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 - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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