SQuiT-man Posted January 16, 2005 Report Share Posted January 16, 2005 I read something on a topic here the other day about the idea of having helium in tyres which made me think. Has anyone actually tried it before? By the way 30 psi helium would be lighter than 30 psi air (which someone said it wouldnt on this topic), as is proven by baloons- the air in a regular baloon is at the same pressure as the helium in a helium baloon, but the helium baloon is much lighter!) It probably wouldnt make much difference on the bikes weight anyway, but I mite try it when I can get hold of sum helium anyway for a laugh! Scott Quote Link to comment Share on other sites More sharing options...
tipsy Jock Posted January 16, 2005 Report Share Posted January 16, 2005 (edited) I read something on a topic here the other day about the idea of having helium in tyres which made me think. Has anyone actually tried it before? By the way 30 psi helium would be lighter than 30 psi air (which someone said it wouldnt on this topic), as is proven by baloons- the air in a regular baloon is at the same pressure as the helium in a helium baloon, but the helium baloon is much lighter!) It probably wouldnt make much difference on the bikes weight anyway, but I mite try it when I can get hold of sum helium anyway for a laugh! Scott ← helium molecules are smaller so they'll pass through your tubes. suppose in a sense that is lighter :o Pete Edited January 16, 2005 by tipsy Jock Quote Link to comment Share on other sites More sharing options...
Ali C Posted January 16, 2005 Report Share Posted January 16, 2005 (edited) good luck finding an inner tube that will hold it :o too late Edited January 16, 2005 by Ali C Quote Link to comment Share on other sites More sharing options...
TheCircus Posted January 16, 2005 Report Share Posted January 16, 2005 You would lose about 5grams of weight. Just don't do it. Quote Link to comment Share on other sites More sharing options...
SQuiT-man Posted January 16, 2005 Author Report Share Posted January 16, 2005 lol! Ok, I see. I wont bother then. Interesting idea though. Quote Link to comment Share on other sites More sharing options...
Alexxx Posted January 16, 2005 Report Share Posted January 16, 2005 Wouldn't say 40 PSI of helium be the same weight as 40 PSI of just air? Alex Quote Link to comment Share on other sites More sharing options...
JT! Posted January 16, 2005 Report Share Posted January 16, 2005 Me and a friend were talking about this in our physics lesson. He said that helium has a lower pressure anyway, thats why its lighter. So 40psi of air and helium will weigh the same. but i didnt think it was right. :o Quote Link to comment Share on other sites More sharing options...
dave85 Posted January 16, 2005 Report Share Posted January 16, 2005 For the same mass of gas (same volume and pressure), helium weighs one seventh the weight of air. Quote Link to comment Share on other sites More sharing options...
011001000110010101110010 Posted January 16, 2005 Report Share Posted January 16, 2005 Dave Marshall actually has He in his tyres. Quote Link to comment Share on other sites More sharing options...
Tomm Posted January 16, 2005 Report Share Posted January 16, 2005 For the same mass of gas (same volume and pressure), helium weighs one seventh the weight of air. ← Wow, so if my whole bike was air, it would weigh around 3.5lbs. Unfortunately it's not, so I'd save about 2 g and have to pump up my tyres all the time... Quote Link to comment Share on other sites More sharing options...
stuntsbyjon Posted January 16, 2005 Report Share Posted January 16, 2005 (edited) Hhhhmmm, also would mean carrying a helium tank around on your trials incase you got a flat. :o but yeah, 40 PSI of helium is the same weight as 40 PSI of normal air, plus it may risk explosion if your not careful, then you'd need new bits, all to save 4g? (Y) Nah, sod that... Edited January 16, 2005 by stuntsbyjon Quote Link to comment Share on other sites More sharing options...
dave85 Posted January 16, 2005 Report Share Posted January 16, 2005 Hhhhmmm, also would mean carrying a helium tank around on your trials incase you got a flat. :o but yeah, 40 PSI of helium is the same weight as 40 PSI of normal air, plus it may risk explosion if your not careful, then you'd need new bits, all to save 4g? (Y) Nah, sod that... ← Keep it in your downtube, like Syntace. Plus, helium isnt explosive, you have a real job on to get it to react with anything. If you want to save more weight: Hydrogen, half the density of helium, and you'll go up like the Hindenburg if you run over a fag end :P Quote Link to comment Share on other sites More sharing options...
stuntsbyjon Posted January 16, 2005 Report Share Posted January 16, 2005 I thought Helium was explosive... :- Bloody chemists online are crap.. (Y)" Quote Link to comment Share on other sites More sharing options...
Dr. Nick Riviera Posted January 16, 2005 Report Share Posted January 16, 2005 Helium (He) is the second lightest element (hydrogen being the lightest) with a gaseous specific gravity of 0.138. It is a colorless, odorless, tasteless inert gas at room temperature and atmospheric pressure. Its boiling point is -452.1°F (-268.9°C) at atmospheric pressure. Helium is present in dry air at a concentration of 0.0005%. Helium is one of the noble gases. Like the other noble gases, helium is chemically inert. Reactions with other elements occur only with difficulty and the resulting compounds are quite unstable. Helium is the most difficult of all gases to liquefy and is impossible to solidify at atmospheric pressure. These properties make liquid helium extremely useful as a refrigerant and for experimental work in producing and measuring temperatures close to absolute zero. Liquid helium can be cooled almost to absolute zero at normal pressure by rapidly removing the vapor above the liquid. First discovered in the spectrum of the sun's corona during an eclipse in 1868, helium was first isolated from terrestrial sources in 1895. In 1907 British physicist Sir Ernest Rutherford showed that alpha particles are the nuclei of helium atoms. Helium is the second most abundant element in the universe, after hydrogen; however, it is rare on earth. Its principal source is natural gas wells where the helium is extracted from pockets in the crude natural gas stream and purified. It is so light that once released it escapes the earth's atmosphere and cannot be recovered. Helium is widely used as an inert gas in the arc welding process and as an inert gas in the production of reactive materials. Its permeation rate and ease of detectability make it an ideal medium for leak detection. Also, its low specific gravity and nonflammability allow its use in lighter-than-air applications such as the filling of balloons and blimps. To reduce risk of the bends, a mixture of helium and oxygen is used as a breathing gas for deep-sea diving, since helium is less soluble in human blood than nitrogen. Helium is also used in the pressurizing of rockets before takeoff and the pressurizing of tanks of rocket fuel. Liquid helium is used in superconducting magnet applications, including magnetic resonance imaging (MRI). DOT Information DOT Name: Helium DOT Hazard Class: Nonflammable Gas DOT Label: Nonflammable Gas DOT ID No.: UN1046 CAS No.: 7440-59-7 Valve Outlet: CGA 580 Physical State in High Pressure Cylinder: Gas Major Hazards: High Pressure Suffocation Fire Potential: Non-Flammable Physical Properties of Helium Formula: He Molecular Weight: 4.003 lb/mol Specific Volume at 70°F and 1 atm: 96.71 ft3/lb (6.00 m3/kg) Specific Heat: 4.97 BTU/lbmol-deg F@ 70 deg. F Specific Gravity: .138 Gas Density: .010346 lb/ ft3 @ 70 deg. F. 14.7 PSIA Boiling Point: Temperature: -452.1 deg. F (-268.9 deg. C) Liquid Density: 7.804 lb./ft3 Latent Heat: 8.778BTU/lb. Critical Point: Temperature: -450.3 deg. F Pressure: 33.2 PSIA Melting Point: Temperature: 455.8 deg. F Pressure: .0735 PSIA now be quiet all of you Quote Link to comment Share on other sites More sharing options...
Shaun H Posted January 16, 2005 Report Share Posted January 16, 2005 If this sort of thing was possible I'd of though it would have been done in roadie racing already? Can't really see the advantages apart from a few grams less seeing as air is so light already though. Suppose if you got bored you could suck in your tyres and try to chat up some ladies (Y)" Quote Link to comment Share on other sites More sharing options...
stuntsbyjon Posted January 16, 2005 Report Share Posted January 16, 2005 I like the idea of breathing it in.. (Y) I sound daft as F*%k when I do.. :- I didn't know you were that into chemistry daahnhillaaaa... you have shocked me. :- Quote Link to comment Share on other sites More sharing options...
Dr. Nick Riviera Posted January 16, 2005 Report Share Posted January 16, 2005 its the ginger hair fools most people mate Quote Link to comment Share on other sites More sharing options...
011001000110010101110010 Posted January 16, 2005 Report Share Posted January 16, 2005 Thank you google. Quote Link to comment Share on other sites More sharing options...
Charlie - CTT Posted January 16, 2005 Report Share Posted January 16, 2005 come on now guys this is getting stupid. look at some of the stuff people can do without realy light bikes. e.g tra bla bla bla. i think it just takes practice not realy stupid light bikes. and even the bikes. look wat they were like when trials started. gt outpost ha any ways (Y) night night would b different to have hellium in ur tubes though :P Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted January 16, 2005 Report Share Posted January 16, 2005 Dave Marshall actually has He in his tyres. ← I actually don't Fred!!! It's all pure skill (Y) Dave Quote Link to comment Share on other sites More sharing options...
JT! Posted January 16, 2005 Report Share Posted January 16, 2005 I don't think the post is about making you better on a bike, and the lighter the bike the better. Its just a thought. (Y) Quote Link to comment Share on other sites More sharing options...
froggy Posted January 16, 2005 Report Share Posted January 16, 2005 (edited) You should try riding around with a really big bunch of helium filled baloons tied to your bike. Or perhaps filling your frame with helium and making it air tight. OR when your out riding bring up the console and try sv_gravity 100 aaaahahahahahahahahahahaha to much cs (Y) :P :P Edited January 16, 2005 by Adamm Quote Link to comment Share on other sites More sharing options...
froggy Posted January 16, 2005 Report Share Posted January 16, 2005 (edited) I don't think the post is about making you better on a bike, and the lighter the bike the better. Its just a thought. (Y) ← Yeah I just bought a brand new top spec bike, I think I might drill the frame out. it might make me better. Edited January 16, 2005 by Adamm Quote Link to comment Share on other sites More sharing options...
Dylan_ Posted January 17, 2005 Report Share Posted January 17, 2005 (edited) I think putting 40 psi of helium, and 40 psi of air is the same.. because a 40 pounds of feathers is eaqual to 40 pounds of bricks (Y). Also it'd be really expensive just to pump a tire up. Edited January 17, 2005 by Dylan_ Quote Link to comment Share on other sites More sharing options...
Mark W Posted January 17, 2005 Report Share Posted January 17, 2005 It's not weight though, is it? Or am I thinking like a 'tard? 'cos does it have to be the same weight to exert the same pressure? Quote Link to comment Share on other sites More sharing options...
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