A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by jet engines (jet propulsion).
Whereas the engines in propeller-powered aircraft generally achieve their maximum efficiency at much lower speeds and altitudes, jet engines and aircraft achieve maximum efficiency (see specific impulse) at speeds close to or even well above the speed of sound. Jet aircraft generally cruise at faster than about M 0.8 (609 mph, 981 km/h or 273 m/s) at altitudes around 10,000–15,000 metres (33,000–49,000 ft) or more.
Frank Whittle, an English inventor and RAF officer, developed the concept of the jet engine in 1928,Hans von Ohain in Germany, a decade later developed the concept independently at the end of the 1930s. He wrote in February 1936 to Ernst Heinkel, telling him of the design and its possibilities. However, it can be argued that the English engineer A. A. Griffith, who published a paper in July 1926 on compressors and turbines, also deserves credit.
Dubai (/duːˈbaɪ/ doo-BY; Arabic: دبي Dubayy, Gulf pronunciation: [dʊˈbɑj]) is the most populous city in the United Arab Emirates (UAE). It is located on the southeast coast of the Persian Gulf and is one of the seven emirates that make up the country. Abu Dhabi and Dubai are the only two emirates to have veto power over critical matters of national importance in the country's legislature. The city of Dubai is located on the emirate's northern coastline and heads up the Dubai-Sharjah-Ajman metropolitan area. Dubai is to host World Expo 2020.
Dubai has emerged as a global city and business hub of the Middle East. It is also a major transport hub for passengers and cargo. By the 1960s Dubai's economy was based on revenues from trade and, to a smaller extent, oil exploration concessions, but oil was not discovered until 1966. Oil revenue first started to flow in 1969. Dubai's oil revenue helped accelerate the early development of the city, but its reserves are limited and production levels are low: today, less than 5% of the emirate's revenue comes from oil. The emirate's Western-style model of business drives its economy with the main revenues now coming from tourism, aviation, real estate, and financial services. Dubai has recently attracted world attention through many innovative large construction projects and sports events. The city has become iconic for its skyscrapers and high-rise buildings, in particular the world's tallest building, the Burj Khalifa. Dubai has been criticised for human rights violations concerning the city's largely South Asian workforce. Dubai's property market experienced a major deterioration in 2008–09 following the financial crisis of 2007–08, but the emirate's economy has made a return to growth, with a projected 2015 budget surplus.
Dubai is a major city and one of the seven emirates of the United Arab Emirates.
Dubai may also refer to:
Dara Daivari (born April 30, 1984) is an American professional wrestler currently performing on the independent circuit as Shawn Daivari. He is best known for his work with World Wrestling Entertainment (WWE) as simply Daivari and with Total Nonstop Action Wrestling (TNA) as Sheik Abdul Bashir.
Daivari grew up admiring Mick Foley and Bret Hart. His childhood hero was Shawn Michaels. He participated in his first professional wrestling match at age 15. He started his career in the upper midwest independent scene. He is known for representing Iran for international title matches
On October 19, 1998, Daivari appeared on Nitro as a fan being interviewed by Mike Tenay.
He appeared on the February 26, 2003 episode of Explosion and wrestled a tag team match against Mike Sanders and Glenn Gilberti with Ken Anderson. He also appeared on the October 5, 2003 episode of Sunday Night Heat as Shawn Daivari, losing his match against Tommy Dreamer. He also made four appearances for independent promotion Ring of Honor (ROH) between April and July 2004.