Questions tagged [jet-engine]
Engines which propel aircraft via "jet propulsion", i.e. by expelling high-velocity gasses (usually primarily air) through propelling nozzles.
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What is the produced Drag by a Jet Engine on an airliner?
Are there certain estimation formulas to calculate the drag created by a Jet engine mounted above the fuselage, as shown?
Digital DATCOM seems not to estimate it.
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Why hasn't there been an alternative to jet engines yet?
Why do airlines and military jet aircraft still use jet engines after 85 years of the introduction of this technology?
Why hasn't there been a viable alternative to jet engines yet, even though this ...
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Why don't airliners use engines one behind another?
Why do airliners use the engines the way they currently do and not one behind another?? Would it not lead to better thrust and in case any one of the 2 engines placed together has to fail, the 2nd one ...
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What does the suffix "A“ mean on specific PW1100G(A) engines?
Some time ago I tried to find out what the difference between a PW1100G and a PW1100GA exactly is. I am asking this question here because there seems to be no information online that could be useful ...
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Name of this part of jet engine inlet
I can't find any name of it. I see it on some gas turbines but not all of them.
Edit: Found them, they are called struts.
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I'm having a hard time conceptualizing this statement from "The Jet Engine" by Rolls-Royce
This is taken from section 21 of Chapter 3, Compressors that discusses axial flow compressors in turbine jet engines.
The more the pressure ratio of a compressor is increased the more
difficult it ...
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Lightoff to speak about an engine start
Why is the term lightoff (or light-off) used to describe the moment an engine ignite/is started ? I'm wondering why the suffix 'off' is used in an 'ON' sense (start, ignition) ? Is there a ...
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Why cant all planes use the best engines like the GeNX or the Trent XWB?
Why do airline manufacturers not prefer using the best engines(max thrust: weight ratio and best efficiency) for their airplanes? Doesn't this just not lead to lower sales and losses for the company?
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How do tubojets compare to afterburning turbofans in terms of efficiency?
Turbojets used to be more common in the 40's and 50's but once jet engine design matured they pretty much went extinct in favor of the more efficient turbofan. I know one advantage of the turbojets is ...
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NASA's and Boeing truss-braced wing fuel savings breakdown
According to its Administrator Bill Nelson, NASA is working on a project with Boeing that will reduce single-isle aircraft fuel consumption by 30%. He described it as a higher and thinner wing and ...
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Is it a good idea to increase exhaust duct length?
I am a big newbie in aviation but still, I have a question:
Let's assume a civil aircraft (Boeing 737 or Airbus 320), flying with those impossible real life hypothesis:
the exact SAME turbofan are ...
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How did the engines on the ME-262 work? [duplicate]
I have been looking into the ME-262 jet engines recently but cannot quite understand how they worked and was wondering if anyone could explain it to me in a simplified way.
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Can jet engines stay running without electrical power?
A piston-engine aircraft will continue to run as long as its magnetos still work, even if there is zero electricity in the battery and the alternator is broken, because magnetos are independent of the ...
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Is the clamshell on the AN-72 what causes the Coanda effect?
The AN-72 uses the Coandă effect to improve lift and give it better STOL features.
In this image of an AN-72 (presumably on a takeoff roll) one can see a clam-shell bucket open at the top of the ...
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Why aren't all fighter jets' engine intakes on top instead of forward?
Reading the question and answer to How does the Yak-130 fly with blocked engine inlets, I am now wondering why it - or any fighter jet - has forward engine intakes at all? The top and accepted answer ...
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