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Arianespace Rejects Russia Offer to Fix Seam Rupture in Fregat Booster
by Staff Writers
Moscow (Sputnik) Feb 05, 2019

Illustration of the Fregat upper stage booster.

Arianespace has not accepted the offer by the Russian Lavochkin Research and Production Association to "patch up" the rupture in the pipeline that supplies helium to fuel tanks of the Fregat booster on the Soyuz-ST carrier rocket at the space center, a source in the rocket and space industry told Sputnik on Monday.

The booster is scheduled to put the first test satellites of the UK OneWeb satellite constellation into orbit. Last week, sources in Russia's space industry told Sputnik that the seam rupture in a pipeline (that supplies helium to fuel tanks) of the Fregat booster on the Soyuz-ST carrier rocket had been detected during pre-launch preparations.

"Arianespace company has not accepted the offer by the Russian Lavochkin Research and Production Association, which is the producer of the Fregat booster, to repair the unsealed welding seam by putting a bandage on it. We are currently negotiating the possibility to carry out the welding works at the space center, but Arianespace opposes this idea as it believes that repairs should be carried out at the factory", the source said.

The source explained that European experts were in doubt about the possibility to carry out the repair works at the space center, as they believed that this might do damage to the reliability of the booster.

The source added that he did not rule out that the Russian manufacturer and Arianespace would not reach a compromise. In this case, it will be necessary to return Fregat to Russia for repair, which means that the "cracked" Fregat booster will have to be replaced with a new one.

According to another Sputnik source, the launch of OneWeb satellites, which is scheduled for February 20, has been postponed to 27 February.

OneWeb plans to create a constellation of satellites that will provide broadband Internet access to users around the world fully covering the Earth's surface. OneWeb's investors include Virgin Group, SoftBank, Airbus, Qualcomm and Coca-Cola.

The Soyuz-ST is a version of the three-stage Soyuz-2 rocket with a Fregat booster, adapted for launches in high heat and humidity climate prevalent in Kourou.

Source: Sputnik News


Related Links
Arianespace
Rocket Science News at Space-Travel.Com


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Roscosmos Singles Out Design of Carrier Rocket for Lunar Missions
Moscow (Sputnik) Feb 04, 2019
Russian State Space Corporation Roscosmos has finally approved the design of the Yenisei super-heavy class launch vehicle for future lunar missions, it will use the RD-180 and RD-171MB engines, a Russian space industry source told Sputnik. "Only one version of the super-heavy class rocket is being considered now. It has been proposed by the Samara-based Progress rocket space center and comprises six side boosters with RD-171MB engines and a central core stage powered by an RD-180 engine. Other pro ... read more

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