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If Boeing Decide To Do 787-10 Does That Mean?  
User currently offlineAirCanada014 From Canada, joined Oct 2005, 1513 posts, RR: 0
Posted (8 years 1 month 1 week 5 days 19 hours ago) and read 6491 times:

Hello all


I don't think this post ever been discussed. If Boeing decides to do the 787-10 would that mean Boeing will have to ask GE to make a new powerful engine of greater than 75000lb thrust? We all know Airbus wants to make a new A370 and needs a powerful engine than the one GEnx is offering from 55,000lbs to 75,000lbs of thrust. Airbus wants at least 95,000lb thrust from GE so customers have two choices of engine makers. GE doesn't want to make new powerful engine for A370 because of Boeing 777-200ER and 777-300 being the sole supplier of GE.

9 replies: All unread, jump to last
 
User currently offlineDAYflyer From United States of America, joined Sep 2004, 3807 posts, RR: 3
Reply 1, posted (8 years 1 month 1 week 5 days 19 hours ago) and read 6478 times:

The 787-10 may require slightly more thrust, but not a new engine entirely. If they take the size any bigger than that currently speculated, they may be forced to look at another larger GENx engine.

I have always wondered if it were possible to de-rate the GE-90 to the thrust class needed for a bigger -10 without a huge fuel or efficiency penalty.

[Edited 2006-07-12 21:47:51]


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User currently offline1337Delta764 From United States of America, joined Oct 2005, 6474 posts, RR: 2
Reply 2, posted (8 years 1 month 1 week 5 days 19 hours ago) and read 6465 times:

Boeing and GE have lately had a close relationship, and IMO GE is more likely to make an engine for the 787-10 than the A370.


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User currently onlineNYC777 From United States of America, joined Jun 2004, 5747 posts, RR: 47
Reply 3, posted (8 years 1 month 1 week 5 days 19 hours ago) and read 6430 times:

I don't think it would make sense to put a de-rated GE90 on the 787-10 mainly beccause the 787 is designed to be bleedless and the GE90 a bleeded engine. They would have to substantially rework the design.

It would make more sense to go with a larger GENX (do to the 787 what the GE90-115 did for the 777LR).



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User currently offlineTrex8 From United States of America, joined Nov 2002, 4745 posts, RR: 14
Reply 4, posted (8 years 1 month 1 week 5 days 13 hours ago) and read 6162 times:
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at this time Boeing are saying the 787-10 will not have a higher TO weight than a -9 so whatever works for the -9 will be fine, which will likely be something in the thrust size of whatever the "original" A350-9 needs.

User currently offlineSunriseValley From Canada, joined Jul 2004, 4941 posts, RR: 5
Reply 5, posted (8 years 1 month 1 week 5 days 12 hours ago) and read 6065 times:

Widebodyphotog in his table http://theaviationspecialist.com/787_family.gif
shows a Trent 1075-77 with a thrust of 75300lb. He shows a GEnX-75B1 on the 787-9 at about the same thrust.


User currently offlinePolymerPlane From United States of America, joined May 2006, 991 posts, RR: 3
Reply 6, posted (8 years 1 month 1 week 5 days 11 hours ago) and read 5914 times:

I would think that boeing would wait a liitle bit until the GEnX and trent 1000 are mature enough, and both or one of the companies is willing to develop a more efficient more powerful engine, and launch 787-10ER.

I think both GE and RR will be very cautious to launch too many variants at one time, before actually recouping the development costs.

Cheers,
PP



One day there will be 100% polymer plane
User currently offlineGeo772 From United Kingdom, joined Jul 2004, 519 posts, RR: 0
Reply 7, posted (8 years 1 month 1 week 4 days 22 hours ago) and read 5591 times:

There is no way that the GE90 would ever be used for the 787. Firstly it is just too big and heavy to make any sense. Incidentally it is already available at a 75,000lb thrust rating on the A market 772. However it is not until you get over 100,000lb that it starts to become a great engine.

The GEnx is likely to have a lot of GE90 derived technology within it, but in a package better suited to the 787.



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User currently offlineDAYflyer From United States of America, joined Sep 2004, 3807 posts, RR: 3
Reply 8, posted (8 years 1 month 1 week 4 days 21 hours ago) and read 5523 times:

Quoting NYC777 (Reply 3):
I don't think it would make sense to put a de-rated GE90 on the 787-10 mainly beccause the 787 is designed to be bleedless and the GE90 a bleeded engine. They would have to substantially rework the design.

Good point...forgot about the bleedless issue, just thinking about the thrust.

Quoting Geo772 (Reply 7):
Firstly it is just too big and heavy to make any sense. Incidentally it is already available at a 75,000lb thrust rating on the A market 772

Thanls to you both for these concise answers. I appreciate it very much.



One Nation Under God
User currently offlinePavlin From , joined Dec 1969, posts, RR:
Reply 9, posted (8 years 1 month 1 week 4 days 21 hours ago) and read 5494 times:

Quoting NYC777 (Reply 3):
It would make more sense to go with a larger GENX

Isn't the GENX designed to be even more powerful in the future


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