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Altitude: Difference between revisions
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→Pressure altitude
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Altitude in terms of the distance above a certain point. | Altitude in terms of the distance above a certain point. | ||
==Pressure altitude== | ==Pressure altitude== | ||
Altitude in terms of the air pressure. | Altitude in terms of the air pressure. The altimeter will display the barometric pressure expressed in feet. (i.e. your expensive piece of equipment has been reduced to a barometer) | ||
*Pressure altitude gives the same result for every aircraft independent from the departing airfield of the aircraft. | |||
*Pressure altitude will change with the weather but this is true for all aircraft sharing the same area. | |||
*When wanting to use Pressure altitude, the altimeter must be set to standard pressure = 29.92" Hg = 1013.25 mbar. | |||
*Never use Pressure altitude during approach since the altimeter does not display the altitude. | |||
===Flight level=== | ===Flight level=== | ||
[[#Pressure altitude]] divided by 100 feet is referred to as the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions); so when the altimeter reads 18,000 ft on the standard pressure setting the aircraft is said to be at "Flight level 180" or FL180 | [[#Pressure altitude]] divided by 100 feet is referred to as the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions); so when the altimeter reads 18,000 ft on the standard pressure setting the aircraft is said to be at "Flight level 180" or FL180. | ||
==Density altitude== | ==Density altitude== | ||