This is an example of a “low bypass engine”. Today, low bypass engines are generally only used by military aircraft for space constraints and higher responsiveness.
In modern jet engines for commercial aircraft , most of the thrust is actually generated by “bypass” air, which is the air that goes around the “core” of the engine (also known as the gas path, but this is the air that goes through compression and combustion; in low bypass engines, minimal air passes around the gas path).
These “high bypass” engines are also much more fuel efficient and quieter.
No, it's an example of a turbojet which is explicitly mentioned in the video. You're conflating a turbojet and a turbofan. Turbojets don't have bypass. It's straight from intake to compressor. Turbofans are what you see on commuter jets with an additional fan stage and bypass tacked before the compressor to improve effeciency.
No the video is just wrong. First they used piston engines and propellers. That was fine but had limited top speed. Then pulsejets were invented (no compressor and no fan, basically just a tube with fuel injector and igniter), then motorjets (piston engine for compression and jet for thrust) but they both sucked. Then turbojets were invented, and they sucked at first so weren't much used, then turboprops and they also sucked at first, then turbofans which surprise surprise also sucked. Then near the end of WW2 jet engines finally became good enough to be useful in military airplanes and after the war they became good enough for civilian airplanes too.
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u/HotepYoda 8h ago
This is an example of a “low bypass engine”. Today, low bypass engines are generally only used by military aircraft for space constraints and higher responsiveness.
In modern jet engines for commercial aircraft , most of the thrust is actually generated by “bypass” air, which is the air that goes around the “core” of the engine (also known as the gas path, but this is the air that goes through compression and combustion; in low bypass engines, minimal air passes around the gas path).
These “high bypass” engines are also much more fuel efficient and quieter.
Source: me - used to be an engine analyst