So you are saying that forced induction which only increases the velocity of a set density of atmosphere entering a closed cylinder through valves or ports that are only open for a preset amount of time doesn't make up for the lack of natural pressure at sea level of 14>7 psi? Density is the amount of oxygen content in the atmosphere as a percentage. It is the same "density" at 5000' as it is at sea level but it doesn't have the pressure to move it into a low pressure area such as a cylinder or even your lungs. What does eventually fill them is still the same density as far as oxygen content but there is less total volume because of less pressure/velocity pushing it in there. The more cu in of "atmosphere" the more oxygen but the actual density (ratio) is the same. Atmosphere is not 100% oxygen.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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