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October 12th, 2005, 10:17
| #1 |
| Junior Member  Join Date: May 2005
Posts: 88
|  Static Pressure If air moving faster has a lower pressure, then why is the static pressure pretty much constant..even with chages is airspeed? I mean, if you speed up from 85kts to 130 or more, doesnt it seem like the static pressure should change and throw off your VSI, Altimeter, and possibly even your Airspeed Indicator? Or is the change in pressure so minute that it is negligible to the instruments and they are not affected?
__________________ A person is never who they say they are in one single moment...they are who they have been throughout the time you have known them Last edited by dbakeg00; October 12th, 2005 at 10:19. Reason: souded like an idiot |
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October 12th, 2005, 12:32
| #2 |
| Junior Member Join Date: Apr 2003
Posts: 213
| i would assume its because they place the static ports in a spot where there isnt a venturi effect happening. |
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October 12th, 2005, 16:56
| #3 |
| Junior Member  Join Date: Dec 2004 Location: Memphis
Posts: 265
| Exactly. For example, take a look at how the area around the three holes in the static port is raised. That raised area keeps the flow from reducing the static pressure.
__________________ Jonathan |
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October 18th, 2005, 14:21
| #4 |
| Senior Member  Join Date: Mar 2002 Location: was Ophir, CO, now in SLC!
Posts: 1,477
 | Additionally, consider that static pressure and the ports measure just that "static" pressure, not dynamic pressure. Dymanic would be more like the pitot tube and in the airflow directly. A static port equalizes the pressure inside the system. As part of understanding it imagine what the system would be like without the port. It is the classic icing situation.
__________________ Get in shape on your overnights: http://www.fitnessanywhere.com/Merch...27&AFFIL=Ophir |
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