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Orbital science Antares

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Paul
Whisky Quebec

Orbital science Antares

Message par Paul le Mar 28 Oct 2014 - 23:47

Pas de chance pour les habitants de l'ISS, la fusée Antares qui devait les ravitailler a explosée 6 secondes après le décollage.

http://www.nasa.gov/mission_pages/station/structure/launch/orbital.html

la rampe de lancement gravement endommagée




Dernière édition par Paul le Mar 28 Oct 2014 - 23:56, édité 1 fois

Beochien
Whisky Charlie

Re: Orbital science Antares

Message par Beochien le Mar 28 Oct 2014 - 23:55

Je regardais ça ...

Antarés...

Un assemblage de composants Russo-Ukrainiens !

Pas de livraison pour la station !

http://www.clickorlando.com/news/nasa-rocket-explodes-shortly-after-launch/29392528

Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mar 28 Oct 2014 - 23:57

Je regardais hier
Et j'ai loupé le spectacle (triste) de ce soir

Des NK33 moteurs de la fusée lunaire N1 et si j'ai bien compris qui datent de cette époque ?


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Beochien
Whisky Charlie

Re: Orbital science Antares

Message par Beochien le Mer 29 Oct 2014 - 0:04

Mouais, drôle de mélanges, avec les réservoirs ...

http://en.wikipedia.org/wiki/Antares_%28rocket%29

The first stage uses RP-1 (kerosene) and liquid oxygen (LOX) as propellants, powering two Aerojet AJ-26 engines, which are modified Soviet-built NK-33 engines. Together they produce 3,265 kilonewtons (734,000 lbf) of thrust at sea level and 3,630 kN (816,100 lbf) in vacuum.[6] As Orbital has little experience with large liquid stages and LOX propellant, some of the Antares first stage work was contracted to the Ukrainian Yuzhnoye SDO, designers of the Zenit series.[10] The core provided by Yuzhnoye includes propellant tanks, pressurization tanks, valves, sensors, feed lines, tubing, wiring and other associated hardware.[18]
Like Zenit, the Antares vehicle has a diameter of 3.9 m (150 in) with a matching 3.9 m payload fairing.[2] The fairing is manufactured by Applied Aerospace Structures Corporation of Stockton, California, which also builds other composite structures for the vehicle, including the fairing adaptor, stage 2 motor adaptor, stage 2 interstage, payload adaptor, and avionics cylinder.[19]

Paul
Whisky Quebec

Re: Orbital science Antares

Message par Paul le Mer 29 Oct 2014 - 0:47

En vidéo


Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mer 29 Oct 2014 - 10:15

Étonnant on dirait que les moteurs se sont arrêtés net avant le destruction


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Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mer 29 Oct 2014 - 10:27



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Beochien
Whisky Charlie

Re: Orbital science Antares

Message par Beochien le Mer 29 Oct 2014 - 11:44

Mouais, et  pas encore de commentaires concernant une self destruction ...
11 secondes de vol ...et l'aire de lancement détruite ... heureusement sans victimes !

Des moteurs achetés au surplus Russe, pour ne pas dire à la casse et reconditionnés...hum !

Après l'échec Soyuz, ce n'est pas trop bon pour les fusées de l'est ... pourtant, ça marche encore plutôt bien chez eux ... alors quid du supermarché des technologies périmées, où hâtivement relancées, avec souvent des fournisseurs divisés, et chacun pour soi, entre Russie et Ukraine !

Un qui doit se marrer, c'est Space X, leur Falcon 9X avec la bagatelle de neuf moteurs (Drôle d'assemblage, côté fiabilité) semble fonctionner nettement mieux, et peut "Survivre" à la défaillance d'un moteur !

La NASA doit commencer à se poser qq questions, avec sa politique de "Supermarché" pour les lancements ... les "Soldes" Russes, hum ...

Bon, maintenant, la chasse à la "Root Cause" est ouverte !
L'étiquette "Marchandise périmée", est elle une "Root Cause" ??

--------------------------------------------
Vu sur le lien AvWeek de Poncho, j'ouvre !

NASA is requiring that Orbital use an engine in production to power the Antares, and the NK-33 has long been out of production. Aerojet previously purchased 43 of the NK-33 engines from Kuznetsov to overhaul into AJ-26s as needed for missions.
Under its CRS-1 contract with NASA, Aerojet is overhauling 20 NK-33s for use on Antares. The motors have experienced stress and corrosion, which are addressed through the overhaul process.

At issue is concern from NASA that there may not be enough suitable engines to support CRS-2, which would require 20 more.

NASA, however, has requested that Orbital seek a production source for its Antares propulsion system. Aerojet Rocketdyne President Warren Boley is in talks with Kuznetsov to begin delivering new NK-33s in late 2016, he told reporters during a June 17 roundtable at the Paris air show. The total production rate depends on the demand for Antares, but Boley says it is likely to be at least 4-6 engines annually.

The strategy is to use the new engines for deliveries to Antares and use the remaining 23 engines requiring overhaul as a “buffer” if problems arise in restarting the production process, Boley says.


Dernière édition par Beochien le Mer 29 Oct 2014 - 11:55, édité 1 fois

Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mer 29 Oct 2014 - 11:49

Y a combien de moteurs sur Soyouz ? qui reste la plus fiable ? 4 moteurs 1 par booster mais 4 chambres par booster ... 16 tuyères...
Et au décollage tu rajoutes le moteur central

Donc 20 chambres de combustions, 5 jeux de turbopompes, pleins de tuyaux
Et c'est la plus fiable !


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Beochien
Whisky Charlie

Re: Orbital science Antares

Message par Beochien le Mer 29 Oct 2014 - 12:00

Je dirais peut être plus "survivabilité" à la défaillance d'un élément, que fiabilité dans l'absolu !
Hé oui, un quad est plus survivable qu'un bi, même si il a 2x plus d'entretien et de pannes moteur !

Paul
Whisky Quebec

Re: Orbital science Antares

Message par Paul le Jeu 30 Oct 2014 - 0:41


Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mer 5 Nov 2014 - 16:43

Changement de moteur sur Antares

http://aviationweek.com/space/orbital-drops-aj-26-after-failure-looking-alternate-launcher-iss


Thompson said preliminary evidence from telemetry and debris recovered at the state-owned Antares launch complex on Wallops Island, Virginia, "strongly suggests" that one of the two AJ-26s on the vehicle failed 15 seconds after ignition. The engine had passed a hot-fire acceptance test at Stennis Space Center, where last May another AJ-26 failed when its oxygen turbopump essentially "came apart," in the words of William Gerstenmaier, associate NASA administrator for human exploration and operations.

Initial evidence also points to the turbomachinery as the site of the more recent AJ-26 failure, Thompson said. The ensuing explosion, which was triggered by range safety officers shortly before the fuel-filled vehicle fell back to Earth, caused "relatively limited damage" to the pad, and should be repairable at a "small fraction" of the time and money that went into the pad’s initial construction.

An initial assessment by NASA found the transporter/erector that lifts the Antares into the vertical position was damaged by the blast, as were fuel lines, wiring and the pad’s lightning protection system. Thompson said equipment owned by Orbital is covered by insurance.

"From a financial standpoint, the impacts to Orbital are not expected to be material on an annual basis in 2015, although the exact magnitude and timing of quarterly changes will depend on which of several specific variations on the overall plan we settle on," Thompson said. "And in any event, I do not expect any significant adverse financial impacts in 2016 or in future years."

Problème sur les turbopompes à oxygène ?

Paradoxalement, le remplaçant de l'AJ26 pourrait être un NK33 "neuf" la question se posant en Russie d'en reconstruire des neufs...

A noter qu'Orbital Science chercherait à placer son cargo sur une autres fusée (ULA, SpaceX et Arianespace) ?


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Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Lun 20 Juin 2016 - 10:39

Aller on va voir Antares 230 avec des RD181 russe cet été (juillet)
plus d'info ici (même si l'article est un peu plus vieux)

https://www.nasaspaceflight.com/2016/02/orbital-atk-summer-debut-new-antares-230/

After over one and a half years worth of work, Orbital ATK is set to return their newly revamped and improved Antares rocket to flight, following the October 2014 mishap. Orbital ATK is currently targeting a May/June 2016 launch of the OA-5 flight for Antares’ Return To Flight mission.

https://en.wikipedia.org/wiki/Antares_(rocket)

https://en.wikipedia.org/wiki/Cygnus_CRS_OA-5 pour 6 juillet donc


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Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mer 14 Sep 2016 - 12:00

Bonjour
Retour en vol finalement avec du retard
http://spacenews.com/antares-return-to-flight-now-planned-for-early-october/

Début octobre, avec un cargo CYGNUS

Petits soucis lors des tests statiques

An Antares first stage with the RD-181 engines successfully completed a static fire test on the pad at the Mid-Atlantic Regional Spaceport on Wallops Island, Virginia, in late May. NASA and Orbital ATK were planning an Aug. 22 launch of the Antares, but postponed the launch Aug. 10. At the time, the company cited both the schedule of activities on the ISS as well as “continuing processing, inspection and testing” of the Antares for the delay, saying the launch would be rescheduled for the second half of September. - See more at: http://spacenews.com/antares-return-to-flight-now-planned-for-early-october/#sthash.OSdgEzsj.dpuf



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Poncho (Admin)
Whisky Charlie

Re: Orbital science Antares

Message par Poncho (Admin) le Mar 18 Oct 2016 - 16:44



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Contenu sponsorisé

Re: Orbital science Antares

Message par Contenu sponsorisé Aujourd'hui à 11:17


    La date/heure actuelle est Mar 6 Déc 2016 - 11:17