I now fill my tires with Invar to eliminate the expansion and contraction due to temperature, otherwise they go out of tune. And I connect them with Heliax instead of LMR-400 to cure the static.
Chuck WB2EDV ----- Original Message ----- From: "Tony King - W4ZT" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, November 18, 2004 12:58 AM Subject: RE: [Repeater-Builder] radial tire static? > > I believe you'll find the following interesting: > > Gay-Lussac and Avogadro's Law > > * At a given temperature, the number of moles of a gas is directly > proportional to its volume. > * The molar volume of a gas, regardless of its identity, is constant > * n/V = constant (at constant T and P) > > If one has a gas mixture, the partial pressure of each gas is proportional > to its number of moles. > > The total pressure of the mixture is a simple sum of the partial > pressures. > > That is to say simply, there isn't enough difference in "air" and pure > nitrogen to see ANY difference in the expansion and contraction. > > What you do see is a difference in the density of nitrogen and oxygen. > Nitrogen, being more dense, migrates less through other materials. And, > nitrogen doesn't cause oxidation of other materials which can eventually > lead to failure, but not likely in a common automobile tire. > > Dry nitrogen is used in large aircraft tires all the time primarily > because > of the much higher pressures involved and the fact that it will not > migrate > through the tire material. It also will not support the oxidation of the > tire or wheel. For automotive applications, I can't see where it would > make > a bit of difference to anyone except those SELLING THE IDEA that it will! > That is unless you're too lazy to check your tire pressures and are > willing > to pay someone else large sums of money to take care of that minute task > for you. > > Of course this really isn't a tire static issue ;) > > 73, Tony W4ZT > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
