Coordinates: 24°N 54°E / 24°N 54°E / 24; 54
The United Arab Emirates i/juːˌnaɪtᵻd ˌærəb ˈɛmɪrᵻts/ (Arabic: دولة الإمارات العربية المتحدة Dawlat al-Imārāt al-‘Arabīyah al-Muttaḥidah), sometimes simply called the Emirates or the UAE, is a country located in the southeast end of the Arabian Peninsula on the Persian Gulf, bordering Oman to the east and Saudi Arabia to the south, as well as sharing sea borders with Qatar and Iran. In 2013, the UAE's total population was 9.2 million, of which 1.4 million are Emirati citizens and 7.8 million are expatriates.
Established in December 1971, the country is a federation of seven emirates. The constituent emirates are Abu Dhabi (which serves as the capital), Ajman, Dubai, Fujairah, Ras al-Khaimah, Sharjah, and Umm al-Quwain. Each emirate is governed by an absolute monarch; together, they jointly form the Federal Supreme Council. One of the monarchs is selected as the President of the United Arab Emirates. Islam is the official religion of the UAE, and Arabic is the official language, although English is widely used.
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.