Air brake (aeronautics)
In aeronautics, air brakes or speedbrakes are a type of flight control surfaces used on an aircraft to increase drag or increase the angle of approach during landing. Air brakes differ from spoilers in that air brakes are designed to increase drag while making little change to lift, whereas spoilers reduce the lift-to-drag ratio and require a higher angle of attack to maintain lift, resulting in a higher stall speed.
The earliest known air brake was developed in 1931 and deployed on the wing support struts. Not long after, air brakes located on the bottom of the wing's trailing edge were developed and became the standard type of aircraft air brake for decades.
In 1936, Hans Jacobs developed self-operating dive brakes, on the upper and lower surface of each wing, for gliders.Most early gliders were equipped with spoilers on the wings in order to adjust their angle of descent during approach to landing. More modern gliders use airbrakes which may spoil lift as well as increase drag, dependent on where they are positioned.
Air brake (road vehicle)
An air brake or, more formally, a compressed air brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle. Air brakes are used in large heavy vehicles, particularly those having multiple trailers which must be linked into the brake system, such as trucks, buses, trailers, and semi-trailers in addition to their use in railroad trains. George Westinghouse first developed air brakes for use in railway service. He patented a safer air brake on March 5, 1872. Westinghouse made numerous alterations to improve his air pressured brake invention, which led to various forms of the automatic brake. In the early 20th century, after its advantages were proven in railway use, it was adopted by manufacturers of trucks and heavy road vehicles.
Design and function
Ali Khan
Ali Khan may refer to:
Ali Khan, Khyber Pakhtunkhwa
Ali Khan (Urdu: علی خان) is one of the 44 union councils of Haripur District in Khyber-Pakhtunkhwa province of Pakistan. It is located east of the district capital, Haripur, at 33°59'22N 72°58'7E.
References
Coordinates: 33°59′22″N 72°58′7″E / 33.98944°N 72.96861°E / 33.98944; 72.96861
Ali Khan (cricketer)
Ali Khan (born 1 August 1989) is a Pakistani first-class cricketer who played for Sialkot cricket team.
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External links
Ali (singer)
Cho Yong-Jin (Korean: 조용진), famously known as Ali (stylized as ALi), is a South Korean singer-songwriter famous for her work on Korean pop music in the early twenty-first century. Her stage name is a motif from Muhammad Ali. This is so that it can be engraved easily by the masses. Following her debut in 2009, she is primarily known for her strong vocals and her time as a contestant on the KBS program Immortal Songs 2.
Career
Following her debut in 2009, she had already gained fame for her appearances on music shows, most notably Immortal Songs 2 on KBS2. She also worked as a professor in applied musical arts at the Seoul Technical Arts College.
ALi released her first album SOULri in December 2011 which was strangely two years after her official debut. One released track, "Na Young", garnered immediate controversy as its lyrics referenced a case of sexual assault that had been a very public case in South Korea, with many detractors criticizing the song to be insensitive to its subject. ALi would later address this controversy by revealing that she herself was a survivor of sexual assault.
Podcasts:
