Boeing 787 (3)
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LightWeight
Inscrit le 28/12/2006 |
# 21 août 2010 15:23 | |
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Bonjour, Boeing a semble-t-il rendu utilisable un procédé d' aspiration de la couche limite sur les bords d' attaques des 3 empennages, avec 1 % d' économie en carburant à la clé. http://www.aviationweek.com/aw/blogs/co ... d=blogDest Un système semblable avait été démontré par la NASA dans les années 70, mais n' avait pas eu d' application à cause de l' entretien nécessaire à l' époque, aussi à cause de problèmes liés au givrage. Boeing a dû améliorer le système (diamètre des micro-trous/matériaux)pour le rendre exploitable..... |
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Beochien
Inscrit le 13/02/2007 |
# 21 août 2010 16:39 | |
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Merci Lightweight ! Intéressant ! Ce serait pour le 787-9 ! Pour l'instant ils chassent le vortex partout sur la queue ... en mettant des vortex suppressors ou generators, sais plus ... peut être les deux ! Peut être en désespoir de cause, les petits trous aspirateurs, maintenant... mais pourquoi seulement sur la queue .. ! On verra ! JPRS (Dernière édition le 21 août 2010 16:52) _________________ JPRS |
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LightWeight
Inscrit le 28/12/2006 |
# 21 août 2010 18:02 | |
| Ce serait plus compliqué sur la voilure à cause des becs, avec moins de bénéfice peut-être, les profils n' étant pas les mêmes. | ||
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gerfaut
Inscrit le 27/03/2008 |
# 22 août 2010 20:08 | |
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ZA001 a fait des tests de freinage il y a quelques jours à Roswell...au Nouveau-Mexique. Une vidéo et quelques explications http://www.youtube.com/watch?v=3GGJI0idcS4 une carte http://maps.google.com/maps?hl=fr&t ... ;q=roswell http://www.seattlepi.com/local/6420ap_n ... tests.html (Dernière édition le 22 août 2010 20:14) _________________ "Je prends tout doucement les hommes comme ils sont, j' accoutume mon âme à souffrir ce qu' ils font" (Le Misanthrope, Molière) |
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Effgez
Inscrit le 02/12/2008 |
# 22 août 2010 20:25 | |
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Bonsoir à tous, Gerfaut, le Roswell International Air Center où ont lieu les essais mentionnés pour le 787 n'est pas le Roswell situé au nord d'Atlanta en Géorgie, mais le Roswell des petits hommes verts au Nouveau Mexique. Lien vers la carte. Cordialement, Effgez  |
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gerfaut
Inscrit le 27/03/2008 |
# 22 août 2010 20:37 | |
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Bonsoir Effgez, Oui, j' avais bien vu, tappez 'roswell airport' sur google maps, vous verrez la carte de l' aéroport que je voulais vous montrer, maintenant si vous copiez l' adresse de la carte, cela vous donne ce que vous avez dû corriger... On ne peut pas prendre l' adresse d' une carte obtenue sur google maps
(Dernière édition le 22 août 2010 20:53) _________________ "Je prends tout doucement les hommes comme ils sont, j' accoutume mon âme à souffrir ce qu' ils font" (Le Misanthrope, Molière) |
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Beochien
Inscrit le 13/02/2007 |
# 24 août 2010 22:55 | |
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Bonsoir, Chez les Anglo Saxons, il n'y a pas que Bernstein! Il y en a aussi qui ont le moral à pas variable chez Seeking Alpha ! Par Exemple Bruce Krasting ! http://seekingalpha.com/article/222041- ... -albatross JPRS _________________ JPRS |
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Beochien
Inscrit le 13/02/2007 |
# 25 août 2010 20:21 | |
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Bonsoir ! Un test Icing du 787 ... en plein Aout à Seattle ... Ben oui c'est possible chez Boeing ! Conditions ... plutôt à basse vitesse, décollage -Atterro ! Suffit de Coller-Scotcher de la "Fausse Glace" sur les bords d'attaque ! Bon, pour les interprétations de cette simulation, par 30°+ à l'ombre va falloir être costaud à mon avis ! ---------------- Jon Ostrower nous raconte cela sur FG Extrait !! -------------- http://www.flightglobal.com/blogs/fligh ... or-ha.html 787 gets iced in August for handling qualifications By Jon Ostrower on August 25, 2010 7:00 AM | Permalink | Comments (0) | TrackBacks (0) |ShareThis ZA005-IceShapes_1000.jpgHow is it possible that 787 is flying icing tests in late August in the skies over Seattle? In fact, Boeing's fifth 787 flight test aircraft - ZA005 ( N787FT) - has been been doing exactly that - flying maneuvers to evaluate the handling and stall characteristics as if ice were forming on the 787's wings, horizontal and vertical stabilizers. However, flight test crews aren't out searching for natural icing conditions like they did with ZA001 in mid-May, rather, before taking off from Boeing and Paine Fields earlier this week, ZA005 was fitted with simulated ice shapes. Frank Rasor, then director of flight test operations, and now Boeing Commercial Airplanes chief engineer, described the icing tests at a 2009 787 flight test briefing: Basically what we've done is been able to simulate the worst case icing conditions on the airplane with ice shapes. Flight test is all about the envelope conditions, so we will be testing within that envelope and get ice buildup on the airplane. But the ice shapes allow us to know we are at that end condition, otherwise it's very difficult to measure what's happening on the wing during the flight. It allows us to get there, know the condition, and fly there safely. Ice shapes are primarily foam-epoxy build-up and they're put on with glue and aluminum speed tape that we use in flight tests. They can be taken off. We do performance take-off and landing with those ice shapes on. JPRS _________________ JPRS |
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Effgez
Inscrit le 02/12/2008 |
# 25 août 2010 20:48 | |
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Bonsoir à tous, bonsoir Beochien, Ces méthodes de test étonnantes font-elles vraiment gagner du temps? Je reste dubitatif, car quid de la température qui peut avoir une influence non négligeable sur le comportement des parties de la voilure qui se recouvrent de glace? Je ne suis pas très convaincu par la méthode employée, comme d'avoir mis au réfrigérateur l'appareil à défaut d'utiliser un lieu soumis NATURELLEMENT aux "grands froids". Que de précautions(?) vis à vis des éléments structuraux composites de cet appareil... Je serais curieux de connaître les exigences de la FAA pour certifier cet avion avec ses nouveautés. Cordialement, Effgez 
(Dernière édition le 25 août 2010 20:52) |
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Beochien
Inscrit le 13/02/2007 |
# 25 août 2010 21:18 | |
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Merci Effgez ! La seule chose certaine est que la FAA doit s'en contenter ! sinon, Boeing ferait de vrais test ... Bon, il y a peu de chances qu'ils gélent cet hiver en clientèle, leurs avions ..; Donc un peu de temps encore ! Par contre si je crois aux essais "dynamiques" grand froid pour l'ensemble de la mécanique ... Je me demande bien ce qui peut rendre prévisible un dépôt de givre ... alors du scotch et des petites cales pour voire aux basses vitesses ... Ou faire des ronds dans le grand nord en attendant que ça givre naturellement ... bof ! Les vrais coups de givre on peut en prendre même l'été, mais vers 15 000 pieds ! A part cela, oui le happening est devenu intéressant sous d'autres cieux ... Les planètes airframers refusent obstinément de tourner à la baguette autour du soleil RR! Bizarre, et anachronique, la reprise en main sera difficile, pour le magicien ! Le trou noir du P&W GTF, exerce une attraction fatale ! Le roi n'est plus, vive le roi ! Je vais encore me faire guillotiner mon IP une semaine, quelle vie ! JPRS _________________ JPRS |
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Beochien
Inscrit le 13/02/2007 |
# 25 août 2010 22:58 | |
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Bonsoir ! Et un AD psy, pour le personnel et les cadres Boeing de Puget Sound ! Des experts sur place, pour remonter le moral et re-créer émulation et solidarité ! Et expliquer les "Bienfaits de l'externalisation " peut être au passage ?? -------------- Le Seattle PI / Bloomberg l'article !------------------- Bonne lecture, c'est long, mais bien intéressant ! http://www.bloomberg.com/news/2010-08-2 ... elays.html Boeing Adviser Will Reshape Culture Amid 787 Delays By Susanna Ray - Aug 25, 2010 10:13 PM GMT+0200 Jim Albaugh, head of Boeing Co.'s commercial unit “The technical integrity of the engineering organization is second to none, but at times people were reluctant to share some of the views and thoughts they had,” Jim Albaugh, head of Boeing Co.'s commercial unit, said in a July interview. Photographer: Andrew Harrer/Bloomberg Boeing Co., struggling with delays on the 787 Dreamliner, is working to reshape the corporate culture of its civilian aircraft unit by bringing in an adviser used after mergers a decade ago. Senn-Delaney Leadership Consulting Group LLC was hired to help employees feel engaged and end a climate in which they sometimes were reluctant to speak up or ask for help, said Jim Albaugh, chief of Seattle-based Boeing Commercial Airplanes. Deliveries of the 787 may not start until next year after setbacks to a 2008 target date for the first jetliner made mostly of plastic composites. Days before announcing the fifth delay in June 2009, Boeing had pledged the plane would fly within two weeks. Boeing said then that some people in the company had known about a structural flaw for several weeks before deciding it was serious enough to scrub the flight. “The 787 has tarnished the company’s reputation,” said Pat Shanahan, who runs Boeing Commercial production and development. “We need to establish and show people what we can do technically and be predictable about it. Jim recognizes that and wants to get us back to this hallmark, so we can be recognized as innovators and as executors.” Even as Boeing prepares the Dreamliner to reach the initial customers, the planemaker is working on modifications and replacements for its best-selling 737 and its most-profitable jet, the widebody 777. Two Years Bill Parsons, the Senn-Delaney partner in charge of the Boeing project, said redoing an organization’s culture typically takes about two years. Executives learn to foster personal accountability, openness to change, collaboration, integrity and realistic optimism, he said yesterday in an interview. A team of six Senn-Delaney consultants met with Boeing’s senior leadership group in Seattle in January, followed by seminars with the top 1,000 executives, Albaugh said. A second phase is under way to reach all 7,000 managers. The commercial workforce numbers about 64,000 people. Workshops by team leaders for rank-and-file engineers and machinists will probably begin in early 2011, said Mary Foerster, the vice president of communications and a member of Albaugh’s senior leadership team. Chicago-based Boeing declined to say how much it’s spending on the program. Different Cultures Albaugh, 60, who took his current post in September, worked with Senn-Delaney in his last position as head of defense operations to help assimilate four different cultures after Boeing bought McDonnell Douglas Corp. in 1997, Rockwell International Corp.’s space and defense business in 1996 and Hughes Space & Communications in 2000. “The technical integrity of the engineering organization is second to none, but at times people were reluctant to share some of the views and thoughts they had,” Albaugh said of the commercial unit in a July interview. “I want to take that issue off the table.” Foerster said Boeing surveyed employees earlier this year and plans a follow-up at the beginning of 2011 to examine whether the corporate culture has changed. “Some of the 787 delays have had to do with communication issues -- getting problems up the chain and all that,” said David Strauss, a UBS Securities LLC analyst in New York who has a “neutral” rating on Boeing stock. “But some of it is also that Boeing hasn’t done a great job of realigning expectations when problems have cropped up.” Delivery Plan Albaugh said last month that the first Dreamliner delivery may slip into 2011, instead of this year, because of freshly discovered flaws. There are five test models flying now, and the company has assembled about two dozen Dreamliners at its widebody jet plant near Seattle. Boeing fell 17 cents to $60.76 at 4:02 p.m. in New York Stock Exchange composite trading. The shares have gained 12 percent this year. Albaugh has said he may bring back some 787 work to Boeing employees from vendors and that the company’s engineers will be more involved with the next plane that’s built to help ease some of the supplier-driven glitches faced on the Dreamliner. He installed Mike Delaney as chief project engineer in January and shuffled more than a dozen executives to strengthen program management. He said he also requires his engineering and operations chiefs to sign off that any plan for a new or modified jet has technology that’s ready and that cost and schedule estimates are realistic. “Jim Albaugh is definitely trying to change some things there,” Strauss said. “Boeing has been pretty successful at taking people from the defense side, where they are forced by working with the government to operate under more structure, and bringing them over to the commercial side.” Boeing’s defense business handles hundreds of development programs at once. That compares with a new airliner every 10 to 15 years, Shanahan said. “Having an environment where people openly ask for assistance rather than being overly self reliant is good for finance, for human resources, for communications,” he said. “In areas where you want to improve execution, it’s even more important.” To contact the reporter on this story: Susanna Ray in Seattle at [email protected]. JPRS _________________ JPRS |
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Vector
Inscrit le 26/06/2007 |
# 25 août 2010 23:54 | |
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Beochien, ils viennent de redécouvrir la méthode Coué : répétez après moi, mon Dreamliner est bon, mon Dreamliner est beau, mon Dreamliner est solide, mon Dreamliner sera livré à temps, etc. A répéter 10 fois chaque matin et chaque soir jusqu'à la livraison à ANA... _________________ " Des trolls, n'en jetez plus, la cour est déjà pleine !" Vector |
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pascal83
Inscrit le 18/07/2007 |
# 27 août 2010 04:49 | |
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http://atwonline.com/aircraft-engines-c ... ery-delaye Vector pour la methode coué c'est ANA qui l'apprend parfaitement , ton dreamliner sera en retard et paf 3 mois, et Boeing ton dreamliner va recevoir des annulations et pouf Kenya qui risque d'annuler A+ |
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lequebecois
Inscrit le 11/02/2007 |
# 27 août 2010 05:18 | |
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Bonjour, Quelques détails supplémentaires chez Flightblogger. Le retard serait attribué aux récents problèmes de moteurs de Rolls Royce ainsi que les soucis avec le H stab d'Alenia. 2-3 mois minimum annoncé dans quelques heures. http://www.flightglobal.com/blogs/fligh ... 787-d.html et ici: http://leehamnews.wordpress.com/2010/08 ... ng-aug-27/ (Dernière édition le 27 août 2010 05:35) _________________ Le bonheur est une pause entre deux emmerdes ! Adepte de la discutaille du coin du comptoir du café de la gare |
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Beochien
Inscrit le 13/02/2007 |
# 27 août 2010 08:48 | |
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Bonjour ! Merci Cousin ! Le développement du feuilleton ! Allez, va pour les 3 Ans ! La version officielle de Boeing : (Bien vague) http://boeing.mediaroom.com/index.php?s ... ;item=1391 ---------------------------------------------- La version de Flight global ! http://www.flightglobal.com/articles/20 ... -2011.html 787 first delivery delayed to mid-Q1 2011 By Jon Ostrower Boeing has confirmed a fresh delay to its 787 programme, citing compounded issues with workmanship problems with the aircraft's Alenia Aeronautica-built horizontal stabilizer and its Rolls-Royce Trent 1000 engines. The first delivery of its 787 Dreamliner to launch customer All Nippon Airways (ANA) has now slipped to the middle of the first quarter of 2011, from the originally forecasted fourth quarter 2010. "The delivery date revision follows an assessment of the availability of an engine needed for the final phases of flight test this fall," says Boeing. While the airframer did not explicitly address the uncontained 2 August failure of a 'Package A' Trent 1000 in its announcement, the company says "the delivery date revision follows an assessment of the availability of an engine needed for the final phases of flight test this fall", indicating 'Package B' powerplants may be substituted for the early build Trent 1000s for ANA. Boeing's 787 flight test programme planned to run "another small test programme, within a flight test programme" for the Package B engines, which are slated to be test flown on the company's fourth test aircraft later this year. ZA004 is currently powered by twin Package A engines. The Package B engines include a revised six-stage low pressure turbine (LPT) design, high-aspect-ratio blades, relocation of the intermediate-pressure (IP) compressor bleed offtake ports and fan outlet guide vanes with improved aerodynamics. The revisions will also bring fuel consumption of the powerplant within 1% of the original specification. Rolls-Royce first confirmed on 16 August that a failure had occurred, saying at the time: "We do not anticipate any impact on the programme". Boeing, however, then took a more cautious approach to the issue, saying that no impact on flight testing has been incurred "to date". Boeing now says it is working with Rolls-Royce to "expedite engine availability" and adds that despite the slip in first delivery, "flight testing across the test fleet continues as planned". The airframer cautioned in June that first delivery could slip out of 2010 and "a few weeks" into 2011 after sluggish flight test instrumentation change-out and horizontal stabiliser inspections and rework slowed the flight test programme. The Boeing 787 was originally set to enter service in May 2008. --------------------- Bien on se revoit tous en 2011 pour ce sujet ! Les explications "Moteur" du PB du T1000 sont bien alambiquées ! On attends mieux ! Vu dans le buzz, que les pilotes essayeurs de B787, seraient disons "Prudents " avec leurs moteurs ... qq consignes, on ne sait jamais ! JPRS _________________ JPRS |
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