JoeCanuck From Canada, joined Dec 2005, 6003 posts, RR: 32 Posted (3 years 9 months 3 weeks 4 days 11 hours ago) and read 6103 times:
With the Trent XWB about to begin flight tests, I thought I'd post a question I've wondered about for some time. I have read here that the XWB engine is more advanced and more efficient than the T-1000 engine.
In what ways is it more advanced?
How much more efficient is it?
Which, if any, advances unique to the XWB are possible to be adapted to the T-1000?
Stitch From United States of America, joined Jul 2005, 32710 posts, RR: 85
Reply 1, posted (3 years 9 months 3 weeks 4 days 4 hours ago) and read 6055 times:
The biggest change is the Trent XWB is the first in the Trent family with two Intermediate Pressure Turbines, which improves pressures and the engine's overall thermodynamic efficiency. The benefit of this is lower fuel burn at cruise. The Trent XWB is also introducing BLISKs and a new single annular combustor design.
I've already looked at the RR site but I can't find what technology in the XWB can be transferred to the T-1000. Except for blisks, (which I imagine could go into the t-1000...but no mention that I could find if or when they actually would), I couldn't figure out what technology is transferable.
Another question; if the XWB proves significantly more efficient than the T-1000 of a similar thrust range, might it be feasible to put that engine on the 787?
tdscanuck From Canada, joined Jan 2006, 12710 posts, RR: 81
Reply 4, posted (3 years 9 months 3 weeks 3 days 11 hours ago) and read 5818 times:
Quoting JoeCanuck (Reply 3): Another question; if the XWB proves significantly more efficient than the T-1000 of a similar thrust range, might it be feasible to put that engine on the 787?
It's technically possible, probably, but economically a dead end. You're talking about an entirely new flight test program, new strut, new nacelle. *Way* cheaper to just roll those design elements that make the XWB better into the 1000.
Baroque From Australia, joined Apr 2006, 15380 posts, RR: 59
Reply 5, posted (3 years 9 months 3 weeks 3 days 7 hours ago) and read 5746 times:
Quoting tdscanuck (Reply 4): *Way* cheaper to just roll those design elements that make the XWB better into the 1000.
Which is what RR have said they will do both for the T1000 and the T900. But neither will get the extra IPT.
Some of the more significant gains seem to come in the compressor side of the engine and those gains should be migratable you would think. But it appears that part of the XWB may actually be simpler as well as better than the earlier engines. How much simplicity can be back migrated could be an interesting question. The XWB will also have better thermal coatings IIRC.