The Turks and Caicos Islands lie southeast of Mayaguana in the Bahamas island chain and north of the island of Hispaniola. Cockburn Town, the capital since 1766, is situated on Grand Turk Island about 1,042 kilometres (647mi) east-southeast of Miami, United States. The islands have a total land area of 430 square kilometres (170sqmi).
The first recorded European sighting of the islands now known as the Turks and Caicos occurred in 1512. In the subsequent centuries, the islands were claimed by several European powers with the British Empire eventually gaining control. For many years the islands were governed indirectly through Bermuda, the Bahamas, and Jamaica. When the Bahamas gained independence in 1973, the islands received their own governor and have remained a separate autonomous British Overseas Territory since. In August 2009, the United Kingdom suspended the Turks and Caicos Islands' self-government after allegations of ministerial corruption. Home rule was restored in the islands after the November 2012 elections.
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 (609mph, 981km/h or 273m/s) at altitudes around 10,000–15,000 metres (33,000–49,000ft) 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.