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13 votes
Accepted

Why the combustion chambers of a turbine engine aren't used to spin the compressor like a firework wheel?

https://en.m.wikipedia.org/wiki/Tip_jet The link describes the nearest (imho) working application of your idea in aviation. While it generally works, it goes against important engineering tendencies ...
fraxinus's user avatar
  • 1,543
7 votes

Why the combustion chambers of a turbine engine aren't used to spin the compressor like a firework wheel?

What you are proposing would certainly be capable of powering a compressor section, but don’t forget that the primary purpose of a jet engine is to propel an aircraft forward by producing thrust along ...
Michael Hall's user avatar
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4 votes

Why the combustion chambers of a turbine engine aren't used to spin the compressor like a firework wheel?

The closest thing I found to this was this 3D animation of a hypothetical "turbineless jet engine", but no article/research which explored the practicality/efficiency of such an engine. ...
sophit's user avatar
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4 votes

Why don't airliners use engines one behind another?

If one looks at the interior of a jet engine we do see many compressor and turbine blades one behind another. With jets, it is most efficient to have one place where incoming air is heated to drive ...
Robert DiGiovanni's user avatar
4 votes

Why don't airliners use engines one behind another?

It wouldn't increase thrust. Thrust means the gases coming out the back of the engine are moving faster than the gases coming in the front. The bigger the speed difference, the more the thrust. So if ...
Camille Goudeseune's user avatar
4 votes

Why the combustion chambers of a turbine engine aren't used to spin the compressor like a firework wheel?

I believe you're suggesting having each combustor attached directly to the turbine shaft and using the hot gas output of each combustor to directly drive the main shaft instead of using the combined ...
FreeMan's user avatar
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4 votes
Accepted

Why cant all planes use the best engines like the GeNX or the Trent XWB?

Why doesn't Airbus certify airplanes with the best engine in the market? For example, the A330 had a General Electric CF6-80E1 engine which was very small for it Because when the A330 was first ...
sophit's user avatar
  • 13k
3 votes

Why cant all planes use the best engines like the GeNX or the Trent XWB?

All commercial aircraft use the best engine technology available at the time when they were being designed. Once the design is settled (after years of work!) an engine change would reset the whole ...
niels nielsen's user avatar
3 votes

Why don't airliners use engines one behind another?

This is an easy physics. We don't need to think about engineering. Jet engines work by compressing air, adding heat through combustion, and then using the hot, expanding gases to generate thrust. ...
Creative Mania's user avatar
2 votes

Why don't airliners use engines one behind another?

This question is a bit like asking why car designers don't replace V8 engines with a pair of daisy-chained 4 cylinder engines. Whatever two separate engines connected inline can do, will almost ...
Lawnmower Man's user avatar
2 votes

Why cant all planes use the best engines like the GeNX or the Trent XWB?

Define "best". Best for what? If there were a single universal "best", nothing else would exist. As already said, aircraft use engines that are available when the type gets ...
jwenting's user avatar
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1 vote
Accepted

Why don't airliners use engines one behind another?

Most airliners already have 2 engines, and can operate on one just fine. Your suggestion would be very costly, adding massive weight and complexity, and burning way more fuel for additional engines ...
Michael Hall's user avatar
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1 vote

What does the suffix "A“ mean on specific PW1100G(A) engines?

It probably refers to "Advantage" series, PW1100G-JM Advantage. About 1% more thrust and uses a little less fuel. Certified in 2023 and entered service in 2024. https://prd-sc102-cdn.rtx.com/...
Jim's user avatar
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