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Is there any modern airliner plane that still uses jets? IIRC all modern passenger plane engines are turbofan engines. Turboprops win at slower speed, while tur

Is there any modern airliner plane that still uses jets? IIRC all modern passenger plane engines are turbofan engines. Turboprops win at slower speed, while turbofans excel in the fast-but-still-subsonic range.

catalogia 6y ago
There aren't any modern planes still using turbojets. I think the Concorde might have been the last (ceased operation in 2003.) Combat jets often have very low-bypass ratio turbofan engines though. A true turbojet has a 0 bypass-ratio; a lot of turbofan fighter jets have bypass-ratios under 1, while the engines on a 787 have a bypass-ratio of 10. https://en.wikipedia.org/wiki/Bypass_ratio#Engine_bypass_ratios https://en.wikipedia.org/wiki/Bypass_ratio#Engine_bypass_rat...
falcolas 6y ago
I should clarify, when I'm saying "jet", I do mean turbofans. And turbofans still include a jet engine, but the output turns a turbine which rotates the fans.
- catalogia 6y ago
  Turbojets, turbofans, and turboprops all use gas turbines. The "jet" in this context refers to the action of the exhaust, not the mechanism creating the exhaust (which is the gas turbine.) Turbojets and Turbofans both create jets of hot exhaust gas to produce thrust. Turbojets produce thrust exclusively with this jet of exhaust gas, while turbofans produce some [often most] of their thrust by using some of the turbine's output to turn a ducted fan. Turboprops don't produce any meaningful jet of exhaust gas, instead using the output of the gas turbine to turn a propeller. Related to turboprops are turboshaft engines, which turn a power transmission shaft instead of a propeller directly. In some cases, like the V-22 Osprey, the line between a turboprop and a turboshaft is blurred. But some clear examples of turboshaft engines are in modern helicopters and Abrams tanks. There are some kinds of jet engines that don't use turbines. Ramjets and scramjets don't use turbines, but have 'jet' in the name because they produce their thrust using a jet of hot exhaust gas. Rocket engines produce jets of hot exhaust gas, but aren't called jet engines because.. reasons. > jet: A collimated stream, spurt or flow of liquid or gas from a pressurized container, an engine, etc. (Note that this makes turboprop engines not jet engines, but turbojet and turboprop engines are both gas turbine engines.)

catalogia 6y ago

There aren't any modern planes still using turbojets. I think the Concorde might have been the last (ceased operation in 2003.) Combat jets often have very low-bypass ratio turbofan engines though. A true turbojet has a 0 bypass-ratio; a lot of turbofan fighter jets have bypass-ratios under 1, while the engines on a 787 have a bypass-ratio of 10. https://en.wikipedia.org/wiki/Bypass_ratio#Engine_bypass_ratios https://en.wikipedia.org/wiki/Bypass_ratio#Engine_bypass_rat...

falcolas 6y ago

I should clarify, when I'm saying "jet", I do mean turbofans. And turbofans still include a jet engine, but the output turns a turbine which rotates the fans.

catalogia 6y ago
Turbojets, turbofans, and turboprops all use gas turbines. The "jet" in this context refers to the action of the exhaust, not the mechanism creating the exhaust (which is the gas turbine.) Turbojets and Turbofans both create jets of hot exhaust gas to produce thrust. Turbojets produce thrust exclusively with this jet of exhaust gas, while turbofans produce some [often most] of their thrust by using some of the turbine's output to turn a ducted fan. Turboprops don't produce any meaningful jet of exhaust gas, instead using the output of the gas turbine to turn a propeller. Related to turboprops are turboshaft engines, which turn a power transmission shaft instead of a propeller directly. In some cases, like the V-22 Osprey, the line between a turboprop and a turboshaft is blurred. But some clear examples of turboshaft engines are in modern helicopters and Abrams tanks. There are some kinds of jet engines that don't use turbines. Ramjets and scramjets don't use turbines, but have 'jet' in the name because they produce their thrust using a jet of hot exhaust gas. Rocket engines produce jets of hot exhaust gas, but aren't called jet engines because.. reasons. > jet: A collimated stream, spurt or flow of liquid or gas from a pressurized container, an engine, etc. (Note that this makes turboprop engines not jet engines, but turbojet and turboprop engines are both gas turbine engines.)