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About rcgldr

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  • Birthday 12/10/1951

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  • Location
    Laguna Hills, CA (United States)
  • EUC
    Inmotion V8F

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  1. Thanks for the info. At the locations I ride at, there aren't many spots where I could go much faster than 15 mph, other than for a short burst of speed. I have tested tilt back at 25 kph <=> 15.5 mph, with an indicated 16 mph, without issue on a 2000+ foot long and wide pathway. (I had previously tested tilt back at 15 kph and 20 kph). There have been a few posts about new riders getting speed wobble when first going around 20 mph, which I want to avoid. Still it's nice to know that I could increase to 20 mph when I find a suitable location and feel comfortable with trying it out with s
  2. I live in near a senior community in Orange County, California, and don't feel comfortable riding in the streets. Most of my recent riding is on a bike trail, with only a few pedestrians, bikes, ... . There are a lot of cuves, inclines, and declines to make the ride intersting. My main concern is the occasional rabbit running across the trail, so I leave my V8F max speed at 15.5 mph, with most of my riding between 10 mph to 14 mph, slowing to 8 mph for inclines or declines. I'm only doing 20 to 30 minute rides, so range isn't an issue. I'll probably increase the max speed to 18 mph or so, sinc
  3. This is getting off topic, but as noted in the video, they are the same if the gravitational field is uniform (a flat earth), and the gravitational field near the surface of the earth is close enough to uniform that this isn't an issue. It does become an issue for objects in orbit. An example of this is the moon, which isn't perfectly spherical in it's mass distribution, and is why mostly one side of the moon faces the earth while it orbits the earth (there is a small oscillation). Similarly, a very long rod in orbit will tend to be oriented "vertically" or oscillate about a "vertical" orienta
  4. For the vertical center, it's near the top of the hips. Take at look at aerial hoop act videos, with arms extended outwards, they are balanced when lying on their back just above the hips. Gravity always effectively acts on the center of mass, so essentially they are the same. EUC's will exert a forwards torque on the tire coexistent with a backwards torque on the frame in response to a forwards tilt input from the rider or when the EUC detects the center of mass is in front of the contact patch via the torque sensors in the motor (to regain balance). EUC's will exert a ba
  5. If an EUC is not moving, then the center of mass needs to be directly over the axle. If the frame | pedal tilt is zero, then the center of mass is directly over the center of the pedals. If the frame | pedal tilt is forwards, the pedals are offset backwards, center of mass will be forwards of center of pedals, and the rider would have to compensate, and vice versa for frame | pedal tilt backwards. For foot position, the center of mass is going to be somewhere between the center of the ball and center of the heel of the rider's feet. Foot position and pedal tilt will determine exactly wher
  6. Thanks for the clarification. For my feet, foot position with back of heel and front of toe equal distant is only about 1/4 inch back from center of heel and center of ball equal distant, not much difference, about the same as having 1 degree of tilt forward on the pedals (which shifts the pedals about 1/4 inch backwards). I'm thinking that either method (centered shoes or centered ball and heel) is going to end up with about the same foot position (within 1/4 inch), assuming that shoe offset is near equal (unlike my tennis shoes with the big heels). There's a confusing youtube video wit
  7. As for expert, from what I can see in videos, Chooch Tech has his feet centered (toe and heel equal distant), but he rides backwards at fairly high speed (there's a video of him commuting all the way home backwards), and most of the time, he uses power pads. I don't know if Kuji Rolls is considered an expert, but he states to have feet centered in his how to ride EUC video of an actual beginner. In the EUCO video, the (unnamed?) rider notes that he has his feet a bit forwards, but still recommends beginners start with their feet centered (toe to heel). He does a few tricks in that and other vi
  8. True, but the OP is asking for a starting point, a recommended initial foot position for a beginner that has never ridden before, as opposed to adjusting foot position based on experience. The OP's question was about inwards | outwards placement, and the most common advice is that beginners should start with the inside of the riders ankles close to or touching the shell, and using ankle pads and|or high top shoes. Although not asked for, this thread evolved into including recommended initial forwards | backwards foot position for a beginner that has never ridden before. I've already posted abo
  9. The confusing part for me is that the beginner videos made by EUCO, Kuji Rolls, and Wrong Way state to have the feet centered on pedals, and looking at the foot placement in those videos, they mean toe and heel equal distant from pedal edges. Others state ball and heel equal distant from pedal edges. As for me, toe and heel equal distant is stable, while ball and heel equal distant is wobbly. I don't know what the experience of other beginner riders has been other than what I've seen in videos.
  10. Somehow I lost an edit. Could you clarify what you mean by too far back? Would you consider feet centered so that toes and heels are equal distance from pedal edges too far back, or would too far back be a bit back from centered?
  11. My main issue is conflicting input from experts. Most of what I assume are experts in the how to ride EUC videos, and the guy who helped me on my first session, state to center your feet on the pedals (this would be mean compensating for offset shoes), at least as a starting point for foot position, and noting that everyone is a little different and may adjust a little bit to what feels comfortable for them. Some experts state to have your feet a bit forwards of centered. In one of the how to videos, the guy notes he has his feet a bit forwards (less than 1/2 inch forward from centered from w
  12. The tennis shoes I wear extend 1/2 inch in front of the toes, 1 1/2 inch behind the heels, so I have to place shoes 1/2 inch back for toes and heels to be "centered". When standing on solid ground, COG will be in front of the ankle pivot point, with the shins angled forwards slightly and the knees bent slightly, with the COG somewhere between heels and balls of the feet, but I'm not sure if it is exactly between the ball and heel of the feet. There might be some tendency to have COG a bit in front of the mid-point, since a person can lean forwards more than they can lean backwards without
  13. A persons feet would have to be quite a bit back to have that much of their weight on their toes. Based on recommendations I saw in "how to ride" videos, I have my shoes centered on the pedals, or toes and heels equal distance from pedal edges. As posted earlier, I don't lean forwards, and instead just angle the lower legs more forwards to shift the knees and everything above the knees a bit forwards. I don't have any sensation of a lot of weight on my toes. In my case, my quads get fatigued before my calf muscles do. I don't know how other riders muscles fatigue over time.
  14. This is explained in the thread that mrelwood linked to, but here is a summary. For normal speeds, tilt steering is the most common. You tilt the EUC with your feet and legs, and it will steer in the direction of tilt due to camber effect. The rider in this video is almost motionless (no body twisting or arm flailing) other than leaning and tilting the EUC. Due to the light rider, speed, turning radius, ... , the rider is leaning more than the EUC is tilted most of the time: https://www.youtube.com/watch?v=-hWMwK3Cfs0 For very low speeds yaw steering is used (the EUC doesn't ha
  15. The coin example is different than what happens on an EUC. There's no rider on the coin, and the coin is never in a coordinated turn, the inwards torque due to gravity pulling down at the center of mass of the coin and the floor pushing up at the contact point, is not completely countered by the outwards torque from the outwards centrifugal reaction force at the center of mass and the inwards centripetal force at the contact point, so there is always a net inwards torque. The coin responds to this net inwards torque with a 90 degree delay into a steering reaction due to precession, steering it
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