Turbojets are the oldest kind of general purpose jet engines. Two engineers, Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently during the late 1930s, although credit of the first turbojet is given to Whittle.
Turbojets consist of an air inlet, an air compressor, a combustion chamber, a gas turbine (that drives the air compressor) and a nozzle. The air is compressed into the chamber, heated and expanded by the fuel combustion and then allowed to expand out through the turbine into the nozzle where it is accelerated to high speed to provide propulsion.
Turbojets are quite inefficient (if flown below about Mach 2) and very noisy. Most modern aircraft use turbofans instead for economic reasons.
TurboJET (Chinese: 噴射飛航) is the brand name for the operations of the Hong Kong-based Shun Tak-China Travel Ship Management Limited (信德中旅船務管理有限公司), which was established from the joint venture between Shun Tak Holdings Limited (信德集團有限公司) and China Travel International Investment Hong Kong Limited in July 1999. It operates hydrofoil ferry services in southern China.
