density altitude


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Related to density altitude: Pressure altitude

density altitude

[′den·səd·ē ′al·tə‚tüd]
(meteorology)
The altitude, in the standard atmosphere, at which a given density occurs.

density altitude

density altitude
Calculation of density altitude when pressure altitude and temperature are known.
An atmospheric density expressed in terms of the altitude, which corresponds with that density in the standard atmosphere. It is the pressure altitude corrected for temperature. Density altitude is used for computing and predicting aircraft and engine performance, including takeoff, climb, and landing performance, instead of true or pressure altitude. On most computers, it can be read directly when calculations for true air speed (TAS) are made.
References in periodicals archive ?
Density altitude tells you how the airplane will behave.
Pressure Altitude/Density Altitude (PADA)--computes the following parameters: sea level pressure (SLP), altimeter setting (ALSTG), pressure altitude (PA), density altitude (DA) and the standard atmosphere based on the upper/lower station pressure and the following optional data fields: station elevation (for ALSTG, PA, DA), 12-hour mean temperature (for SLP), temperature (for DA) and dew point for DA.
The combined effects of being slow, with a tailwind, in an environment of high density altitude, and in a high gross weight configuration, placed the CH-53D in a hover-out-of-ground-effect situation without sufficient power.
The elements to be controlled and understood must include the changes in the daily density altitude along with the different barometric pressure levels that occur in different geographic locations.
Measures: Altitude, barometric pressure, density altitude, dew point, heat stress index, relative humidity, temperature, wet bulb temperature (psychrometric, wind chill, wind speed, Battery: 2 AAA Lithium Batteries [Average life 400 hours), Price: $339, $199 (Model 3000), $739 (Model 4500) with ballistic software)
Srinivasan knew well the challenges they were about to face, but upholding the unit tradition they decided to take on the mission and operated their machines to the fringes of their limits as the mission involved flying into unknown territory and landing at a density altitude of approximately 23000 ft over an inhospitable glacier.
The inherent thrust limitation of the F-117, in conjunction with the high density altitude at Holloman AFB, combine to create high takeoff speeds and long takeoff roll distances; these factors make high speed aborts in the F-117 particularly hazardous.
We gave an impressive performance flying flawlessly in turbulence in a valley surrounded and filled with trees, breaking our own record of 7,000 feet by flying at a density altitude of 10,500 feet.
Capt Powers recognized the decrease in aircraft performance caused by the high density altitude and elected to delay gear extension until glide slope intercept.
With the field elevation of 3,338 feet and the outside air temperature of 110 F, the density altitude was 7,500 feet.
With temperatures topping 100 degrees, the Kizashi was running at a density altitude on the flats of 6,303 feet.
The flight test took place in 103-degree heat, equivalent to more than 6,000 feet of density altitude, and 5- to 10-knot winds.