Federal Space Agency (Roscosmos) announced the successful launch of the carrier rocket “Proton-M”: this is the first accident since the May launch of the rocket type.
Run “Proton -M “with the upper stage” Breeze-M “Implemented from the launch complex site 200 Baikonur cosmodrome on August 28 at 14:44 Moscow time. On board was placed telecommunications satellites Inmarsat-5F3.
« After the regular separation from the third stage of the launch vehicle orbital unit as part of the upper stage” Briz-M “and the spacecraft Inmarsat-5F3 continues Autonomous Flight », – said the Russian Space Agency.
It should be noted that the previous satellite Inmarsat (5F2) for global mobile satellite operator Inmarsat (UK) has been successfully delivered to orbit launch vehicle” Proton M “in February this year.
The next after that start,” Proton-M “took place on March 19, 2015 On: if the rocket was successfully launched from the communication satellite” Express AM7 “.
However, then the accident happened. May 16, 2015 after the launch of “Proton-M” with the Mexican communication satellite Mexsat-1 in the estimated time has not occurred separation of the spacecraft from the third stage of the launch vehicle. As a result, the satellite was lost. The cause of the disaster called the failure of the steering motor third stage due to increased vibronagruzok caused by the increase in the imbalance of the rotor turbopump unit.
After the May crash booster undergone modernization, which includes the replacement of the material of the rotor shaft of the turbopump unit, completion techniques rotor balancing, etc.
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