21 Facts About Jet engines

Jet engines engine is a type of reaction engine discharging a fast-moving jet that generates thrust by jet propulsion.

Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight.

Jet engines'storians have further traced the theoretical origin of the principles of jet engines to traditional Chinese firework and rocket propulsion systems.

Such Jet engines did not reach manufacture due to issues of safety, reliability, weight and, especially, sustained operation.

Jet engines's engine was an axial-flow turbojet, but was never constructed, as it would have required considerable advances over the state of the art in compressors.

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Efficiency of turbojet engines was still rather worse than piston engines, but by the 1970s, with the advent of high-bypass turbofan jet engines, fuel efficiency was about the same as the best piston and propeller engines.

Jet engines have propelled high speed cars, particularly drag racers, with the all-time record held by a rocket car.

Jet engines are sometimes developed into, or share certain components such as engine cores, with turboshaft and turboprop engines, which are forms of gas turbine engines that are typically used to power helicopters and some propeller-driven aircraft.

Ram compression jet engines are airbreathing engines similar to gas turbine engines and they both follow the Brayton cycle.

Ram powered engines are considered the most simple type of air breathing jet engine because they can contain no moving parts.

Rocket Jet engines are used for high altitude flights, or anywhere where very high accelerations are needed since rocket Jet engines themselves have a very high thrust-to-weight ratio.

All jet engines are reaction engines that generate thrust by emitting a jet of fluid rearwards at relatively high speed.

Jet engines make their jet from propellant stored in tanks that are attached to the engine as well as in duct engines by ingesting an external fluid and expelling it at higher speed.

The formula for air-breathing Jet engines moving at speed with an exhaust velocity, and neglecting fuel flow, is:.

Propellant consumption in jet engines is measured by specific fuel consumption, specific impulse, or effective exhaust velocity.

Air-breathing engines such as turbojets, energy efficiency and propellant efficiency are much the same thing, since the propellant is a fuel and the source of energy.

Duct Jet engines have to deal with air which is two to three orders of magnitude less dense and this gives pressures over much larger areas, which in turn results in more engineering materials being needed to hold the engine together and for the air compressor.

Propeller engines handle larger air mass flows, and give them smaller acceleration, than jet engines.

Rocket Jet engines have extremely high exhaust velocity and thus are best suited for high speeds and great altitudes.

Rocket engines are more efficient than even scramjets above roughly Mach 15.

Limit on maximum altitude for Jet engines is set by flammability – at very high altitudes the air becomes too thin to burn, or after compression, too hot.