Wind-driven turbine vent. 1  Wind-driven roof vents will pull more air from the attic, but only when the wind is blowing. 2  Flat roof vents have no moving parts to break or squeak, but don't vent as much air as wind-driven vents.
An airplane or aeroplane (informally plane) is a powered, fixed-wing aircraft that is propelled forward by thrust from a jet engine or propeller. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research. Commercial aviation is a massive industry involving the flying of tens of thousands of passengers daily on airliners.
Boeing designs airplanes to resist corrosion through selection of the proper materials and finishes and the use of drainage, sealants, and corrosion inhibitors. These designs are based on knowledge of what causes corrosion and the types of corrosion that occur in airplane structure. In addition, following a corrosion control program is necessary throughout the service life of the airplane.