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Combining the data shown on your cockpit instruments helps you make better judgments. One example is Indicated Airspeed (IAS), which is the airspeed you read directly from cockpit instruments. It works by reading the difference between static pressure and total pressure from air flowing into a pitottube.
And ice doesn’t just make things slippery, it messes with the airflow over the wings, cuts down on lift, and ramps up drag. This leads to a serious loss of lift and an increase in drag. This roughness adds to friction drag, which can reduce lift and increase drag by as much as 50% on a wing’s leading edge and upper surface.
Airlines are upgrading older cockpits with newer displays, so this old indicator will soon become a relic. Ram air from a pitottube and static (undisturbed) outside air from a static port, usually a hole on the side of the fuselage. The instrument provides pilots with a surprising amount of information.
Air Force, in the cockpit of Convair F-106A Delta Dart 56-0467, at Edwards AFB, December 15, 1959, following his world speed record. Foust would describe the incident thusly: “The aircraft looked like the pitottube was stationary with the aircraft rotating around it. Rogers set a world speed record of 1,525.96
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