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2020 LTS Keflavik news post draft: Difference between revisions
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Suddenly I had a really serious problem! Obviously the moisture above the water did create icing on my plane and I slowly lost airspeed. The Pitot tube was obviously frozen, and I supposed also that the static ports where frozen. | Suddenly I had a really serious problem! Obviously the moisture above the water did create icing on my plane and I slowly lost airspeed. The Pitot tube was obviously frozen, and I supposed also that the static ports where frozen. | ||
[''The Pitot tube is used to determine the speed of the aircraft relative to the (moving) air - the airspeed. The tube opening faces the oncoming air, and the pressure caused the air ramming in to the tube is measured. The faster the air flow the higher the pressure. The denser the air, the higher the | [''The Pitot tube is used to determine the speed of the aircraft relative to the (moving) air - the airspeed. The tube opening faces the oncoming air, and the pressure caused by the air ramming in to the tube is measured. The faster the air flow, the higher the pressure. The denser the air, the higher the pressure. Imagine being dipped in a stream of flowing water - the faster the water flow, the higher the force (and the higher the pressure - that is, more force per unit area depending on how large you are ). If the water was replaced by something denser like lava or lead, then the pressure will increase.''] | ||
[''The static port(s) are used in trying to determine altitude, and how fast an aircraft is ascending or descending (vertical speed). Static ports are openings that are connected to tubes that 'sample' the air pressure. Unlike the Pitot tube, static ports' openings don't face the oncoming air head-on to avoid pressure from ramming - although static ports on different sides of aircraft are used to try to reduce the effect of ramming air when there are winds blowing across the aircraft, or the aircraft is experiencing side-slip.'' ''Since pressure is being used, the values for altitude and vertical speed vary depending on weather - the pressure at the altitude of the ground beneath a craft can be different on different days. The way the pressure changes with altitude above ground can also change - including as a result of water in the atmosphere changing state.''] | [''The static port(s) are used in trying to determine altitude, and how fast an aircraft is ascending or descending (vertical speed). Static ports are openings that are connected to tubes that 'sample' the air pressure. Unlike the Pitot tube, static ports' openings don't face the oncoming air head-on to avoid pressure from ramming - although static ports on different sides of aircraft are used to try to reduce the effect of ramming air when there are winds blowing across the aircraft, or the aircraft is experiencing side-slip.'' ''Since pressure is being used, the values for altitude and vertical speed vary depending on weather - the pressure at the altitude of the ground beneath a craft can be different on different days. The way the pressure changes with altitude above ground can also change - including as a result of water in the atmosphere changing state.''] | ||