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#1
June 1st 05, 01:59 PM
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Resistance and freewheeling...
I have a gut feeling hypothesis as follows:
When attempting tricks involving freewheeling, it is easier to perform them if there is resistance to the turning of the wheel. This includes BC wheeling and coasting. I can see that a wheel with high resistance in the bearings will slow down quicker, but will it also allow the rider to be less precise in their fore-aft balance? When I think about extreme cases of high and low rolling resistance, it feels that my hypothesis is right, but how much effect would normal levels of differing resistance have? I've always ridden (freestyle) with very high tyre pressure, making rolling and turns easier. However, if I lowered my tyre pressure, would this introduce rolling resistance and make my coasting attempts more successful? Could you get or make especially resistant bearings (ie. smooth but resistant) for learning these skills, then go up to more free-running ones once the basic skill has been acquired? These are all thoughts of the top of my head. I don't know if anyone has ever actually done any research on the matter. Discuss... Stu -- :wq 
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#2
June 1st 05, 07:26 PM
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Stu Carter wrote: *Could you get or make especially resistant bearings (ie. smooth but resistant) for learning these skills, then go up to more free-running ones once the basic skill has been acquired?* This is an interesting concept but I believe all one needs to do is select an appropriate grade on which to practice, rather than go through the trouble of replacing their bearings. A slight uphill would have the same effect as using "stunted" bearings on flat ground. As to making the resistant bearings, I found salt water corrosion does a good number on my skateboard wheel bearings...  Stu Carter wrote: *:wq* Did I read that right? Are you using VI to edit your postings? Helloooo uber-geek!  If that's truly the case then I can no longercall myself a geek. It looks like, yet again, the bar has been raised. -- maestro8 - Mad Scientists for World Domination Those are my principles. If you don't like those, I have others. -- Groucho Marx ------------------------------------------------------------------------ maestro8's Profile: http://www.unicyclist.com/profile/7871 View this thread: http://www.unicyclist.com/thread/40865
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#3
June 1st 05, 10:19 PM
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On Wed, 1 Jun 2005, maestro8 wrote:
Stu Carter wrote: This is an interesting concept but I believe all one needs to do is select an appropriate grade on which to practice, rather than go through the trouble of replacing their bearings. Ok... a slight uphill gradient prevents forward motion, but doesn't hinder backward motion - so surely the uni can fly out behind you easier. I can see that the coast will be shorter and not gain speed (good thing!) as it would if you were on a slight downhill, but I'm still not sure if it would make things easier. It's really not clear in my head... maybe I need to draw myself some diagrams. As to making the resistant bearings, I found salt water corrosion does a good number on my skateboard wheel bearings... Hehe. *:wq* Did I read that right? Are you using VI to edit your postings? Helloooo uber-geek! If that's truly the case then I can no longercall myself a geek. It looks like, yet again, the bar has been raised. I don't use vi to edit posts - just pine. (Screendump of writing this post he http://www.pygmygoat.net/temp/r.s.u.jpg ) vi is my editor of choice for programming, web development and so on. I won't try to convince anyone of its merits - worse than religious evangelism Cheers, Stu -- :wq
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#4
June 2nd 05, 07:56 AM
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On Wed, 1 Jun 2005 13:59:42 +0100, Stu Carter wrote:
When I think about extreme cases of high and low rolling resistance, it feels that my hypothesis is right, but how much effect would normal levels of differing resistance have? If the wheel isn't turning, then I can see that in extreme cases your hypothesis is right. In that case your wheel is a solid (yet sort of pivoting around the tyre contact patch) support. The resistance acts one way or the other, depending on the direction of the force acting on it. But if, in spite of the high resistance, the wheel would be constantly rolling in one direction, I don't think the high resistance would help you. It would ensure a constant deceleration which you have to counteract with going downhill (or by losing speed). But other than that it would not provide any stability because the resistive force is constant in direction. I think. Klaas Bil - Newsgroup Addict -- wouldnt you be grumpy if somone just said you had PMS? - jagur
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#6
June 2nd 05, 10:58 AM
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Stu Carter wrote: * vi is my editor of choice for programming, web development and so on. I won't try to convince anyone of its merits - worse than religious evangelism :wq * member of the same church since 1984 (but of the ESCZZ chapel  )-used ed beforehand- -- wobbling bear - GranPa goes-a-wobblin' One Wheel : bear necessity ------------------------------------------------------------------------ wobbling bear's Profile: http://www.unicyclist.com/profile/3716 View this thread: http://www.unicyclist.com/thread/40865
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#7
June 2nd 05, 11:26 AM
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another option would be to over-tighten the bearing holders -- mikepenton - sometimes level ------------------------------------------------------------------------ mikepenton's Profile: http://www.unicyclist.com/profile/7090 View this thread: http://www.unicyclist.com/thread/40865
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#8
June 2nd 05, 07:22 PM
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If your amount of rolling resistance is constant, I don't see it affecting your fore-aft balance. If you have input into it, such as in gliding, this would of course be entirely different. Only if you have a way lot of friction would you have something useable to actually push against. In other words, the resistance of the bearings gives "push back." On a big wheeled unicycle, one of the reasons you can ride much farther without a dismount is because pedal input not only moves the wheel in the desired direction, the mass of the wheel allows you to push back against it. For example. Ride into a corner somewhere, with your pedals level. Now if you press down on the front pedal, what happens? The cycle will lean back. You can actually use this force to kind of shoot away from the wall, if done right. -- johnfoss - The wilder Wilder John Foss, the Uni-Cyclone "jfoss" at "unicycling.com" -- www.unicycling.com "Read the rules!" -- 'IUF Rulebook' (http://www.unicycling.org/iuf/rulebook/) -- 'USA Rulebook' (http://www.unicycling.org/usa/competition/) ------------------------------------------------------------------------ johnfoss's Profile: http://www.unicyclist.com/profile/832 View this thread: http://www.unicyclist.com/thread/40865
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#9
June 3rd 05, 12:39 AM
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Resistance and freewheeling...
Stu Carter wrote: * *:wq* Did I read that right? Are you using VI to edit your postings? Helloooo uber-geek! If that's truly the case then I can nolonger call myself a geek. It looks like, yet again, the bar has been raised. I don't use vi to edit posts - just pine. (Screendump of writing this post he http://www.pygmygoat.net/temp/r.s.u.jpg ) vi is my editor of choice for programming, web development and so on. I won't try to convince anyone of its merits - worse than religious evangelism Cheers, Stu -- :wq * Why cant you and others just......register? -- forrestunifreak - Why change this thing, anyway? "You do not make the unicycle-the unicycle makes you." ~Y.C. tv 'torkerusa.com' (http://torkerusa.com) ------------------------------------------------------------------------ forrestunifreak's Profile: http://www.unicyclist.com/profile/6828 View this thread: http://www.unicyclist.com/thread/40865
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#10
June 3rd 05, 03:00 AM
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Resistance and freewheeling...
"forrestunifreak" ist.com writes:
Why cant you and others just......register? Oh, we can. We most certainly can. Perhaps you meant to ask a different question. Ken P.S. On the subject of geekitude, has anyone else modified their newsreader to replace tinyurls with the URIs the resolve to?
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