ACTUALITE Aéronautique : Suivi et commentaire de l\'actualité aéronautique
! (Pas pour Boeing 
) 
, force est de constater qu'en entend assez peu parler du GenEx qui vole beaucoup moins que le T1000. 
!)
qui ne mettent, avec leur trois arbre, que péniblement 1/2 % dans la vue au Genx 2 arbres ... et en faisant péter la chaudière en plus !
on peut respirer ! 
...... 
, juste une mesure de sécurité pour les oreilles, comme au stand de tir ! sont aux portes, c'est bien, avec quand même de profonds remaniements, dont un déplacement des compresseurs, de mémoire et vu ailleurs !
, vont pouvoir retirer les boules Quies, les pilotes de Boeing !
à travers un petit coup de DPO, perfide peut être, les GEnx présenteraient des PB de icing - dé-icing, bon, à suivre, pas sur la toile pour l'instant, même pas dans le buzz, on verra !
... bof, ça ne fait pas sauter la chaudière chez les autres ... alors ??Beochien a écrit:14 000lbs c'était SUH qui le disait pour le 787-9 en 2008-9 !
Donc moins pour le 787-8 et de plus l'actuel doit déjà commencer la cure, vu les retards!
Et 4 Tonnes, ben ça va jusqu'à 4,5T en arrondissant (Honnêtement)!
Et il paraît qu'il y aura déjà un gain de poids après le 6eme !
Aussi, les RR T1000, doivent peser les 2 ensemble +/- 300 lbs de moins que les GEnx, dry weight d'aprés wikip !
Bon, j'ajoute après Poncho ...
Le petit jeu des augmentations de MTOW, efface bien les PB d'emport !
Évidemment l'efficacité en souffre un peu !
Et le A350 est dans le même jeu 2 T tous les 6 mois ... !
Le A400M n'en parlons pas on ne sait même plus ou il en est !
Et RR va faire cadeau de 0,5 % de SFC au 787 ... ca valait bien un petit boum à Derby ...
JPRS
avec le devis de poids, avec dates et séries concernées ? 
2010, l'année Roll Royce
Just over an hour ago Boeing 787, ZA001, took to the air again with a test flight from Roswell, New Mexico where it has been grounded for the past week following an engine surge on Sept 10. The test flight is planned as a gentle ‘rub-in’ run for the tip clearances inside the new Trent 1000 engine that was shipped to New Mexico to replace the damaged unit.
If all goes well, Boeing hopes to pick-up where it left off last Friday with additional braking, rejected take-off and handling tests, and will be looking to catch up on lost time.
Tests are meanwhile underway on ZA002, which has close to 500 flight hours on the clock since its recent long range flight to Iceland for cross wind tests. The aircraft is back at Being Field where ground tests of the aircraft’s fire detection and suppression systems are planned. Hamilton Sundstrand's Kidde Aerospace & Defense subsidiary provides the cargo and engine fire detection and suppression systems which comprise smoke and fire detectors, fire suppression bottles and nozzles.
The interiors test airframe, ZA003, is set to undergo ground tests for precipitation static (P-static) at Boeing Field. The aircraft has over 240 flight hours in the log book, but has not flown since returning from Florida at the start of the week. Tests in Florida included high-humidity ‘rain-in-the-plane’ evaluations to deliberately stress the environmental control system.
P-static is one of several natural electrostatic effects, such as lightning, that can cause severe degradation to aircraft and mission systems. The test is another key evaluation of the 787’s largely composite primary structure and its ability to provide protection against these effects. The P-Static environment will be simulated using a device that uses high-voltage charging probes.
ZA004, which has also been on the ground for around a week, is believed to have completed the long drawn out flight loads survey which culminated with sonic fatigue and thrust reverser tests. Following a functional check out flight at Victorville, Calif, where it has been based for several months, ZA004 is due to fly on Saturday to Glasgow, Mont, for the start of community noise tests. Flights will be made over and around the former Strategic Air Command base which is equipped with an array of noise detectors.
Engine checks continue on ZA005, the first General Electric GEnx-1B powered 787. The aircraft, which has not flown since Sept 4, also resumed flights today with a test sortie for the left engine. No sign of when ZA006 will yet join the flight test campaign which, as of an hour ago, has logged 1,850 flight hours over almost 600 flights
Cause of 787 engine test failure remains unclear
As Boeing's lead 787 returned to flight operations on 17 September following an engine surge, uncertainty continues to surrounds the investigation into the 2 August uncontained failure in ground testing of a Package A Rolls-Royce Trent 1000 engine.Boeing says the ongoing investigation by itself, Rolls-Royce and regulators into the incident that destroyed a production engine and damaged the engine maker's Bed 58 test facility in Derby, UK "includes a review of safety and continued airworthiness as prescribed by EASA and Federal Aviation Administration requirements"."When the investigation is complete," says Boeing, "and we have more information about causes and solutions, we will work with the regulatory agencies to comply with the applicable processes."
The cause of the failure remains unclear, although the failure was preliminarily traced to the intermediate pressure turbine due to an oil fire following excessive build up of oil that weakened the shaft.Industry sources say R-R has suggested an improper test procedure may have been involved in the incident, however the engine maker's original statement of 16 August says a "modification is already in place for later engines", suggesting a design change to the Trent 1000.R-R has since resumed production of Trent 1000 engines and delivered a pair of Package A powerplants for Airplane Nine during the week of 7 September for ETOPS testing.ZA001, the lead 787 test aircraft, suffered an unrelated engine surge of one of its Trent 1000 engines while taxiing in Roswell, New Mexico on 10 September, prompting a changeout of the powerplant. First 787 delivery is slated for February 2011 to Japan's All Nippon Airways.
http://www.flightglobal.com/articles/2010/09/24/347747/cause-of-787-engine-test-failure-remains-unclear.html
Boeing flight test plans to conduct a final “safety walk” for the second, and final General Electric GEnx-1B powered 787 test aircraft tomorrow as a prelude to first flight which could come as early as Oct 3. The team plans to conduct the Boeing B-1 pre-flight ground test on Oct 2.
The second GEnx-1B powered 787 is poised to join its test sibling, ZA005. (Joe Walker)
All Things 787 has blogged interesting new detail about the current displacement of the rest of the test fleet, including a comment about an engine change on ZA001. Having recently had one engine change associated with the Sept 10 surge incident in Roswell, New Mexico, it is feasible this second swap-out is in some way connected. The blog speculates both ZA001 and 002 should return to flight around Oct 5. ZA002 is undergoing extensive ground tests including, most recently, the fire suppression system.
ZA003, meanwhile is also running ground tests including a planned certification test later this week for the windshield rain removal system.
ZA004 is undergoing engine upgrade work. It is not yet known if this is the planned engine swap-out to replace the early hybrid Package A Trent 1000 versions with the upcoming Package B versions. The work coincides with reports from the Seattle Times stating that Rolls-Royce is this week presenting "a series of fixes" to Boeing to address the intermediate pressure spool problem that caused a Trent 1000 to fail on a test stand in Derby on Aug 2.
Interestingly, the first GE-powered 787 has also been subject to engine work amid growing speculation that not all is running smoothly with the GEnx-1B. The aircraft has not flown since making a 16 min flight on Sep 19, and is currently undergoing fan duct leakage checks. Prior to its last flight, ZA005 flew only once before (on Sep 17) during a 15-day period.
Flightblogger also provides a useful round-up of news, including interesting intelligence about the re-start of production after an 18-day “manufacturing float” to again give time for suppliers to catch up. The re-start will force more completed aircraft into the open with 787s moving to new areas of Paine Field for extended storage
The second GE-powered 787, ZA006 looks set to make its first flight sometime on Monday morning (Oct 4), following successful pre-flight tests over the weekend. The flight will come as a welcome fillip to the GE test effort which has been slowed with extensive ground testing of sister ship ZA005. Further ground tests of a recently installed improved production standard GEnx-1B engine are expected tomorrow while the ZA006 flight crew gears up for their first flight.
While ZA001 and ZA004 also undergo engine-related lay-ups, ZA003 will be undertaking a further series of ground tests this week – some associated with safety systems such as the emergency oxygen supply, as well as measurements of noise from the auxiliary power unit – a sensitive certification issue for the airport ramp environment. The ground work will follow a planned flight test to check out noise levels inside the forward fuselage, as well as discrete tones with certain flap settings. Tests on ZA002 will focus on a series of ground-based checks of the engine oil quantity measuring system.
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par art_way Ven 17 Sep 2010 - 8:45