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.
Scrub planes. Scrub planes are used for the fast removal of stock (reducing the size of boards, or pieces of wood). They are relatively short and narrow and usually have thick blades to avoid flexing under pressure. Some woodworkers consider the scrub plane to be a kind of bench plane (see below). However, its design differs from bench planes in several ways and the deep, gouging cuts that it makes give it a reputation as an 'aggressive' tool, as opposed to the more graceful, rhythmic approach associated with bench planes.