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2005-12-22, 08:04 PM
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#1 |
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uni newbie
Join Date: Nov 2005
Location: upper michigan
Age: 22
Posts: 98
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Helium filled tires
Hey ive heard a lot of stuff about helium filled tires i was wondering if it really made a differance in hopping capabilities.
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Live's too short to waste on sleep |
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2005-12-22, 08:17 PM
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#2 |
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blank
Join Date: Oct 2005
Location: Exeter, Devon, UK
Age: 23
Posts: 1,415
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no but i have heard somthing about magic lobsters....
Mike |
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2005-12-22, 08:21 PM
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#3 |
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From the Over 50 Group
Join Date: Aug 2005
Location: Memphis, TN, USA
Age: 60
Posts: 1,205
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If you are suggesting that the helium makes the unicycle lighter, I seriously doubt the tire would hold enough helium to make any significant difference in weight.
Nothing scientific here, just my opinion. Consider this. A toy balloon would probably hold about the same volume of helium as a unicycle tire and that just barely holds up the toy balloon.
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A man can fail many times but he isn't a failure until he begins to blame someone else. - Waite Phillips The art of medicine consists of keeping the patient amused while nature heals the disease. - Voltaire |
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2005-12-22, 08:21 PM
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#4 |
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Registered User
Join Date: Feb 2005
Posts: 1,529
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 EEK
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2005-12-22, 08:23 PM
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#5 |
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Registered User
Join Date: Feb 2005
Posts: 1,529
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yes but ive heard that the tire getty squishier and more bouncy than normal air.
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2005-12-22, 08:55 PM
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#6 |
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I got infinite skillz
Join Date: Aug 2004
Location: Stockholm Sweden
Age: 23
Posts: 2,330
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Helium is a waste of time and stuff. The helium will not stay in the tube for very long, and when the helium really is in the tube it will make as much diference as if you cleaned your uni from dust before you went out for a ride.
But I see much potential in the magic lobsters... Last edited by fexnix; 2005-12-22 at 08:55 PM. |
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2005-12-22, 09:00 PM
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#7 |
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Registered User
Join Date: Mar 2005
Location: Warwickshire, UK
Age: 27
Posts: 4,786
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There have been many threads on this, i'm not sure about the dust but certainly scrapping the paint of your frame would save more weight. Using nitrogen would mean that the tyre pressure was affected less by temperature (that's why it's used in Formula 1) but because of the change in the properties of the rubber the tyre pressure would need to be changed anyway, so no help there. As fexnix suggested, air tight does not mean sealed for all gases, helium is the second smallest molecule gas, it's pretty hard to keep it in one place for very long.
I can't eat lobsteres, magic or otherwise.
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Dave - what a thoroughly post-modern subversion of the cycling genre - |
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2005-12-22, 09:04 PM
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#8 | |
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I got infinite skillz
Join Date: Aug 2004
Location: Stockholm Sweden
Age: 23
Posts: 2,330
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Quote:
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2005-12-23, 04:38 AM
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#9 |
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Walrus
Join Date: Feb 2005
Location: Whitefish, Montana
Age: 24
Posts: 778
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screw helium.. go hydrogen!... actually... i dont think you could find a difference... you might be able to make the hydrogen blow up... but that would take a ton of skill to get a spark inside your tube...
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Toast dave psychoteledave2(at)hotmail(dot)com Team Yams Last edited by James_Potter on 2005-10-5 at 3:58pm Last edited by Unitik908 on 2005-09-06 at 04:12 AM Last edited by forrestunifreak on 2005-09-09 at 03:51 AM |
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2005-12-23, 04:41 AM
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#10 |
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The Duke of Hazzards
Join Date: Feb 2005
Location: Arizona
Age: 24
Posts: 73
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Not really just run some electirc wires inside the tube. The run a current through it. KBAM... Runs outside to try....
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2005-12-23, 05:40 AM
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#11 |
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bored
Join Date: Jul 2005
Location: Right, Here
Posts: 70
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i saw on tv one time it took 75 helium balloons to lift up a chiuaua.
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HAHA |
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2005-12-23, 07:39 AM
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Sir Prince of Newsgroupia
Join Date: Jan 2003
Location: Zoetermeer, Netherlands
Age: 59
Posts: 2,303
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Nitrogen less temperature-sensitive? Doesn't it follow the law of Boyle - Gay Lussac then?
Hydrogen in your tyre does not explode when a spark is ignited in it. Only if you mix it with oxygen, which would negate the weight issue. There have been lots of threads about helium in the tyre. The physical effect is very small. As always, the Google search facility is more powerful than this site's search to find them. I've done the (little) work for you: http://groups.google.com/groups?as_q...=2005&safe=off |
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2005-12-23, 08:47 AM
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North Shore ridin'
Join Date: Apr 2002
Location: Carmichael, CA
Posts: 14,933
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Quote:
 Speaking of lifting stuff with balloons: We saw the new Cirque du Soleil show, Corteo, the other night. Excellent show; one of the best Cirque shows I've seen! In one part of the show, a performer comes out in a harness, attached to a bunch of weather-sized balloons. At least eight of them. Her harness allows her to spin around in various directions. After a while, it becomes apparent that her rigging must be pretty sophisticated. Then, the guy tossing her up and down tosses her out over the audience. Members of the audience have to push her back up into the air! At this point it's obvious there is no rigging attaching her balloons to anything else. She's really floating, made almost neutrally bouyant by those balloons! But it's a lot of balloons, and she's a very small person, maybe 3' tall. Still, I'd love to play with a setup like that...
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John Foss "jfoss" at "unicycling.com" www.unicycling.com "Unicycling is a way of looking at the world, making a choice to slow down, finish what you start, doing things not because they're easy, but because they're a challenge." -- Nurse Ben |
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2005-12-23, 12:49 PM
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#14 | |
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U
Join Date: May 2005
Location: Portsmouth, UK
Age: 44
Posts: 119
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Quote:
http://www.zipadeeday.com/viewarticle.asp?article=3 Hooked
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2005-12-23, 07:30 PM
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#15 | |
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Registered User
Join Date: Mar 2005
Location: Warwickshire, UK
Age: 27
Posts: 4,786
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Quote:
I'm not sure if pv=nRT can be applied in this situation for that reason, the compressibilty factor Z needs to be taken in to account in the calculation. Now i can't remeber if Z depends on the gas being used or not, but i think it does because it's to do with, amongst other things, the size of the molecules and the inter-molecular forces, which are different for each element. To be honest i'm not entirely sure what the answer is, although i am sure we can work it out between us.
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Dave - what a thoroughly post-modern subversion of the cycling genre - |
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