Posted by willie in mn on January 05, 2013 at 17:52:17 from (67.142.168.22):
In Reply to: Re: Tire pressure posted by 55deere70 on January 05, 2013 at 17:16:12:
The nitrogen theory is a sales gimmick. Ambient air, what is out there in nature, is 80% +/- nitrogen, & 20% other gasses & water vapor. Thing about bottled nitrogen is that the process of compressing & filling the tanks squeezes out the water. Same thing happens with air. Ever notice the water collected in compressor tanks? Water vapor expands with heat more than the other gasses. A good drier, such as used inline for paint guns, will give the same result without the major expense. Size of molecules has very little, if any, effect on leakage. Wayne started out right, 10 deg temp change makes approx 1 psi pressure change. To stretch the point a bit, winter air does actually contain a bit less water vapor tham summer air. Willie
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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