A static port is a vent that provides air at athmospheric pressure to operate the pito-static system. This is usually located in the side of the fuselage. There are usually two such vents, one on each side, connected by a Y-shaped tube from which the pitot-static instruments obtain their reading. The dual installation prevents sideways movement from affecting the accuracy of the readout.
A blocked static port IS A VERY SERIOUS PROBLEM since it will affect all pitot-static instruments. A blocked static port will even make the altimeter to remain immovable at the altitude when the port becomes blocked. Common causes of a blocked static port is icing. Also the vertical speed indicator (VSI) will stay at zero even if vertical airspeed increase/decrease. And in an airspeed indicator, it will indicate the airspeed to be read less than it actually is as the aircraft climbs. When an airplane is descending, the a/s will be over-reported. For most most a/c with unpressurized interior cabins, there is an alternate static source which is available. This can be toggled from within the cockpit of some model aircraft.
The most RECENT accident regarding this technical problem happened in June 2009 on Air France Flight 447 (a scheduled commercial flight from Rio de Janeiro to Paris). It is believed (though not conclusivley) that a pitot tube error occurred while in flight over the Atlantic Ocean, which caused the crash of the Airbus A330-200. All aboard were lost.
The static port measures ambient air pressure around the airplane. This is compared with air pressure in the pitot tube (a tube that points directly into the airstream) to determine airspeed. It is also compared with a standard pressure to determine altitude.
I am so glad the answer who states he is a pilot for 17 years and 11 years as an aircraft mechanic is not working or flying with me. He states "The static port measures the pressure of the air surrounding the plane. It is placed carefully so that the air pressure is not affected by the planes motion. Using the static pressure, the planes speed through the air, altitude, and vertical speed can be determined."
The static port does not measure anything! It is a vent so that other instruments like the vertical speed indicator and airspeed indicator and other intstruments will work for what they are intended to measure. WOW Talk about wannabees. maybe he wants to replace Mike Beech as the resident wannabee.
and 5 thumbsup for this joker! Either there's plenty of "dumbasspilots" around here or somebody has got multiple accounts. I won't even be surprised if he gets BA -wink-wink. ( ; - )
The static port measures the pressure of the air surrounding the plane. It is placed carefully so that the air pressure is not affected by the planes motion.
Using the static pressure, the planes speed through the air, altitude, and vertical speed can be determined.