XWB
in service - 11 years
Posts: 16,115
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Post by XWB on Jun 5, 2017 20:16:51 GMT 1
It was mentioned that the bearing fix is retrofittable.
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s543
in service - 2 years
Posts: 3,959 
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Post by s543 on Jun 5, 2017 22:11:34 GMT 1
What is more, the type of changes they just announced may well be retrofittable Where do you read this? A new core (HP compressor, combustor and HP turbine) with higher pressure and temperature based on the use of new materials does not sound like a retrofit. Big retrofit - but still it could be .... it is far away - they say 2020 so.... as always "we will see"  |
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jun 6, 2017 2:13:19 GMT 1
What is more, the type of changes they just announced may well be retrofittable Where do you read this? A new core (HP compressor, combustor and HP turbine) with higher pressure and temperature based on the use of new materials does not sound like a retrofit. Mr Leduc did not say P&W intends to design a new core, only that there would be some 'technology injections' into the present core to increase its efficience. "We believe there is five to seven percent more improvement by the mid-2020s… if we step up the core technology injection,” to produce a PW1000G core as advanced as that of the Leap programme". The meaning is clear : P&W intends to introduce CMC (ceramic matrix composites) as CFM did in the LEAP engine. This kind of improvement should be retrofittable. |
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cck
Final Assembly Line stage 1
Posts: 228
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Post by cck on Jun 6, 2017 7:34:37 GMT 1
Where do you read this? A new core (HP compressor, combustor and HP turbine) with higher pressure and temperature based on the use of new materials does not sound like a retrofit. Mr Leduc did not say P&W intends to design a new core, only that there would be some 'technology injections' into the present core to increase its efficience. "We believe there is five to seven percent more improvement by the mid-2020s… if we step up the core technology injection,” to produce a PW1000G core as advanced as that of the Leap programme". The meaning is clear : P&W intends to introduce CMC (ceramic matrix composites) as CFM did in the LEAP engine. This kind of improvement should be retrofittable. PW could utilize the technology CFM using but CFM couldn't change the LEAP engine architecture to GTF, that would give PW big advantages. |
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pi88re
Preparation for Convoy
Posts: 32
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Post by pi88re on Jun 6, 2017 9:02:10 GMT 1
And what about "retrofit" price ?
As long as some of them might be improvement I would understand that they are not free but bearing & combustor issues should be at no cost for the customer.
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jun 6, 2017 9:11:25 GMT 1
And what about "retrofit" price ? As long as some of them might be improvement I would understand that they are not free but bearing & combustor issues should be at no cost for the customer. Of course, the customer hasn't to pay for simple 'fixes', P&W is covering the costs. Later improvement packages will come at a price. |
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sciing
in service - 1 year
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Post by sciing on Jun 6, 2017 21:09:33 GMT 1
This kind of improvement should be retrofittable. Why are they going introduce it? It not just for fun or because it's the "better" material, they have to do it to allow/achieve higher temperatures and pressures to win efficiency. This means more stress for the core and the whole engine. I do not believe that the core/engine is over engineered and has more margins than needed today. So I think they have to redesign the whole core/engine and I do not think it is retrofitable, just my opinion. I don't know but don't they need more compressor/turbine stages if working at higher pressures? |
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pi88re
Preparation for Convoy
Posts: 32
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Post by pi88re on Jun 7, 2017 7:50:34 GMT 1
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jun 7, 2017 10:23:27 GMT 1
That's a 2 % difference. Is it a major issue ?
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pi88re
Preparation for Convoy
Posts: 32
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Post by pi88re on Jun 7, 2017 12:34:23 GMT 1
That's a 2 % difference. Is it a major issue ? That's even "only" 1.7% when converted into Kelvin!   Seriously, fact is that GTF is already hotter than LEAP, that's all. |
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