Boeing 787
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pascal83
Inscrit le 18/07/2007 |
# 3 avril 2008 08:42 | |
Non on attends avec impatience la mise sous tension de la cellule pour une nouvelle annonce de retard + 1 ans par exemple.  |
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elmer
Inscrit le 27/09/2005 |
# 3 avril 2008 10:31 | |
C'est quoi ces soi-disant passionnés d'aéronautique qui souhaitent des retards ? des échecs ?  Personnellement, en tant que passager, je souhaite pouvoir voyager dans un 787 le plus tôt possible, ne serait-ce que pour les progrès au niveau de la pressurisation et du taux d'hygrométrie de la cabine, et pour les hublots plus grands par rapport à ce que l'on connait maintenant. |
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pascal83
Inscrit le 18/07/2007 |
# 3 avril 2008 10:52 | |
Je chambre désolé Elmer  |
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elmer
Inscrit le 27/09/2005 |
# 3 avril 2008 11:40 | |
| Peut-être, mais à la longue, ça devient lourd... | ||
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TRIM2
Inscrit le 29/04/2007 |
# 3 avril 2008 11:41 | |
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Bonjour à tous A propos de la mise sous tension de la cellule, 'power on', Il faut se souvenir que le B787 possederait plusieurs réseaux : 1- Triphasé, Alternatif fréquence variable, 230 Volts 75 KvA 2 - Monophasé, continu, 540 Volts 150 KvA Cela en vol normal. Un réseau comprenant un chargeur de batteries, Un ensemble de batteries Lithium- Ion ( 28 volts) lequel alimente un genérateur statique qui délivre aussi 540 Volts continus; Ce circuit entraine à l'arrêt les alternateurs/démarreurs afin de mettre en route les turbofans. Une fois ceux ci en route les mémes alternateurs/démarreurs fournissent les différentes tensions décrites au début, ainsi qur la recharge des batteries LI_ION.. Donc il n'y a pas un 'power on' mais une succession de mises sous tension des nombreux équipements ( alternatif ou continu) un par un, en attendant le vrai 'power on' avec des courants fournis par les alternateurs/démarreurs entrainés par les turbofans.. C'est un résumé. Il est certain qu'une partie des équipements a été testée en fournissant le courant adéquat. Pour que le 'power on' final soit effectué, il faut que l'avion tienne sur ses trains et que les moteurs tournent. Mais il y a des étapes intermédiares, freinées par ce qui est actuellement le principal souci ( poids cellule, amarrage barrels ). Il se peut aussi que des soucis dans l'organisation des circuits electriques soient à l'étude..( refroidissement..) Cordialement TRIM2 (Message édité par TRIM2 le 03/04/2008 11h45) |
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Beochien
Inscrit le 13/02/2007 |
# 4 avril 2008 19:55 | |
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Bonjour Juste péché chez Airliners 2 comments sur le 787 Quote Captain X Boeing has a bad habit of throwing immature technology into products, mainly for the market appeal, only to suffer the traditional consequences later. A March 2008 audit of the 5-year old $160B Boeing Future Combat System (Army) by the GAO, found just 2 of the 44 critical technologies baselined by Boeing for the program in 2003 to be mature enough to deploy. Boeing promised in 2003 that the maturity would grow to the required Technology Readiness Level (TRL) 6 by 2006. "The program began with major assumptions that entirely new technologies would somehow materialize during development, the report said. Only two of FCS' 44 critical technologies have reached the level of maturity they should have had when the program began. Those technologies were in development long before the FCS program began. "Other technologies are now rated less mature, projected maturity dates have slipped and others have shown little advancement over the years," the report said. Eight of the critical technologies either have not progressed at all or were deemed less mature than when the program began five years ago, according to GAO." The 787 is suffering from the same cultural issue, and certification will prove to be illusive. This is why Boeing can't point their finger at any one problem today. It's an onion. Compounding the technology issues is the equally ignorant risk taking on the business plan side. Neither were really necessary. It is impossible to predict with any certainty when certification will be achieved due to all the unknowns and the history of Boeing's own botched forecasts. My parametric model's bell curve is suggesting the highest probabilty is now in early 2011. Pas vraiment optimiste le CaptainX ! Et Quote Stitch You are correct, AirNZ, to note that just because the 787 has 900 orders to date is not a guarantee the program will be successful. While highly unlikely, there is a chance the plane will never enter service because something will happen that results in the program being scrapped. However, if that happens, Boeing will exit the commercial aviation business (and perhaps business, period, though the government may ensure IDS survives for national security reasons) and at that point, well it doesn't matter if the 787 sold one copy or one million. However, the 787 has 900 orders and continues to secure new orders (where things like compensation payments would not be applicable in "sweetening" the deal) as well as large follow-on orders (no matter how "sweet" the incentive, an airline still has to have faith in the plane to order two dozen more of them). And existing customers, while disappointed in the delays and rightfully planning to take Boeing to task over it, continue to stand by their order even though there are excellent alternatives available now (the A330 and 777) and excellent alternatives on the horizon (the A350). Des américains, et pas des anti Boeing ... un peu scaring sur les bords quand même ! je crois que l'annonce attendue sera pour un retard total de 18-24 mois, ils ne peuvent pas se permettre d'annoncer 3 mois de plus et de recommencer en Juin et en Septembre !! Il faut savoir sauter le pas et boire son verre jusqu'à la lie ...Pauvre Carson qui n'y est pas pour grand chose, il est arrivé alors que le 787 était lancé déjà ! Il doit l'avoir mauvaise !! Pendant que Mullaly fume son Havane tranquille dans un hamac entre 2 palmiers ! l'annonce Boeing je l'attendais today ... sinon vendredi prochain .... JPRS Paris (Message édité par Beochien le 04/04/2008 19h57) _________________ JPRS |
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Beochien
Inscrit le 13/02/2007 |
# 5 avril 2008 00:19 | |
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Bonne nuit John Leahy ne se prive pas d'une petite pique, bon après les couleuvres du A380, c'est pas moi qui le lui reprocherai !! Une analyse Business Week http://www.businessweek.com/bwdaily/dnf ... 948354.htm ---------- Extraits ------ Exploiting the Delay A number of analysts revised their view after ILFC Chairman Steven Udvar-Hazy told an analyst conference last month that he didn't expect the first delivery until September, 2009, instead of early in the first quarter, as Boeing had last promised. Boeing's competitor, meanwhile, is playing up the possibility of a 787 delay. John Leahy, chief of sales at Airbus, said in an interview on Apr. 3 at company headquarters in Toulouse, France, that several airlines have told him they were contacted by Boeing in recent days, and were told that Boeing will announce the expected 787 delay in the next week. Additional slippage, by Leahy's calculations, means "up to a two-year delay" in the program. "They'll be lucky if they get any planes out the door in 2009," he says. Leahy wouldn't mind some vindication (SI, je crois!!)  . Airbus, after all, got a lot of heat for the two-year delay of its super jumbo A380 plane. It has had better luck with its answer to the Dreamliner, the A350, although it was slow to settle on its design. That put it a few years behind Boeing in the sale of the new generation of widebodies (BusinessWeek.com, 1/16/08).JPRS Paris _________________ JPRS |
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Beochien
Inscrit le 13/02/2007 |
# 7 avril 2008 19:18 | |
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Bonjour Le couplet (Compil) de Fleetbuzz sur les retards 787, rien de bien nouveau ... Boeing pourrait enfin parler demain ?? moi j'attends Vendredi http://www.fleetbuzzeditorial.com/2008/ ... g-preview/ JPRS Paris _________________ JPRS |
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pascal83
Inscrit le 18/07/2007 |
# 7 avril 2008 21:04 | |
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http://biz.yahoo.com/prnews/080407/aqm535.html?.v=1 CHICAGO, le 7 avril 2008 / PRNewswire-FirstCall / - Boeing (NYSE: BA - News) sera diffusée sur le Web un exposé de 787 Dreamliner, le mercredi 9 avril à 11h00 heure de l'Est. Boeing Commercial Airplanes President and Chief Executive Officer Scott Carson and Vice President/General Manager, 787 Program, Pat Shanahan will discuss progress to date on the new commercial airplane. Boeing Commercial Airplanes président et chef de la direction Scott Carson et vice-président / directeur général, Programme 787, Pat Shanahan porteront sur les progrès accomplis à ce jour sur le nouvel avion commercial. |
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Beochien
Inscrit le 13/02/2007 |
# 7 avril 2008 21:21 | |
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Ca fait vers les 16.00 h si j'ai bien compris ?? _________________ JPRS |
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xmadflyer
Inscrit le 02/03/2008 |
# 7 avril 2008 22:10 | |
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Bonsoir Beochien, 11H eastern time, soit 17H00 fuseau Paris, je crois... Je me sers de ceci en general : http://www.worldtimeserver.com/ Saludos (Message édité par xmadflyer le 07/04/2008 22h12) |
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Beochien
Inscrit le 13/02/2007 |
# 7 avril 2008 22:34 | |
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Merci Xmad , j'étais resté à l'heure d'hiver _________________ JPRS |
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Beochien
Inscrit le 13/02/2007 |
# 7 avril 2008 22:58 | |
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Bonsoir Quand les PB de sous traitance, ou même du donneur d'ordres, sont de plus en plus complexe et que le staff du sous traitant ou du client, n'est plus à la hauteur pour xx raisons ... Conséquences ! In a Mar. 28 question-and-answer memo to employees, Boeing said it needed to act to ensure "that GA provides timely, high-quality deliveries to our final assembly facility." It rejected the assertion that its intervention in South Carolina was a "tacit admission that outsourcing so much work on the 787 was a mistake." "We believe in the business model we established on this program" that has helped lead to more than 850 orders, the company said. "Clearly, we are learning lessons as we go and we are making decisions to adjust to them." That answer doesn't satisfy Everett's workers, who are accustomed to receiving bare fuselage sections from outside suppliers on other programs but undertaking the buildup of those sections and the complex task of integrating systems themselves. "They need to revisit their model and figure out what are their core functions," says Ray Goforth, executive director of the Society of Professional Engineering Employees in Aerospace. "One of the lessons they learned is that they haven't retained talent here to know if that work is being done properly. They went too lean on their staffing models to even be able to adequately supervise this assemblier model." The issue of experience is a broader one than the 787's troubles in an industry heavily dependent on employees who are close to retirement. "The Baby Boomers have the intellectual capital to pull a total project together," says Goforth. "We can teach people how to weld things, [but] it's not the discrete task, it's the integration of the task that makes the workforce value-added." http://www.aviationweek.com/aw/generic/ ... %20Network JPRS Paris ! (Message édité par Beochien le 07/04/2008 23h00) _________________ JPRS |
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lequebecois
Inscrit le 11/02/2007 |
# 8 avril 2008 02:40 | |
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Selon James Wallace, Boeing devrait annoncer au moins 6 mois de retard supplémentaires... http://blog.seattlepi.nwsource.com/aero ... 135969.asp _________________ 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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checklist
Inscrit le 02/12/2007 |
# 8 avril 2008 03:44 | |
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- (Message édité par checklist le 08/04/2008 03h47) _________________ Qui pêche par orgueuil, cour à sa perte ... |
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