Questions tagged [jet]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
-1
votes
2answers
32 views

Please explain engine thrust and aircraft weight

This is probably really easy for someone... But... My non-engineer head just cant seem to get an answer to this question in terms that are simple to digest. A new Boeing 777X has a max take off weight ...
-1
votes
2answers
38 views

Is it true that pre-jet air planes used to fly much lower? If so, why?

I watched a video on the Concorde the other day. In it, they talked about the history of airplanes, and how the jetplanes now started flying "above the weather", and that the propellar-...
1
vote
1answer
21 views

Do stators in axial flow compressors have airfoil geometry?

In axial flow compressors the role of a stator is to gradually change the direction of flow to exchange some of the kinetic energy of the flow into pressure. Therefore it stands to reason that they do ...
2
votes
1answer
26 views

What gives gas turbine/turbojet engines such high energy density?

What is the cause of turbojets'/gas turbines' high power to weight ratio compared to piston engines? They certainly use a generally less efficient thermodynamic cycle.
-1
votes
1answer
17 views

Effect of speed of turbo fan in bypass jet engine

Why do we keep speed of turbofan of turbofan jet engine, low. And what is the maximum thrust a turbofan jet engine., how much can thrust a turbofan jet engine produce with just compressed air.
1
vote
0answers
13 views

Basic dimension relationships in a valveless pulsejet engine

I'm willing to take my own shot at the construction of a blast supercharged valveless pulsejet, a holy grail among DIY jet enthusiasts. However, since my idea is not very compatible with the geometry ...
1
vote
1answer
33 views

Does air pressure difference of intake exhaust contribute to jet thrust?

I know momentum of the airflow inside jet engine generates thrust, but what about the pressure difference in front of and at the back of the engine? The air sucking intake at the front has lower than ...
2
votes
2answers
104 views

Efficiency of TurboJet engines with nozzles

As per Bryton Cycles, most of TurboJet engines' Thermodynamic efficiency should be around 40%. Rest of energy gets rejected as waste heat in exit gases of after the turbine. But if these hot gases ...