5 ms·
I am not at all an expert in this field, but is "jet" the right word? I thought that required combusting fuel and using the flaming exhaust to propel something
by w0mbat 5y ago
I am not at all an expert in this field, but is "jet" the right word?
I thought that required combusting fuel and using the flaming exhaust to propel something. This is propellors in tubes.
Also this vehicle is about a third of the speed of what most people think of as a "jet plane".
- nickff 5y ago'Jet' has been used to describe many different types of propulsion system. The first jets were what you'd call rocket engines. Then we got 'turbojets' (mostly on aircraft), followed some time later by 'turbofans'. Most confusingly, ducted propellers on submarines are called 'pump-jets'. I would agree with you that this seems better-described as a ducted fan (which the author also says), but this use of 'jet' is not beyond the pale.
- divbzero 5y agoJet propulsion involves ejecting a jet of fluid [1] and does not require combustion of that fluid. [1]: https://en.wikipedia.org/wiki/Jet_propulsion https://en.wikipedia.org/wiki/Jet_propulsion
- Karliss 5y agoThere is also waterjet and jet stream. Not uncommon dictionary of jet is narrow,forceful stream of fluid or the nozzle producing it. Taking that into account difference between jet and propeller in tube is matter of speed and compression. It's just that fuel combustion is one the most practical energy sources including for producing jets of gas.