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Sidewalk Enforcer

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  1. This may sound like blasphemy to many here but I think this is the best advice for uneven terrain. The jolts transferred up your back can seem minor in isolation but the accumulated effect over many miles and many days can lead to problems. That's not to say that it's not fun to romp along at pace from time to time, sometimes I just wanna get out there and "chase the dragon" (oi quiet in cheap seats at the back - I can hear your snickering about my V8 not actually being fast ). I too injured my back when taking up the EUC. I'm new and enthusiastic and had had rather limited physical activity in the year or two prior to riding - so also relatively unfit. The miles were piled upon the new wheel with wonderment and abandon, hundreds of miles each month, and then the back problem struck. I am still a little sore from time to time and I am far more reserved now when I ride. Lumps and bumps in the path are approached cautiously, and slowly. In time my hope is that my fitness may improve and my body adapts to this strange sport, for now it's too early to tell. Also brace yourself when picking up the wheel if you need clear stairs or kerbs - you wouldn't swing a television set from one arm with no regard for your back.
  2. I'll take the pessimistic approach that it's not technically possible. A wheel capable of that speed cannot exist in the EUC form-factor we've become accustomed to. The analogy with an electric motorcycle is not entirely accurate as that vehicle does not need reserve torque to sustain the upright vehicle and rider. Whether such a vehicle could be operated safely on public roads? I'll go with a solid no. Closed circuit racing with sufficient training and practice ... maybe. http://lancet.mit.edu/motors/motors3.html The page above describes the torque-speed characteristic of a constant voltage DC electric motor. Notice that maximum torque is produced at 0 rpm (when the wheel is stationary). As speed increases, electro-magnetic resistances build and build within the motor until there is no longer any more power in the wheel and you arrive at 0 torque. The maximum power for a DC electric motor develops at 50% max motor velocity, there-after your're heading towards face-plant city if you're riding a self-balancing vehicle. So if one were to design an EUC that could safely sustain a self-balancing profile @ 100 mph, you would need to design a wheel motor that has a max velocity of 200 mph!!!! Even if you had an imaginary power source that could deliver enough power to the motor by increasing the amount of voltage available, the current draw would require massively larger gauge wires. Larger wire gauge means less windings for the rotors. Less windings means lower efficiency. So maybe you increase the size of the motor to increase the space between the rotors and achieve the same number of windings - but now you have more mass, an impractically large wheel and need even more power to drive the motor. Then we need to consider the material science and the forces at play at those types of speeds. For example, a 16 in wheel operating at 100 mph is experiencing ~ 28 revolutions per second and ~ 800 G in centrifugal forces. I doubt the bicycle tire that could handle those types of loads would make for a very comfortable ride!
  3. Whoa , that'll definitely prevent accidental shutdown. A massive PITA when I started learning - you step on with your control foot in preparation to push off, grab the handle to stabilise the wheel and accidentally activate the power button, turning the silly thing off. Doh! I opted for a small strip of rubber above the button for some tactile information when I'm grabbing the handle - but yours looks cool. Not sure it'll survive a roll-over crash.
  4. I've just noticed that Bike Barn (a major nation-wide cycling brick & mortar retailer in NZ) is now stocking the mighty Z10! The price is making my eyes water though @ $3600! https://www.bikebarn.co.nz/scooters/electric-scooters Curious that they don't have some of the Ninebot starter wheels on offer, but exciting times ... I guess the PEV revolution is making some significant head-winds against their traditional pedal-powered fare.
  5. Stumbled across this vid - haven't seen it posted elsewhere on this forum. Fair warning it's in French with English sub-titles but I thought it was presented very fairly.
  6. Oooo ... nose and sinuses are your brain's crumple zone for brain protection? Never thought about it that way - nice vid, and good choice!
  7. Arrrg, makes my blood boil. Much as regulations irritate, the absence of clear standing for PEVs needs to be fixed. At least you didn't get the tow truck treatment @Jean Dublin! Obviously that cop's just doing his job as a traffic warden but it feels so unnecessary! Sorry to go off-topic, but what's this "GDPR, GDPR ... GDPR"? Some sort of Jedi mind trick? Seems like a perversion of the intent of the GDPR directive if you ask me. Surely it doesn't forbid recording encounters with plod for your own protection?
  8. A lack a empathy was not what I was going for, sorry if that's how it came across. I think, in my bleary-eyed Sunday morning state, it was the hyperbole irked me. My personal advocacy position is that EUCs should be at parity with cyclists under the law, but all these countries seem to be pursuing them as "foreign" and "other" and "think of the children" etc. Legislation invariably informed by/ influenced by people who have had no exposure to these wonderful creations - PEVs.
  9. Not sure I understand the angst. Is a 20km/h cap really the end of EUCs? Sure it seems a bit daft to cap some vehicles in shared paths and not others - it would be safer if all vehicles on a shared path travelled at similar speeds. From my experience I rarely exceed 20, my average is more like 12km/h on a typical commute. Cyclists regularly go cruising past me (them on the road, me on the footpaths). Here in NZ the transport authority is mulling over a 10km/h cap! To clarify, yes I agree that the legislation is poorly drafted, but I don't understand how that correlates with the end of EUCs in Denmark.
  10. I like how both vids posted above show that the handlebar is completely unnecessary. Their website claims "rethink the electric unicycle" ... I don't think so Jim.
  11. Caution is required. What started out as a stiffness in the neck region, quickly developed into a pinched nerve in the upper back for me. I've not yet returned to the wheel - this forced down time makes me to reconsider how I ride. My initial assessment for the back problem was improper lifting technique, but riding posture no doubt is also a contributor. My commute takes me through an industrial estate with deep cutouts (15 - 20cm) in the sidewalk paths for driveway entrance access to various businesses. Presumably these entrances have been built this way to better accommodate trucks. However, traversal on the EUC is challenging. On the contoured down-dip the transitions can be steep enough to momentarily activate the overspeed alarm, while on the up-exit the transitions can lift your feet clean off the pedals. I've attempted to compensate by riding in a sort of skiing stance to better absorb the bumps but this may stress the back more as it is not a natural posture. The impact to my ankles and knees has not been pleasant either. In time with further conditioning, I expect my body will adapt.
  12. Thank you both for your insight, you've given this more thought than I did. I have a torch - so I'll use that unless it proves to be too fiddly to hold something in my hand all the time. It doesn't cost anything to try.
  13. Loved that Sparta cartoon in the video! Keep doing what you do @Hsiang. Thoroughly enjoy your long-form discussion vlogs.
  14. Looks like a good solution, very bright. For me, I have a different problem to solve. The V8 can put on its own light show. Rather than being seen, it is how to see after dark. Yes the V8 has a small headlight but the beam throw is quite feeble, so once again its function is more about being seen rather than seeing. Now that daylight savings has kicked in, the sun has already set at the end of the work day. I'm leaning toward some sort of headlamp arrangement that's compatible with a helmet but there are an awful array of trashy looking camping-gear tier head lamps in online stores claiming to push out XXXXXXXXXX!!!! Lumens of light that I suspect: burn through their battery reserves in no time and blind oncoming traffic with poor lighting directional control. The price range on these headlamps also varies alarmingly from ~ $8.00 - $900.00! Anyone have any recommendations? I've seen "The Panda" dude riding his Monster wheel on those youtube videos, but that lighting arrangement is a little excessive for me.
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