starting with the how to do it in general, to put it relatively shortly and without too much explanation: A little bit of background: P = U * I (Power equals voltage times current), units: W = V * A (Watts equals volts times amperes) Multiply both sides of the equation with hour to get "charge" or "capacity" or "energy content" or whatever the correct term is (technically, "electric charge" is typically measured in coulombs, or ampere seconds, and watthours is something like "derived unit of energy", but I'll just skip minor details here ), basically you want to end up with watthours: P * t = U * I * t (Power times time equals voltage times current times time), using hours for the time in units, Wh = V * Ah (Watthours equals voltage times amperehours). Commonly "amperes" (the unit of current) is shortened to "amps" and amperehours (the amount of charge) is shortened to "amphours". For the wheel battery capacity calculations, typically the nominal voltage (I've seen both 3.6V and 3.7V used for lithium cells, don't know if there's some "standard" -value, 3.7V seems to be mostly quoted) is used for the voltage, but at least for the 16S / 67.2V (maximum voltage) -wheels, the manufacturers seem to usually round the nominal voltage to a round 60V, while the real value would be 57.6V (16 * 3.6V) or 59.2V (16 * 3.7V). The amount of amphours comes from the cell capacities. Although there are many cells with different capacities, which are usually reported in milliamphours or mAh, the most common capacities seem to be 2200mAh (2.2Ah), 2900mAh (2.9Ah), 3200mAh (3.2Ah) and 3500mAh (3.5Ah). When cells are put in series, the voltage goes up, but the capacity does not increase. When cells are put in parallel, the voltage does not raise, but the capacity increases: To get to the capacity in watthours for a single pack, you use the above equation to calculate: Wh = V * Ah --> Wh = Nominal voltage of the cells in series times single cell capacity Then, you multiply that Wh amount by the number of similar packs (as usually all the packs are similar in the wheel) in parallel to get the total capacity A simple example using the rounded 60V nominal voltage for 16S-pack, using the common cell capacities (2.2Ah, 2.9Ah, 3.2Ah, 3.5Ah) 60V * 2.2Ah = 132Wh per pack 60V * 2.9Ah = 174Wh per pack 60V * 3.2Ah = 192Wh per pack 60V * 3.5Ah = 210Wh per pack Sound familiar? Many wheels use these pack sizes, or multiples of them (for multiple packs in parallel), for example 16S4P with 3.5Ah cells: 60V * 3.5Ah * 4 = 840Wh. Due to the rounding to 60V, the 132Wh packs aren't really 132Wh, but around 59.2V * 2.2Ah = 130,24Wh or 57.6V * 2.2Ah = 126,72Wh (and same goes for all the 16S packs atleast). That's also why 1RadWerkstatt says that the real capacity of the 840Wh KS16 is actually 828Wh (using 3.7V per cell: 59.2V * 3.5Ah * 4 packs = 828,8Wh). Now, to work backwards to get the cell capacity from the 1845Wh number, based on what we know (I'm assuming that's what you wanted to calculate, as you already know the amount of cells in series, and thus voltage, the total capacity and the amount of parallel packs): - There's 24 cells in series per pack, giving a nominal voltage of (using 3.7V per cell): 24 * 3.7V = 88.8V, although they might use a rounded value again, like 90V - The total battery capacity of 6 packs is 1845Wh First, calculate the watthours per pack: 1845Wh / 6 packs = 307.5Wh per pack Rearranging the equation (with units) of the capacity: Wh = V * Ah (divide both sides by V) <=> Ah = Wh / V So the cell capacity should be around: 307.5Wh / 88.8V = 3,4628...Ah So, it should be 24S6P with 3.5Ah (closest "match" in the common cell capacities) cells. Typically the numbers reported by the manufacturers / resellers are at least somewhat rounded, one way or the other, so you might not "hit" an even number. The slight error between 3.46..Ah and 3.5Ah is probably due to roundings used in the original 1845Wh capacity-value and/or nominal voltages, or the actual pack configuration is something else, like 24S7P or 24S8P with smaller capacity cells, for example.
  47. 7 points
    Interestingly, given that Luffy is a featherweight and has a low pedal height it may play an adjunct role in treating children with specific disabilities. Kids with cerebral palsy, low muscle tone, balance and somotosensory feedback issues may benefit. I ordered a Luffy from Ian for this purpose and with the assistance of colleagues we should be able to obtain some interesting quantifiable data over the coming months.
  48. 7 points
    NYC group ride tonight, with special guests the Boosted Board & Evolve Carbon GT!
  49. 7 points
    Yeah! This looks very clean!!! Really got no clue how they forgot all that heat insulation on MeepMeep's wheel! Also the silicon drops now are done with some kind of sense...Not like a 3year old playing with a silicon tube anymore! so there is hope :-)
  50. 7 points
    Here is another video I found from my Oct'16 trip to Shenzhen.I'm "rolling the dog" around Bao'an stadium and gymnasium.