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Results tagged with jet-engine
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user 9716
Engines which propel aircraft via "jet propulsion", i.e. by expelling high-velocity gasses (usually primarily air) through propelling nozzles.
4
votes
2
answers
704
views
When were the first jet engines used?
I read a book about WW2 1 and saw a couple of planes with a giant jet engine on top of them, e.g. the Heinkel He 162 Salamander.
I realize jet engines had to have been invented before WW2 for that ki …
- 9,399
1
vote
2
answers
2k
views
How does ignited gas spin the turbine?
For the N1 fan and N2 compressor to move, the turbine needs to spin in an airliners engine. How does energy from the ignited gas spin this turbine? Do the blades on the turbine generate lift just like …
- 9,399
15
votes
3
answers
5k
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Why doesn't GE replace all 4 engines for on their flying test bed instead of just 1?
GE (General Electric) flies Boeing 747s equipped with new engines that are being tested. Why can't they equip the test airplane with all 4 of the new engines? Wouldn't the thrust be imbalanced by repl …
- 9,399
-5
votes
2
answers
943
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If you removed the compressors in an airlines engine would it have more thrust? [closed]
I was reading something about jet engines and it stated that the exhaust comes out of the exhaust nozzle at about 1,300mph, and it also said that the compressors help reduce the speed of the air flowi …
- 9,399
5
votes
2
answers
2k
views
What is the thing in the middle of the turbofan?
I have been understanding more about engines lately, but I can't figure out what the section in the middle of a turbofan is for:
What benefit does this part provide to rotating the air? Is it some …
- 9,399
-3
votes
2
answers
7k
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How does a boeing 707 have 4 engines instead of 2? [duplicate]
I was reading a article Link It stated that lower bypass ratio jet engines have higher thrust than high bypass ratio engines, but the boeing 707 has 4 of these low bypass ratio engines and only travel …
- 9,399
1
vote
0
answers
148
views
If you replaced jetfuel with hydrogen could the aircraft engine work on hydrogen? [duplicate]
I know that hydrogen has a reaction with oxygen like with jet fuel, but could the engine run on hydrogen.
- 9,399
9
votes
1
answer
7k
views
How does a supersonic jet engine differ from a subsonic jet engine? [duplicate]
All jet engines have the same method of air flowing into the engine, which is compressed and ignited.
What can engine designers do to make an engine design create more thrust? For example, what is d …
- 9,399
1
vote
5
answers
15k
views
Can an engine on a Boeing 737 fly just using compressed air instead of jet fuel? [duplicate]
I was just curious because the air is very compressed in the engine and some things do run on compressed air. And what if the engine was powered all by electricity?
- 9,399