Lancement Proton-M / Yamal-402 - 8 décembre 2012

10/01/2013
"Yamal-402" left to the customer

Satellite "Yamal-402", manufactured by the French company Thales Alenia Space for the "Gazprom Space Systems' (SCS), has successfully passed the orbital flight tests and is now fully under the control of Russian specialists ComNews reports referring to the press service of Thales Alenia Space. "Yamal-402" is now located at 54.9 degrees. E, was successfully flight-tested and ready to go.

"On January 8, 2013 satellite" Yamal-402 "is completely under the control of specialists GCS. Flight tests of the satellite were successful - all systems are checked and tested" - confirmed in a conversation with a reporter ComNews Deputy Director of Marketing and Business Planning GCS Igor Kot.

montmein69 a écrit:Plutôt une bonne nouvelle que cette récupération du satellite.

Ce qu'on attend c'est une conclusion définitive sur l e dysfonctionnement du Briz-M (la turbo-pompe défaillante c'est confirmé ?).
Et que la chaine de fabrication soit enfin sécurisée pour que cet étage soit à nouveau considéré comme fiable. Visiblement c'est pas simple de remettre de l'ordre dans la maison :bounce1:
D'autant que certains responsables pourraient être les fournisseurs de matériel en amont (inconstance de la qualité des alliages, fiabilité douteuse des composants électroniques dans les conditions de l'espace, etc ...)

01/12/2013 Completed determine the causes of an emergency in the derivation of the orbit satellite "Yamal-402"

Interdepartmental committee responsible for investigating the causes of abnormal operation booster "Briz-M" for satellites to the orbit of "Yamal-402", has completed its work, the company International Launch Services (ILS).

The Commission submitted its report to the Centre Khrunichev specialists acting developer and manufacturer of boosters such as "Breeze-M". After the Russian side checks the text of the report for the state secret, it will be forwarded to the ILS, the report says.

Launch rocket "Proton-M" with the upper stage "Briz-M" and the satellite "Yamal-402" was held on the night of December 9 from the Baikonur Cosmodrome. The satellite failed to cleanly bring to geosynchronous transfer orbit because the booster worked for four minutes less than the set time. With its own power "Yamal" satellite in four stages dovyveli into geostationary orbit, it has passed inspection and is ready for use, according to RIA Novosti.

01/11/2013 Start "Protons" resume before the end of the 1st quarter - source

Roscosmos commission responsible for investigating failure booster "Briz-M" for satellites to the orbit of "Yamal-402", has developed a series of measures to improve the reliability of the "breeze", said the agency "Interfax-Kazakhstan" a source at the Baikonur Cosmodrome.

According to the source, the implementation of these measures require additional inspection and testing of individual elements and components of the upper stage, and it may require four to six weeks.

"Work on the preparation of rockets" Proton-M "and boosters" Briz-M "for launch will resume only after the implementation of the observations and recommendations in this regard, missile launching" Proton "from Baikonur could be resumed only at the end of the first, and perhaps be early in the second quarter of 2013, "- he said.

International Launch Services (ILS) has formed a Failure Review Oversight Board (FROB) which will review the Commission’s final report and corrective action plan, in accordance with U.S. and Russian government export control regulations. The FROB will begin in Moscow on January 30thand consists of ILS customers, industry subject experts, and insurance industry representatives. The FROB will provide an independent review of the investigation, root cause and corrective actions required prior to return to commercial flight. After the conclusion of the FROB, the FROB report will be briefed to ILS customers and the launch insurance industry.

montmein69 a écrit:Avec une reprise prévisible des vols au mieux, pas avant le début du second trimestre 2013, les clients d'ILS vont "tordre le nez".
Y-a t'il dans les contrats des clauses de report "coopératifs" vers d'autres lanceurs ? (Sea Launch, Land Launch, Arianespace ?)

In the meantime, industry sources posting on the web forum of the Novosti Kosmonavtiki magazine, reported that a prolonged expose to the sunlight between the third and fourth firing of the Briz-M's engine affected viscosity of the propellant and caused cavitation during the fourth firing. As a result, a ball-bearing assembly in the engine broke and a the propellant line was cut off, leading to a premature shutdown of the engine. To correct the problem, engineers planned to increase the amount of pressurization in the propellant system of the rocket stage and to schedule coasting periods between engine firings to give more time for the cooling off of the propellant

patchfree a écrit: affecté la viscosoté du carburant et provoqué un phénomène de cavitation lors du 4ème fonctionnement

montmein69 a écrit:La cavitation, c'est lorsqu'un problème de pression survient dans la canalisation d'alimentation et que le carburant passe de l'état liquide à l'état gazeux.

01/24/2013 "SOGAZ" will pay for the "Yamal-402"

Insurance company "SOGAZ" compensate damage caused by problems with the output of the Russian satellite "Yamal-402" into orbit. The extent of damage will be calculated at the end of January.
As the reporter ComNews spokesman "SOGAZ" insured event occurred under the insurance contract with OAO "Gazprom Space Systems' (SCS). "We are currently working to establish the circumstances of the event and clarify the extent of damage," - said the source.
In turn, the director of claims settlement, Vladimir Kozlov, explained that working meetings were held with representatives of the insured and the insurance broker. "They discussed issues related to the current situation with the testing and acceptance of the satellite, determine the cause of the anomaly, made a preliminary calculation of the service life of the insured to reduce the spacecraft, the procedure for further action to settle the loss," - said Kozlov.
According to him, in the last days of January (approximately 28-30 numbers) will meet in Paris with foreign reinsurance partners. It will also be attended by representatives of the manufacturer of the spacecraft - the company Thales Alenia Space. During the meeting, "is scheduled to make a presentation on the current state of affairs, and to agree on a number of basic calculations, which later will be based determination of the amount of material damage," - said Vladimir Kozlov.

01/29/2013 First run of "Proton" after the emergency situation in December will be a Mexican satellite

The first after the emergency situation in the derivation of the orbit satellite "Yamal-402" launched a carrier rocket "Proton-M" will be with the Mexican telecommunications satellite SatMex-8, told RIA Novosti the Khrunichev Center (the manufacturer of rockets "Proton" and boosters "Breeze-M").

"The first in 2013 after the resumption of starts to" Proton "will go spacecraft SatMex-8, which failed to start in December 2012 due to a temporary embargo on missile launching this type in connection with the inter-ministerial committee. Might start" Proton "can be implemented by the end of February," - said the source.

INTERNATIONAL LAUNCH SERVICES (ILS) FAILURE REVIEW OVERSIGHT BOARD (FROB) CONCLUDES THE YAMAL 402 PROTON LAUNCH ANOMALY INVESTIGATON

February 12, 2013- The ILS Failure Review Oversight Board (FROB) concluded its review on February 7, concurring on the most probable root cause and the associated corrective action plan of the December 8, 2012 anomaly of the Yamal 402 Proton launch The FROB analyzed the findings and recommendations of the Russian working group, which included participation from experts from TsNIIMash (Central Scientific Research Institute of Machine Building), M.V. Keldysh Research Center and Khrunichev State Research and Space Production Center (Khrunichev).

The members of the FROB agreed with the findings of the Russian investigation that the most probable root cause of the failure was due to a combination of adverse conditions which affected the operation of the Breeze M main engine during the startup of the 3rd burn causing damage to a bearing on the oxidizer side of the turbo pump. This ultimately resulted in the failure of the bearing during the 4th burn and caused the 4th burn of the Breeze M to end about four minutes early, with subsequent separation of the spacecraft. The spacecraft, built by Thales Alenia Space for Russian satellite operator, Gazprom Space Systems, was successfully maneuvered to its orbital position and was declared fully operational on January 8th 2013 after completing its on orbit tests.

“My sincere appreciation goes out to our customers, insurance underwriters and independent subject matter experts for their thorough and diligent participation in the ILS FROB process. We thank our customers for their support as ILS Proton proceeds towards return to flight,” said ILS Vice President of Programs and Operations, John Palmé.

The ILS Proton return to flight mission will be the Satmex 8 satellite for Satélites Mexicanos, S.A. de C.V. (Satmex) next month. Scheduling of this mission and of the remainder of the ILS Proton near term manifest for 2013 is currently being determined.

International Launch Services Issues Additional Details on the Yamal 402 Proton Launch Anomaly Cause and Corrective Actions

February 14, 2013 - International Launch Services (ILS) has issued additional details regarding the most probable root cause and corrective actions presented to the ILS Failure Review Oversight Board (FROB) concerning the Yamal 402 Proton launch anomaly which occurred on December 8, 2012.

The members of the FROB agreed with the findings of the Russian investigation that the most probable cause of the Yamal 402 Proton launch anomaly was due to a combination of adverse conditions which affected the operation of the Breeze M main engine during the startup of the 3rd burn.

The combination of adverse conditions were predominantly thermal in nature and affected the conditions at the oxidizer inlet line to the Breeze M main engine prior to the 3rd burn ignition and resulted in a large volume of oxidizer gas (rather than liquid oxidizer) at the engine inlet, exceeding the Breeze M main engine specifications. The volume of gas was ingested by the Breeze M turbopump at the start of the 3rd burn, leading to over-speed of the oxidizer turbopump bearing without the cooling normally supplied by liquid oxidizer. The over-speed damaged the bearing, which eventually led to the premature shutdown of the fourth burn. The adverse thermal conditions were due to higher than previously recorded propellant temperatures at liftoff combined with higher than previously recorded thermal soak-back of engine heat to the Breeze M prior to the 3rd burn.

Several corrective actions will be implemented, and include management of both satellite and Breeze M thermal requirements to ensure adequate margin to prevent future recurrence of this anomaly. No Breeze M hardware modifications are required.

The ILS Proton return to flight mission will be the Satmex 8 satellite for Satélites Mexicanos, S.A. de C.V. (Satmex) on March 27 (March 26 EDT) from the Baikonur Cosmodrome in Kazakhstan. The corrective actions required by the FROB to prevent future recurrence of the anomaly have been started and are currently on schedule to support the new launch date. Scheduling of the remainder of the ILS Proton near term manifest for 2013 is currently being determined.

patchfree a écrit:

International Launch Services Issues Additional Details on the Yamal 402 Proton Launch Anomaly Cause and Corrective Actions


The combination of adverse conditions were predominantly thermal in nature and affected the conditions at the oxidizer inlet line to the Breeze M main engine prior to the 3rd burn ignition and resulted in a large volume of oxidizer gas (rather than liquid oxidizer) at the engine inlet, exceeding the Breeze M main engine specifications.

Several corrective actions will be implemented, and include management of both satellite and Breeze M thermal requirements to ensure
adequate margin to prevent future recurrence of this anomaly. No Breeze M hardware modifications are required.