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Topic: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-08 11:41:37 and read 10543 times.

Not official but...

"United Technologies Corp. (UTX)’s Pratt & Whitney unit won an agreement to make engines for Embraer SA (EMBR3)’s revamped regional jets, beating incumbent supplier General Electric Co. (GE), three people with knowledge of the decision said.

Pratt & Whitney’s bid trumped proposals from GE and Rolls Royce Holdings Plc, said the people, who asked not to be identified because the details aren’t public yet. Embraer, the world’s fourth-largest planemaker, is due to announce its choice soon, one of the people said."

http://www.bloomberg.com/news/2013-0...ngines-on-newest-embraer-jets.html

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Revelation
Posted 2013-01-08 11:44:19 and read 10533 times.

Great news for us PW "fans"!

I presume this is some form of the GTF?

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: FriendlySkies
Posted 2013-01-08 11:45:14 and read 10535 times.

That's great news for P&W. It looks like a lot of companies are banking on the GTF being a success, it will be interesting to see how/if GE and RR respond if the GTF meets or (looking likely) exceeds expectations.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: timboflier215
Posted 2013-01-08 11:47:23 and read 10524 times.

Quoting FriendlySkies (Reply 2):
it will be interesting to see how/if GE and RR respond

Hasn't RR bought a stake in the GTF program?

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-08 11:50:25 and read 10487 times.

Quoting timboflier215 (Reply 3):
Quoting FriendlySkies (Reply 2):
it will be interesting to see how/if GE and RR respond

Hasn't RR bought a stake in the GTF program?

and GE just bought Avio who is a major GTF parts supplier

http://www.bloomberg.com/news/2012-1...illion-to-secure-supply-chain.html

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-08 12:31:31 and read 10309 times.

The OP link is now a "404".  


I really hope this is true! Great news for Embraer and Pratt.

I wonder if it will be a new low spool for the E170. It could use a slightly de-rated MRJ engine... But a custom job might be fractionally lighter and would have better fuel burn (but only slightly).

The E-190/E-195 need slightly more thrust than the PW1200G is designed for. It would require a small amount of fan growth. The C-series engine is too much engine (high fuel burn) and thus an MRJ growth). By that I mean most likely a 2 stage LPC, but a larger fan to provide the needed thrust.

Details will be interesting. I propose this will be the PW1700G with the PW1800G saved for a future Boeing or Airbus program. Perhaps two engines (PW1600G and PW1700G).

Quoting queb (Thread starter):
"United Technologies Corp. (UTX)’s Pratt & Whitney unit won an agreement to make engines for Embraer SA (EMBR3)’s revamped regional jets

I hope that is true!   

Quoting Revelation (Reply 1):
Great news for us PW "fans"!

Yes!   

Quoting timboflier215 (Reply 3):
Hasn't RR bought a stake in the GTF program?

And RR is fairly far along in developing the needed technology. I assume they will ramp up quickly.

Quoting FriendlySkies (Reply 2):
it will be interesting to see how/if GE and RR respond if the GTF meets or (looking likely) exceeds expectations.

GE will have to respond for if the GTF exceeds then the C-series will sell better than current expectations. It would also benefit the A321 tremendously as there is high interest in expanding the range of the A321NEO. e.g., the new HA order (but which engine will they pick?). However, it is now 'too late' for GE for Embraer (if true). With the C-series and E-jets with Pratt, that 'turns the tables' on the CF-34. That engine becomes the next JT8D. (Great maintenance until the competition matures but a fuel burn penalty. I'm using the MD-80 vs. 733 analogy.)

Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: fruitbat
Posted 2013-01-08 15:25:25 and read 10087 times.

On the Embraer website:

http://www.embraer.com/en-US/Imprens...a-a-segunda-geracao-de-E-Jets.aspx

GE won't be happy with this, loss of incumbency must hurt!

Quoting lightsaber (Reply 5):
And RR is fairly far along in developing the needed technology. I assume they will ramp up quickly.

AFAIK RR won't be making any components for announced GTFs, and the partnership is for the A320 NEO GTF only...or am I missing the point?

Another endorsement of the GTF, and E-Jet vs C-Series will be an interesting battle!

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-08 15:25:34 and read 10090 times.

Confirmation:

http://www.pw.utc.com/Press/Story/20130108-1605/2013/All%20Categories

http://www.embraer.com/en-US/Imprens...a-a-segunda-geracao-de-E-Jets.aspx

http://www.embraer.com/PublishingImages/press-releases/Second%20Generation%20E-Jet%20Conceptual%20Image.jpg

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-08 15:27:02 and read 10072 times.

no more winglets, now raked wing tips

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aesma
Posted 2013-01-08 16:12:35 and read 9830 times.

Quoting queb (Reply 8):
no more winglets, now raked wing tips

Looks superb ! I hate huge vertical winglets.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Devilfish
Posted 2013-01-08 16:24:47 and read 9745 times.

Quoting lightsaber (Reply 5):
The E-190/E-195 need slightly more thrust than the PW1200G is designed for. It would require a small amount of fan growth. The C-series engine is too much engine (high fuel burn) and thus an MRJ growth). By that I mean most likely a 2 stage LPC, but a larger fan to provide the needed thrust.

Details will be interesting. I propose this will be the PW1700G with the PW1800G saved for a future Boeing or Airbus program. Perhaps two engines (PW1600G and PW1700G).

P&W is hewing closer to Embraer's aircraft model numbers.....

http://www.flightglobal.com/news/art...fans-new-wings-fly-by-wire-380821/

Quote:
"In a coup for engine maker Pratt & Whitney, the next version of the E-170 and E-190 family will be powered by the PW1700G and PW1900G geared turbofans, respectively, replacing General Electric CF34s on first-generation E-Jets, says Paolo Cesar Silva, president of Embraer commercial aviation.

[.....]

By integrating the 22,000lb-thrust PW1900G, the second-generation E-195 will have 10% more power than currently available on the CF34-10E. That allows Embraer to consider stretching the fuselage of the E-195 to contain more payload, or burning fuel at a lower thrust setting and prolong the life of the engine."



Slightly larger fan on the PW1900G.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: infiniti329
Posted 2013-01-08 16:39:43 and read 9667 times.

Quoting queb (Reply 8):
no more winglets, now raked wing tips

Curious to see as how this will work out as boeing holds two patents for raked wing tips

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-08 16:50:29 and read 9617 times.

Quoting infiniti329 (Reply 11):
Curious to see as how this will work out as boeing holds two patents for raked wing tips

Boeing & Embraer are now partners on different programs, maybe the partnership has been extended.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: r2rho
Posted 2013-01-09 01:30:42 and read 8978 times.

Wow... this is a huge coup for the GTF!  Wow!

The E-jet "NEO" was a no-brainer and just a matter of time, but it was GE's to lose. I was really expecting the GE-EMB partnership to continue, and the Ejets to be the launch platform for the NG34, distinguishing themselves from GTF-powered offerings. But it seems EMB was not convinced, or perhaps the NG34 would be too late to market.

GE has gone from having the monopoly over the 70-120 RJ market to being kicked out of it completely. All new-generation RJ offerings are GTF powered, plus the Saturn-Snecma powered SSJ. GE's only remaining hope is on business jets and/or if BBD launches a CRJNEO. Oh yeah, and there's still the ARJ21...   

The E175 1700G will be derived from the MRJ 1200G...no surprises here. But the E19x 1900G will be derived from the larger CSeries 1500G... add to that the new wing and we can know almost for sure that a stretch is in the making, even if not yet officially announced.

I wonder what the E17x wing will look like, but my bet is on the E170 to disappear.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aviaponcho
Posted 2013-01-09 02:45:14 and read 8844 times.

Hello,

What's striking is the fact that Embraer as chosen the very same powerplant as its 2 main competitors..

The E175 seems to have a hard time against the MRJ, the E175G2 will use a 1 ou 2 year younger PW1200G derivative
The E190/195 is have hard time agains the Cseries, The G2 will use a 3 year yougner PW1500 G derivative

So Embraer will be facing all new design with a half / new design with almost the same engines

I'm not sure it's a genious move
I'm not sure of the contrary
Sure It's a serious bet

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Revelation
Posted 2013-01-09 05:20:28 and read 8550 times.

Quoting r2rho (Reply 13):
I was really expecting the GE-EMB partnership to continue, and the Ejets to be the launch platform for the NG34, distinguishing themselves from GTF-powered offerings. But it seems EMB was not convinced, or perhaps the NG34 would be too late to market.

To me it's evidence that the GTF is meeting or exceeding expectations.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lostsound
Posted 2013-01-09 05:35:37 and read 8468 times.

Raked wing tips? Interesting. Those engines trump the fuselage of the Ejet haha.

Already one of the best selling regional jets, so these enhancements can only keep the series going strong.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-09 06:30:34 and read 8024 times.

Quoting fruitbat (Reply 6):
AFAIK RR won't be making any components for announced GTFs, and the partnership is for the A320 NEO GTF only...or am I missing the point?

You are correct, however RR has had low intensity GTF studies going on for a while per my 'rumor mill.'

Quoting fruitbat (Reply 6):
E-Jet vs C-Series will be an interesting battle!

Either way, Pratt wins a la CRJ-900 vs. E190 did for GE.   

Quoting queb (Reply 8):
no more winglets, now raked wing tips

Ok, I had the same thought as infiniti329:

Quoting infiniti329 (Reply 11):
as boeing holds two patents for raked wing tips

If Embraer goes forward, this implies optimizing for a slightly longer mission.

Quoting Devilfish (Reply 10):
will be powered by the PW1700G and PW1900G geared turbofans,

But this doesn't say if it is a 2-stage LPC or 3-stage. Time will tell. At least I was right that Pratt would ave the PW1800G number for a later model... Otherwise I was off on the numbering. Cest la vie.

Quoting r2rho (Reply 13):
GE has gone from having the monopoly over the 70-120 RJ market to being kicked out of it completely.

That amazes me. Only the Superjet will compete with a non-Pratt (unless the CRJ-9 gains a 2nd life, which is unlikely).

Quoting Aviaponcho (Reply 14):
What's striking is the fact that Embraer as chosen the very same powerplant as its 2 main competitors..

No choice. Time to market for a LEAP derived engine would have Embraer pushed out of the market. It is also unlikely that a non-GTF could match the weight of a GTF on the smaller engines. GE's approach has been to increase the low spool turbine stages and that is tough without going to pressure ratios that do not make economic sense on such small engines.

Quoting Revelation (Reply 15):
To me it's evidence that the GTF is meeting or exceeding expectations.

My rumor mill insists on that...

Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aviaponcho
Posted 2013-01-09 06:39:17 and read 7946 times.

Quite Off topic,
But Lightsaber, if I understand, GTF will be lighter on MRJ/Cseries than Leap derived engine
And what about on the NEO ... from what I gather in public documents, the Leap, once lighter, is now +50 / +150 kg per engine vs initial assumptions .. and maybe vs the PW1100G
What do you think ?

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-09 06:57:10 and read 7772 times.

Quoting Aviaponcho (Reply 18):
But Lightsaber, if I understand, GTF will be lighter on MRJ/Cseries than Leap derived engine
Quoting Aviaponcho (Reply 18):
And what about on the NEO ... from what I gather in public documents, the Leap, once lighter, is now +50 / +150 kg per engine vs initial assumptions .. and maybe vs the PW1100G
What do you think ?

I'm amazed with the LEAP weight on the NEO. With that many stages the only way CFM could have pulled it off is very advanced hollow blade technology.

However, GE is going with high pressure ratios. Stick with me for a bit of technical discussion... Leak area goes with compressor diameter (as blade tip gap heights are a technology limit) while flow area goes more with diameter squared. So larger engines have more flow path to leak area. Thus, they benefit more by pressure ratio as they have more efficient compressors and turbines. Larger engines also have lower blade surface area for flow area ratios which also improve compressor efficiency (less impact on the turbine). So for a smaller engine, it will be impossible to stick with the agressive pressure ratios.

This is one reason the smaller GTFs have a lower pressure ratio than the larger ones. The other is that larger engines burn more fuel and thus its worth more engineering dollars (hours) to optimize them. The GTF 'cost burden' has already been spent. In fact, the GTFs are incredibly simple engines. Elegant if I may say so.


Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aircellist
Posted 2013-01-09 08:06:45 and read 7208 times.

Lightsaber,

Thanks for the explanations.

Please excuse a layman's question: would an intermeshing contrarotating turbine, like on the GE UDF of yesteryears, counter the problem of the leaks, or if that has nothing to do, there will still and always be leaks?

I hope it's not too far out of topic...

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Devilfish
Posted 2013-01-09 08:14:05 and read 7142 times.

Quoting infiniti329 (Reply 11):
two patents for raked wing tips

I wonder by how much those could increase the E-jet2G' ranges compared to the present?

Quoting lightsaber (Reply 17):
But this doesn't say if it is a 2-stage LPC or 3-stage.

Given that the E-Jets2G engine variants will be based on the MRJ's PW1200G and CSeries' PW1500G.....

http://www.flightglobal.com/news/art...ead-in-70-120-seat-segment-380822/

Quote:
"P&W will adapt the PW1700G from the MRJ's PW1200G and the PW1900G from the Bombardier CSeries' PW1500G, Saia says.

The PW1700G will feature the same 142cm (56in)-diameter fan of the MRJ engine, and the PW1900G will share the 185cm-diameter fan with the CSeries engine."



.....doesn't it follow that their LPC stages could also be adopted for each version respectively (taking into consideration the flexibility for a HGW model)?



[Edited 2013-01-09 08:38:35]

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aesma
Posted 2013-01-09 08:28:28 and read 7019 times.

Quoting Aviaponcho (Reply 14):
So Embraer will be facing all new design with a half / new design with almost the same engines

I'm not sure it's a genious move
I'm not sure of the contrary
Sure It's a serious bet

At first I'm sure it will keep the line running, all the current operators of E-jets are likely to be interested. And the idea is probably to have the opportunity to be cheaper than the competitors if the need arise.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-09 08:47:53 and read 6898 times.

Quoting Aircellist (Reply 20):
would an intermeshing contrarotating turbine, like on the GE UDF of yesteryears, counter the problem of the leaks, or if that has nothing to do, there will still and always be leaks?

   That is a colder turbine intermesh. That design has *worse leaks*, but better efficiency due to the contra-rotation. (One impact overcomes the other.) Due to the sharp rise in turbine inlet temperatures, such designs are not durable enough for today's engines.

The blade tip clearences between the outer diameter of the blade and the inner diameter of the casing impact compressor and turbine efficiency. Those clearences in thousanths of an inch (just about 0.001") are a function of the vendor technology. It doesn't matter if it is a GE-90 or a PW1700G, that tip clearance is about the same. So there is backward internal leakage of air in a compressor that then must be recompressed (as it leaked backwards) and forward leakage in a turbine (which does no work turning the turbine). So a smaller engine will have worse component inefficiencies. That is just the reality. Thus the best economic pressure ratio drops.

Quoting Devilfish (Reply 21):
.....doesn't it follow that their LPC stages will also be adopted for each version respectively?

It does, until one gets into the details. The PW1700G will need more thrust than the PW1200G. Thus, a higher pressure ratio. The opposite is true fo the PW1900G vs. the PW1500G. Thus the low pressure spools must be optimized for the new thrusts. Now, I expect the nacelles to gain the variable nozzles, or about 2% free thrust.

I do not know if the PW1700G can have the 2-stage LPC meet the increased airflow requirements. It might be possible to just put on a little largr diameter 2-stage compressor and compress that air enough to meet thrust requirements. With a variable fan nozzle, the low spool will be fractionally more efficient. The fan on this engine will require a non-subtle change to deal with greater tip Mach numbers too, but I know Pratt can do that as per the GP7200. It might also help that the gearbox ratio could be subtly changed to gain the increased thrust.

The PW1900G is easy with 3-stages. But perhaps the required thrust drop allows Pratt (and Embraer) to save the cost and weight of a 3-stage low pressure compressor. I suspect the PW1900G will stick with 3-stage (80%+ chance), but there is a small chance Pratt could economize.

With the PW1700G/PW1200G, I question the blade loading on the LPC and if there was enough margin left over from the PW1200G. It should be as you suggest. But the 'devil is in the details.'

Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: PresRDC
Posted 2013-01-09 08:56:01 and read 6823 times.

Quoting fruitbat (Reply 6):
AFAIK RR won't be making any components for announced GTFs, and the partnership is for the A320 NEO GTF only...or am I missing the point?

A few things happened.

1. P&W bought-out RR's stake in International Aero Engines. RR is still a supplier to IAE, but is not a partner in IAE.
2. P&W created a consortium for the A320neo engine. RR is not a member of this consortium.
3. P&W and RR entered into a new JV to jointly develop new engine options for future narrowbody applications. This is expected to be the go to market path for Boeing and Airbus 737 and A320 replacement aircraft, whenever those come out (late 2020s, I think is the expectation).

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: ytz
Posted 2013-01-09 10:40:18 and read 6254 times.

Wonder where this leaves the CSeries. Looks like the CS100 will have some serious competition now.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Dash9
Posted 2013-01-09 11:44:10 and read 5887 times.

Quoting r2rho (Reply 13):

GE has gone from having the monopoly over the 70-120 RJ market to being kicked out of it completely. All new-generation RJ offerings are GTF powered, plus the Saturn-Snecma powered SSJ. GE's only remaining hope is on business jets and/or if BBD launches a CRJNEO. Oh yeah, and there's still the ARJ21..

Not true, GE is supplying the 'soon-to-market ARJ21' (insert joke here).

Beside, GE is also supplying the engine on the new BBD Global 7K/8K. Engine is know as Passport 20, previously known as TechX / NG34. So GE is not left out of the RJ / large bizjet completely, but its position will be much smaller.

-Dash9

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aircellist
Posted 2013-01-09 12:14:26 and read 5853 times.

Lightsaber: thanks for the explanations!

One thousandth of an inch... That's close! Impressive.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-10 06:28:34 and read 5302 times.

Quoting Dash9 (Reply 26):
Not true, GE is supplying the 'soon-to-market ARJ21' (insert joke here).

   Yes, the ARJ21. Someone really needs to tell me what market it was designed for where it is superior to the competition. I've yet to determine one.

Quoting Dash9 (Reply 26):
GE is also supplying the engine on the new BBD Global 7K/8K.

GE will do well in the business jet market. However, that is PWC's traditional ground, so I expect to see many of the PW1000G series shopped around. As you noted, GE will have a smaller position.

Quoting Aircellist (Reply 27):
One thousandth of an inch... That's close! Impressive.

That order. It might be two....   I don't design the optical control loops.    Oh, and thanks.

Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aviaponcho
Posted 2013-01-10 07:32:20 and read 5199 times.

Quoting lightsaber (Reply 19):
I'm amazed with the LEAP weight on the NEO. With that many stages the only way CFM could have pulled it off is very advanced hollow blade technology.

However, GE is going with high pressure ratios. Stick with me for a bit of technical discussion... Leak area goes with compressor diameter (as blade tip gap heights are a technology limit) while flow area goes more with diameter squared. So larger engines have more flow path to leak area. Thus, they benefit more by pressure ratio as they have more efficient compressors and turbines. Larger engines also have lower blade surface area for flow area ratios which also improve compressor efficiency (less impact on the turbine). So for a smaller engine, it will be impossible to stick with the agressive pressure ratios.

This is one reason the smaller GTFs have a lower pressure ratio than the larger ones. The other is that larger engines burn more fuel and thus its worth more engineering dollars (hours) to optimize them. The GTF 'cost burden' has already been spent. In fact, the GTFs are incredibly simple engines. Elegant if I may say so.


Lightsaber

Hello lightsaber
The GTF fan should be fairly light also, spinning a lot (?) slower ... so much less energy in case of blade-off, so a lighter fan containment ring ?
As you said, I find it rather elegant

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Revelation
Posted 2013-01-10 07:49:39 and read 5173 times.

Quoting Aviaponcho (Reply 29):
The GTF fan should be fairly light also, spinning a lot (?) slower ... so much less energy in case of blade-off, so a lighter fan containment ring ?

The GTF gearing allows the fan to spin slow and the turbine to spin fast. I think the gear ratio is 3:1 or 4:1 but I couldn't find it in my quick web search. Not sure how much slower the fan will be going but we can see the engine's spool will be going a lot faster, and it has a lot fewer stages/blades than does the competition.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: ferpe
Posted 2013-01-10 08:47:26 and read 5103 times.

The big question is if this loss for GE is due to perceived inferior technology by Embraer or bad timing of their new offering. If it is the former GE is in trouble with it's straight architectures, first at the low to mid range but later also for the DA engines. RR have covered their bases with the PW JV, GE have not (but they are acquiring the gearbox manufacturer AVIA).

How much of the gearbox secrets rests with AVIA and how much with PW? Me thinks the move by GE is not only to vertically integrate, the AVIA move came a month ago, they should have known then they were in trouble with Embraer and they can also count like we all do now. I suspect we will see a GTF from GE soon  Wow! .

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: fruitbat
Posted 2013-01-10 10:41:46 and read 4925 times.

[quote=ferpe,reply=31]
How much of the gearbox secrets rests with AVIA and how much with PW? Me thinks the move by GE is not only to vertically integrate, the AVIA move came a month ago, they should have known then they were in trouble with Embraer and they can also count like we all do now. I suspect we will see a GTF from GE soon.[quote]

A UDF needs a decent gearbox as well.......   

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: ferpe
Posted 2013-01-10 10:55:49 and read 4882 times.

Quoting fruitbat (Reply 32):
A UDF needs a decent gearbox as well.......

Absolutely, PW/RR should be contemplating what to do now. I can imagine the German part of RR or MTU could spring in, if there is anywhere they know how to make gears it would be Germany   .

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: queb
Posted 2013-01-10 11:36:39 and read 4801 times.

Quoting fruitbat (Reply 32):
AVIA

It's Avio not Avia

"...to produce the P&W designed fan drive gear system for the Pure Power® PW1100G-JM engine. Under the agreement, Avio will also design the accessory gearbox and the oil tank for the engine and produce those components as well."

http://www.aviogroup.com/en/media_ce...s_the_pw1100g_jm_engine_programme/

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: EaglePower83
Posted 2013-01-10 11:55:59 and read 4763 times.

So PW contracted to have Avio produce their fan drive gear system.
GE bought Avio.....
LOL..............that's messed up. Very shrewd, GE.
But, I suppose it's not too different from HamiltonSundstrand/Goodrich supplying parts for GE engines.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: Aviaponcho
Posted 2013-01-10 12:42:07 and read 4691 times.

Ferpe
Checking on Avia I find this old link

http://www.aviationweek.com/Article....l/avd_05_23_2012_p03-01-460944.xml

Quote:

Meanwhile, GE Aviation also is ready for regional jet manufacturers to make a decision on next generation aircraft and is in “active discussions” with Embraer. The engine maker, which says it could develop a new RJ powerplant in 48 months, expects a 15-20% lower fuel burn when compared to its CF34-10E5 and CF34-8C5 engines thanks to improvements in both propulsive and thermal efficiency.

The thrust can be pushed to about 23,000 pounds, says Paxson, noting that one Embraer redesign for its E-Jets (that has since been scaled down) needed as much as 24,000 to 25,000 pounds of thrust, which would require an engine like CFM International’s LEAP engine (which is developed by GE and Snecma).

So 2013 + 48 months + 12 months flight test on airplane is = 2018

So I'm not sure PW beats GE on availability...

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: lightsaber
Posted 2013-01-10 21:09:40 and read 4427 times.

Quoting Aviaponcho (Reply 29):
The GTF fan should be fairly light also,

What amazes me is the LEAP matches (actually beats) the GTF weight. Pratt wasn't aggressive in other weight reduction as the GTF did the work. So GE is taking on risk there (components having weight where it is needed are less risky).

Quoting ferpe (Reply 31):
The big question is if this loss for GE is due to perceived inferior technology by Embraer or bad timing of their new offering.

I think timing and risk for a similar performance. For GE to match the GTF, they must do a jump in turbine inlet temperatures. The last engine to do a similar size jump in turbine inlet temperatures was the PW2000, whose turbine had HALF the promised life!    The LEAP/TECH-X/whatever its called today has risk too.

I believe the call was on technical (maintenance/dispatch risk) and schedule risk on the GE.

Quoting ferpe (Reply 31):
How much of the gearbox secrets rests with AVIA and how much with PW?

The details of gear cooling and deducting gearbox life from temperature trends is Pratt proprietary. A HUGE part of the GTF is knowing when they will fail. Or more precisely, being able to tell the airline there are 400 safe takeoffs left (which really means 1200) before a failure so an engine swap is scheduled without revenue impact. That is the hard part.

Quoting Aviaponcho (Reply 36):
So 2013 + 48 months + 12 months flight test on airplane is = 2018

So I'm not sure PW beats GE on availability...

But that is 2018 for a mis-sized E-170 engine. Due to the higher thrust for the E-190, add two more years.

And the last engine to be developed on that time frame is the PW6000... No one has forgotten that mistake!

Quoting EaglePower83 (Reply 35):

So PW contracted to have Avio produce their fan drive gear system.
GE bought Avio.....

Avio does great gears... So GE will learn some. But Pratt would have put them under contract, so it won't be too much. GE isn't ready for a GTF with an EIS before 2021. After that? Sure. RR could do a 2019 GTF. Until then, Pratt has a narrow window to re-enter the market.

I'm stunned Pratt is on the MRJ, C-series, NEO, MS-21, and now E-jets. Even as a Pratt fan, I couldn't have dreamed of such a portfolio even a few years ago.   

Lightsaber

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: tjh8402
Posted 2013-01-11 20:48:12 and read 3931 times.

Quoting lightsaber (Reply 28):
GE will do well in the business jet market. However, that is PWC's traditional ground, so I expect to see many of the PW1000G series shopped around. As you noted, GE will have a smaller position.

Does GE have plans to expand below the Passport 20's category? The large cabin segment of the biz jet market GE is jumping into has been Rolls-Royce's stomping grounds, not P&WC. This is partially due to RR's longstanding relationship with Gulfstream (every in house designed and built Gulfstream model has used RR engines from the begining). The Embraer Legacy 600 and 650 use Rolls-Royce AE3007's, the Gulfstream IV's use RR Tays, the V/550's, 650, and the Global Express, Global 5k, Global XRS, and Global 6k all use the BR700 family. The Challenger 600 series has been GE's only customer. The only ULH large cabin airframe to feature Pratts is the Dassault Falcon 7x, but the trijet design means its engines are from smaller category aircraft (the 7x using the same engine family as the smaller Learjet 60, Gulfstream G200, Citation Sovereign, and Falcon 2000).

P&WC's ubiquity is not so much due to them being offered on a lot of different aircraft, but that they were the engine supplier for 3 of the best selling bizjets ever (not surprisingly all very popular with fractionals) the Citation 500/550/560 series, the Citation 560XL, and the Beechjet/Hawker 400xp.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: JoeCanuck
Posted 2013-01-11 21:15:44 and read 3898 times.

Quoting lightsaber (Reply 5):
With the C-series and E-jets with Pratt, that 'turns the tables' on the CF-34.

The passport engine could still end up on the CRJ's. It might be a fairly straight upgrade since they will be on the Global 7/8000's in the right power range.

Quoting fruitbat (Reply 32):
A UDF needs a decent gearbox as well

I wonder if they could do contra rotating UDF's on separate shafts, each with their own lpt.

Topic: RE: Embraer Picks P&W For Re-engined E-Jet
Username: seabosdca
Posted 2013-01-11 22:48:53 and read 3826 times.

I know this is really an engine thread, but that rendering looks fantastic with the big fans. Looks like a baby A320neo. Will they have to extend the landing gear?


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