Capricorn Posted June 20, 2016 Posted June 20, 2016 That is related to hydraulics though, this is related to gasses. I may have missed the connection though and just wanted to throw in a chirp while I eat this here popcorn. There are minor changes in behaviour due to compressibility effects under dynamic conditions, but the basic principle remains the same as the pressure, force, area relationship applies to all fluids, whether its liquid or gas. 6 bar pressure is 6 bar pressure, whether its liquid or gas in this case. Since the situation describes static loading, compressibility effects don't come into play, and the P= F/A relationship holds true as is.
Captain Fastbastard Mayhem Posted June 20, 2016 Posted June 20, 2016 minor changes in behaviour due to compressibility effects under dynamic conditiosn, but the basic principle remains the same as the pressure, force, area relationship applies to all fluids, whether its liquid or gas. 6 bar pressure is 6 bar pressure, whether its liquid or gas in this case. Since the situation is describes static loading, compressibility effects don't come into play, so the P= F/A relationship holds true.Bazinga.
raptor-22 Posted June 20, 2016 Posted June 20, 2016 can we lock this thread till everyone has read up on Boyles Law?
porqui Posted June 20, 2016 Posted June 20, 2016 Yep !! But I prefer Dalton's Law Some very interesting info here http://sheldonbrown.com/tires.html Still one of my favourites and all time "go to" sitesHier kan jy nie stry nie!! .
Eugene Brown Posted June 20, 2016 Posted June 20, 2016 Or we can accept the rim manufacturer's answer, being that the rim can handle a higher inflation pressure with a smaller volume tyre! End of debate I'm sure they will not make a statement like that without being certain that their product can live up to the higher pressure in that configuration, partly because they are proud Swiss engineers , and partly because, in the modern business world, there is a very real threat of damages lawsuits against directors of a business in their personal capacity, and nobody wants to go there.
Rocket-Boy Posted June 20, 2016 Posted June 20, 2016 There are minor changes in behaviour due to compressibility effects under dynamic conditions, but the basic principle remains the same as the pressure, force, area relationship applies to all fluids, whether its liquid or gas. 6 bar pressure is 6 bar pressure, whether its liquid or gas in this case. Since the situation describes static loading, compressibility effects don't come into play, and the P= F/A relationship holds true as is.Thanks for the explanation, as mentioned before Im just a sideline popcorn muncher.Im loving that this thread has has so many conflicting views but has managed to stay civil and informative at the same time.
Captain Fastbastard Mayhem Posted June 20, 2016 Posted June 20, 2016 Thanks for the explanation, as mentioned before Im just a sideline popcorn muncher.Im loving that this thread has has so many conflicting views but has managed to stay civil and informative at the same time.thing is, only one of those views is correct
Showtime Posted June 20, 2016 Posted June 20, 2016 Thanks for the explanation, as mentioned before Im just a sideline popcorn muncher.Im loving that this thread has has so many conflicting views but has managed to stay civil and informative at the same time.It is quite refreshing that people can think out loud without fear of ridicule. Let's hope it stays that way. What is so serious about being wrong sometimes in any case [emoji3] Sent from my iPhone using Tapatalk
Captain Fastbastard Mayhem Posted June 20, 2016 Posted June 20, 2016 It is quite refreshing that people can think out loud without fear of ridicule. Let's hope it stays that way. What is so serious about being wrong sometimes in any case [emoji3] Sent from my iPhone using TapatalkNothing at all. As long as you're prepared to acknowledge when you are, and change your POV after being proven so.
Tandemonium 2 Posted June 20, 2016 Author Posted June 20, 2016 Eugene my rims are the 540 tandem hub with p545, 700 c rims. I will try and upload their pressure chart that shows you what size tyre fits to your size rim.
Eugene Brown Posted June 20, 2016 Posted June 20, 2016 Eugene my rims are the 540 tandem hub with p545, 700 c rims. I will try and upload their pressure chart that shows you what size tyre fits to your size rim.Thanks Anton, that would be super. If it's a problem, I'll PM you my rim/hub model numbers when I get home this evening.
Tandemonium 2 Posted June 20, 2016 Author Posted June 20, 2016 Thanks Anton, that would be super. If it's a problem, I'll PM you my rim/hub model numbers when I get home this evening.dt swissTire-Pressure-Dimension20150820.pdf
Tandemonium 2 Posted June 20, 2016 Author Posted June 20, 2016 the Tech looked up my rim sizes inner and outer and then based on that he said 6bar is fine . The rims came out with racing ralph 2.1 tyres . If I look at that size the chart says I should not exceed 4 bar . So the 4 bar looks as if it was specific for the 2.1 profile .
Rocket-Boy Posted June 20, 2016 Posted June 20, 2016 thing is, only one of those views is correct Im pretty sure everyone with a horse in this race thinks they are right!
madbradd Posted June 21, 2016 Posted June 21, 2016 dt swissTire-Pressure-Dimension20150820.pdf This is pretty interesting, especially if you plot the tyre size (I just used pi x r x r for area of the tyre section, but didn't take the change in "length" of the tyre to account for exact volume) and pressure.
madbradd Posted June 21, 2016 Posted June 21, 2016 Im pretty sure everyone with a horse in this race thinks they are right! I'm an engineer. I've assumed that the horse is a sphere so that the math is easier.
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