Reasons for rejection of "progress": depressurization, the third stage of the explosion?

As is known, the space truck "Progress M-27M" has already lost a few days he will come out of orbit and burn up in the Earth's upper atmosphere. However, the reasons for rejection of the ship is still not fully elucidated, but it is vital to do in order to avoid similar cases in the future.

We now know that the telemetry with "progress" has ceased to act for fifteen seconds before the separation space truck from the carrier rocket. Experts distinguish several main reasons for failure: one of them - depressurization of "progress" as a result of improper operation of the third stage of the launch vehicle. Analysis of the parameters of the orbit of the ship shows that two steps have worked in a normal mode, and during the third stage failed.

As a result, "Progress" was not the calculated orbit, in addition, it is strongly rotates on its axis. The rotational speed - about 90 degrees per second. The main engine of the ship at the same time does not work, the reaction to commands from the Earth there.

It is worth noting that yesterday the staff of the combined space operations center at Vandenberg Air Force Base in California, USA told about the discovery of the wreckage 44 of unknown origin in orbit near the "Progress M-27M».



Photos «Roskosmos»

When analyzing the orbits of debris found, we can conclude about the explosion, which occurred in the separation of the truck from the third stage carrier rocket "Soyuz-2.1a." It is reported source of "Interfax".

"Given ... the ship" Progress "was found about 30-40 kilometers above the calculated orbit and thus strongly rotated around its axis, we can confidently say that the separation of spacecraft from the third stage of the launch vehicle that was -What kind of explosion », - commented source .

The truth is that it exploded, is unclear.

The «Roskosmos" report , that an accident does not mean the termination of the use of the carrier rocket "Soyuz" "The fact that there was an emergency situation, can not put an end to exploitation of this family of rockets. Such statistics are not positive indicators has no booster in the world: 1800 starts, reliability level and even higher level of launch vehicles of other states - 97, 3 per cent ».

The results of investigations into the causes of the accident should report before 13 May.

Source: geektimes.ru/post/249810/