Jet aircraft

Boeing 747SP of the Bahrain Royal FlightLockheed Martin F-22 Raptor

Heinkel He 178, in August 1939 the world's first aircraft to fly purely on turbojet power

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.

单词	Jetplanes
释义	Jetplanes 英语百科 Jet aircraft 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.
随便看	radiometric calorimetry radiometric conversion chart radiometric correction radiometric curve radiometric data Radiometric dating radiometric detector radiometric determination radiometric emission radiometric end point radiometric error radiometric exploration radiometric force radiometric gage radiometric gauge radiometric inspection radiometric logging radiometric magnitude radiometric manipulation radiometric manometer radiometric map radiometric mapper radiometric measurement radiometric, measurement radiometric method

Jetplanes

Jet aircraft