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.
Airplanes. Believe it or not, some airplanes use parachutes as well. For some, the function is a lot like a drag racer. This is ideal for areas with limited runways, such as an aircraft carrier's deck. There also are some aircraft that use a parachute recovery system to protect them from crashes.pace Travel. Parachutes don't have much use in a vacuum because they require air to actually function; yet, the Apollo capsule was equipped with one. NASA uses parachutes for a similar reason that some airplanes do, for recovery.