Density altitude (DA) reduces aircraft performance; it's pressure altitude corrected for nonstandard temperature and humidity. High temperature, humidity, and elevation all contribute to higher DA ...

Although density altitude does reduce performance of an aircraft, it doesn't automatically keep you on the ground.

In math speak, it is "pressure altitude plus the sum of 120 times the difference between the outside air temperature and standard temperature” or “density altitude = pressure altitude + (120 x ...

Pressure is next with a 0.01-in/Hg change also worth a 100-foot change in density altitude. Finally, a 10 percent difference in humidity can also affect the density altitude by 100 feet.

The achievement is "one of those unforgettable peaks that define great human and technological adventures," the SolarStratos ...

Swiss pilot Raphael Domjan beat the altitude record for a solar-powered electric plane in a flight that took him soaring to 9,521 metres, his team announced Wednesday. Domjan is aiming to be the first ...

"It is the pressure altitude corrected to standard density altitude that is recognized as the official reference for aviation altitude records," the SolarStratos team said.

SolarStratos calls the plane “daring and finely engineered.” It can take off at 31 mph (50 kph). Its maximum speed is 87 mph (140 kph). Cruising speed is around 50 mph (80 kph). The pilot has a ...