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2004-01-05, 11:15 PM
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#1 |
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Registered User
Join Date: Jan 2004
Location: St. Paul, MN
Age: 21
Posts: 6
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science fair
I'm a 7th grader, and am doing a unicycle related science fair project. I had someone coast 5 meters, with different tire inflations, and I timed him. As I expected he went slower with the way under inflated tire, but I need some research about tire inflation, and its affect on speed, but when I google search it, it dosnt come up with anything helpful. Could someone point me to a good website.
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2004-01-05, 11:31 PM
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#2 |
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)-O <--Neat
Join Date: Sep 2003
Location: Finland
Age: 29
Posts: 725
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You pretty much said it yourself. More air -> harder tire -> less rubber on ground -> less friction -> more speed.The pattern of the tire affects too. I've seen a finnish site that had info about inflation and how much effect different tubes have on friction. The mass of the tire also affects. If you have a heavier tire it rolls a bit farther (and if you compare to a lighter tire at the same spot, faster).
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2004-01-06, 05:37 AM
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#3 |
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currently riding bikes
Join Date: Apr 2002
Location: Pittsburgh PA
Age: 29
Posts: 2,050
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The only problem I see with timing somone coasting is that thier speed starting might be slightly different every time which would change your results and not give you the results you want.
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No one said it was gonna be easy and I'm not afraid to try, with the odds stacked up against me I will have to fight, One Life One Wheel got to do it right. H2O -------MUNI MILITIA ------- One Wheeled Death Squad |
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2004-01-06, 08:43 AM
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#4 |
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Newsgroup User
Posts: n/a
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Re: science fair
On Mon, 5 Jan 2004 17:15:39 -0600, Rob-the-unrepentant
<Rob-the-unrepentant@NoEmail.Message.Poster.at.Unicyclist.com> wrote: >I had someone coast 5 meters, with different tire inflations, and I >timed him. I suppose that was done on a bike, not a unicycle? >I need some research about tire inflation, and its affect on >speed Schwalbe has (or had) a graph of rolling resistance version tyre pressure on their website. I forgot the url. If you Google for a few of those terms combined, you may find it and other helpful sites. Klaas Bil - Newsgroup Addict -- You have to keep in mind that those of us who post on RSU are not normal. - John Childs |
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2004-01-06, 10:35 AM
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#5 | |
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My Uzi is a Tongue
Join Date: Nov 2001
Location: {So-Lame,Oregon}
Posts: 6,197
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Quote:
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theres enough BS in life, without mobius contributing. Forget_Your_Life -------------------------------------- -------MUNI MILITIA ------- One Wheeled Death Squad twitter> @shot of jagur |
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2004-01-06, 02:25 PM
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#6 |
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Old dog, no tricks
Join Date: Sep 2002
Location: Park City, UT
Age: 58
Posts: 123
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Go to google, and enter:
"rolling resistance" "tire pressure" research You will find a variety of articles. Good luck, David Maxfield Mitchell, SD
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“Dance like you’ve never been hurt. Work like no one is watching. Love like you don’t need the money.” David Maxfield Park City, UT |
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