philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jan 25, 2018 13:18:21 GMT 1
The above information confirms that P&W is now ramping up according to plan. I hope they catch back on early more ambitious plans that were derailed by technical hiccups.
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jan 26, 2018 14:09:40 GMT 1
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mjoelnir
in service - 2 years
Posts: 4,089
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Post by mjoelnir on Jan 26, 2018 14:32:10 GMT 1
So LEAP deliveries are delayed, something I have been talking about for a while regarding the flow of delivered frames. There also has not been a lot of talk about the technical problems regarding the LEAP 1A, but technical problems are acknowledge in this article. |
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XWB
in service - 11 years
Posts: 16,115
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Post by XWB on Jan 26, 2018 14:41:36 GMT 1
That was pretty obvious, inn't? Otherwise we wouldn't be seeing engineless aircraft emerging from final assembly all the time.
One of the issues would be the open compressor, which was debated some year ago.
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mjoelnir
in service - 2 years
Posts: 4,089
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Post by mjoelnir on Jan 27, 2018 2:23:52 GMT 1
There also has not been a lot of talk about the technical problems regarding the LEAP 1A, but technical problems are acknowledge in this article. One of the issues would be the open compressor, which was debated some year ago.[/quote] But never officially acknowledged. |
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Post by ca350 on Feb 6, 2018 7:35:41 GMT 1
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Post by marlibu on Feb 11, 2018 15:13:21 GMT 1
hi guys, can anyone explain what determines the operating temperature of the engine? I ask this as a result of the LEAP Engine having a higher operating temp than the GTF.
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Feb 11, 2018 18:50:41 GMT 1
hi guys, can anyone explain what determines the operating temperature of the engine? I ask this as a result of the LEAP Engine having a higher operating temp than the GTF. I'll try to contribute to the answer. - A higher rate of compression induces both increased engine efficiency and a higher operating temperature. - Operating temperature is limited by the materials 'hot' engine parts are made of. - CMC (ceramic matrix composites) allow a higher operating temperature than metals. The downside might be higher long-term maintenance costs. - While all major engine manufacturers have invested in CMC technology, GE has been a leader in their introduction into civilian engines (GE is making the 'hot' parts of CFM engines), whereas P&W is using them in military engines, less so in civilian engines. To match the performance of the P&W geared engine with a classical design, CFM had to to increase the rate of compression, notably through the use of (some) parts made out of CMC. Many believe the metal-made GTF will eventually perform better than the LEAP because P&W can progressively introduce more and more CMC parts through PIPs, while the LEAP performance seems to be already maxed out. |
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pi88re
Preparation for Convoy
Posts: 32 
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Post by pi88re on Feb 11, 2018 19:04:14 GMT 1
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Post by kevin5345179 on Feb 12, 2018 19:45:57 GMT 1
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