Chris Westland

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Chris Westland last won the day on January 14

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About Chris Westland

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  1. 750KW ... emphasizes how difficult it is to counter gravity! Surely 750KW would appease even the most demanding of Gotway owners. But you'd have to gut a Tesla S just to get the battery pack ...
  2. Ditto ... definitely Ditto ... see my theories at http://forum.electricunicycle.org/topic/7062-trail-geometry-and-the-wobbles/#elTopicActions_menu I've had lots of problems with the stock V8 app. I now only use it at home when the V8 is in its stand to change the speed, and alter the light design (and I don't do this any more since my speed is maxed out and I don't really care about the lights). The original app has serious problems connecting, and is really only useful for networking (in Mandarin if you are so inclined) I've switched over to Darkness Bot which is completely reliable, information rich and the best app for V8's and other wheels http://forum.electricunicycle.org/topic/6578-darknessbot-ios-app/?page=4#comment-92149
  3. I know from the movies that aliens always land at Griffith Park ...
  4. You can read his description in the patent, but note that even Carles Gabrial's patent references earlier patents ... Cited Patent Filing date Publication date Applicant Title US627596 * Jan 20, 1898 Jun 27, 1899 Louis Schutte Monocycle. US3224785 * Jul 22, 1963 Dec 21, 1965 Stevenson Gerald W Rider stabilized roller skate provided with brake means actuated by tilting of the brake US3306626 * Jul 9, 1965 Feb 28, 1967 Kawada Tadao Occupant-propelled plaything having a single wheel US3399742 * Jun 23, 1966 Sep 3, 1968 Franklin S. Malick Powered unicycle DE920950C * May 3, 1953 Dec 2, 1954 Hans Still Ag Triebwerk fuer Kraftkarren
  5. @Scatcat makes good points. I have a size 11 foot (big for my height) and I hang 10 over the front of the pedal. It took me a while to figure this out, but the only thing that matters (IMO for foot position) is your body axis aligns with the wheel axis ... that way you are not fighting the wheel. For me that means my toes hang off the front of the pedal. +1 on suggesting that larger pedals should be an option. Of course everyone is different, and you really have to experiment to see what works for you.
  6. Simon Tay's videos are great. He seems to be the main guy videoing about EUC technique and kinematics, and he is spot on in in suggestions. Wear hard bottom shoes (as @Carlos E Rodriguez suggested) and position the weight of body over a point on the foot that aligns with the hip and upper body (I prefer standard running shoes). Alternately lift toes off the pedals, and take a rest when needed. Alignment is extremely important, as otherwise (IMHO) you will be fighting the wheel. I started a thread on my theories (which may or may not be correct, but ...I welcome discussion) at: ... so perhaps you can experiment, and let us know what you think. I would like to see more discussion on the forum about technique and theories of pedagogy for EUCs as there is not yet a definitive "Unicycle University" for ECUs, say along the lines of http://www.motorcycletraining.com/ or http://droneschool.com/ (but there should be)
  7. I think foot pain is a fact of life as you get older, and the fact that your only inputs to an EUC are from the bottoms of your feet (with an occasional assist from the calf) will only add to the pain. One solution (and a good one) is to get fitted for custom orthotics, as these will assure that your arches take the correct shape. You can either go to a podiatrist (~$200-300) or there are "sandbox" type fitting systems (~$100) or off-the-shelf inserts (~$50). Generally, IMO you get what you pay for. Also check to see that your shoes are not crowding toes, etc as these will create foot pain and damage.
  8. This is a great idea @RooMiniPro. RC LiPos and a buck-boost converter. You could conceivably carry 10+Ah in a backpack, and quick charge whenever you got low. One problem is finding the converters for 84v EUCs, as these are a bit rare (but I think you can find them on eBay ... I'll have to look). Perhaps 2 x 42v in series (if that is possible). I think I'd read somewhere on the forum that manufacturers were limited to 60v on a rail.
  9. I didn't think about this as I am 5'7" and about 150 lbs (perhaps a product of spending 1/4 of my year eating Chinese food) which puts me in the range of Chinese engineers. In that regard, I think the Zero would be problematic for a 6'+ & 200+lbs rider as torque may be insufficient to stabilize such riders reliably. All the more reason for IPS, with its innovative designs and high quality, to come up with an ACM challenger. I think maybe their model could be the Inmotion V5/V8 which are light and relatively powerful.
  10. IPS is going for the slim, light end of the market, with the idea that EUC's could be a real urban commuter. It puts the i5 in the same category as the Zero ...< 7.5kg (vs. Zeros 10.3kg), slim, 14", 20kph. Owning a Zero, I am enthused about the potential for short commutes on even ground; paved bicycle trails work well, and top speed is adequate for commutes. The Zero's motor is rated at 1000W, but performs more like 500W, so I think they may be quoting a peak power rating. There are two reasons (IMHO) that the larger wheels tend to be popular: (1) stability on rough, unpaved ground; and (2) 30+kph speeds which becomes your baseline once you've gotten into EUCs. The IPS controllers are well designed, and it would be great if their engineers could scale up this light, slim technology into something to compete with the Gotway ACM.
  11. We are living in Xi'an, Shaanxi Province China this summer. Here's a picture of a local Xi'aner with is Inmotion V5 which he uses to tour around the city
  12. Another option as well ...
  13. The Gotway ACM wheel has caught my attention. I love my V8; in many respects it is the perfect wheel for me in Chicago, since our "trails" are all paved bike paths, and we have 100s of miles of them. The ACM is also 16" and I would be comfortable with that, but a lot heavier. I'm hoping it would have the advantages of the V8 along with twice the torque and more weight to stabilize it on gravel and roots. I've not ridden the 22" appropriately named "Monster" so have no idea how much smoother the big 70lbs wheel would be. The V8 still trumps everything else as being the most well thought out. The wheel cutoff button in the handle is brilliant and useful, and the trolley handle, which I pull out whenever I dismount, is useful as well. I would have a hard time switching without those two features in a new wheel. Maybe the "ideal" would be @jrkline's 2400Wh battery on an Inmotion V8 (wouldn't that be a thought).
  14. Indeed, at 150 lbs, I'm more in the range of Chinese engineers who design EUCs. I'm curious Marty, as you suggested that the 16" ACM might be your favorite choice for trails. Having tried a V8 on trails, I can see why big and heavy is preferred. Any thoughts?
  15. I wonder if there are natural parameters that one could say set the "sweet spot" for an EUC. I personally would favor the smallest wheel that would feel "stable" in a particular use (e.g., off-road) because (1) small = torque and this provides more control, and (2) power and speed increase linearly with EUC scale; surface durability by the square; weight and wind pressure by the cube (and we aren't streamlined as we are on a bike). Going big demands tougher (more expensive) materials and electronics, as well as bigger batteries. Just my thoughts.