As another has posted you have mixed up a few things: Your example of the ocean and the pressure increasing as we go to deeper water is correct. In a simliar manner we are all in an ocean of air and the air pressure increases as we go deeper in that ocean of air. However, air is a little different than water in that it's density increases significantly as the pressure is increased. At sea level we are in the deepest part of the air ocean and the pressure and density of air is at its maximum. Conversely at the top of Pikes Peak we are in "shallow air" and the pressure and therefore density is much less than at sea level. This air pressure is applied equally at the inlet side and the exhaust side of an engine so the change in power output results from the change in air density. An exception would be for forced induction engines; the inlet air is pressurized which increases the density and in the event delta pressure is increased across the inlet system the air velocity can also increase. In this case the change in power results from the air density increase and to a smaller degree the velocity increase.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that�s wha
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