SpaceX successfully recovered at sea: a great victory for the helplessness behind

After four attempts after recovery of sea rocket a child fails, SpaceX company in at 4:52 on April 9, successfully recovered a sub-stage rocket Falcon -9 in the Atlantic Ocean, this is the company following the December 2015 the successful recovery of a child in the land after the rocket, the first time the Rockets recovered at sea. So, why the Falcons -9 rockets were recovered at sea? Sea Recovery of difficulty? SpaceX successfully recovered at sea: a great victory for the helplessness behind Ideal is full Achieve reusable launch vehicle has been the dream of space flight, because until today, so the spacecraft into space costs remain the entire space activities cost a great piece. While in launch costs rocket, the rocket propellant general proportion of small, emission costs include high-tech rocket itself, especially the engine, guidance and control systems and other components. If we can achieve a reusable launch vehicle, after flying just like aircraft that fill up again every time you take to the skies again, it can significantly reduce the total cost of space launch, thus providing more opportunities for the development of space missions. Musk according to the statement by repeating the use of technology to reduce launch costs about $ 6 million, is currently the company SpaceX launch offer 1/10. SpaceX successfully recovered at sea: a great victory for the helplessness behind Reality a little skinny SpaceX's reusable launch vehicle, the use of stents and floating landing platform Technical Approach recovered rocket first stage, to achieve part of the recovery, it should be said to be more realistic alternative technical approach, but there are still enormous challenges. From the placement accuracy, the current space shuttle is only so precise control of the whole process of return of spacecraft to achieve precise landing, various human manned spacecraft also can not do this, the general forecast error in placement or even 10 km km magnitude, which is mainly determined by the whereabouts of the process control mode. Since the first stage of the rocket Falcon -9 not like the space shuttle, as with a lot of gas-operated control surfaces, so its control is limited, in part delivered to the designated height and speed for more than two to complete the main task, a child's flight parameters deviate slightly difficult to return to the vicinity of a predetermined impact point. Rocket engines are very sophisticated high-tech products, although the thrust is large, but in fact, the limited capacity of impact-resistant in a fall, so at the moment splashed sea is subjected to a severe test, in order to meet this demand require additional technical measures. Time use and multiple use of the heat capacity of the engine combustion chamber, the engine nozzle throat erosion requirements are quite different, the requirements for reliability index is quite different. Rocket engines are very sophisticated high-tech products, although the thrust is large, but in fact, the limited capacity of impact-resistant in a fall, so at the moment of landing to be severely tested in order to meet this demand needs to take additional technical measures . Time use and multiple use of the heat capacity of the engine combustion chamber, the engine nozzle throat erosion requirements are quite different, the requirements for reliability index is quite different. SpaceX successfully recovered at sea: a great victory for the helplessness behind Sea recovered helpless In a sense, SpaceX companies to take the initiative to slow down, vertical landing of space shuttle boosters way is to avoid the recovery process brought about the complexity and high cost. Falcon rocket -9 recycled manner, both in offshore platform or on land, sea erosion problem does not exist in the engine and the rocket body, maintaining recovered relatively simple, from a technical approach itself is conducive to cost control . -9 Falcon rocket taking sea recovery mode is actually no choice, mainly by the energy characteristics of rocket decision. Each sub-class launch vehicle after completing their missions and isolated due to inertia will continue to move upward movement, if unchecked, will eventually fall from the launch point further afield. Therefore, the most economical way to recycle propellant rocket in the vicinity of the child's placement natural recovery. SpaceX successfully recovered at sea: a great victory for the helplessness behind In addition to the United States on the west coast of Vandenberg Air Force Base launch sun-synchronous orbit satellites, most of which require rocket launch from the east coast to the east, which determines the best way to save energy recovery in a child's natural fall launch vehicle the direction of the track set recovery platform, so it can only be recovered at sea in the Atlantic Ocean. But offshore recovery requirements are more demanding: rocket shape elongated body, if recovered by way of vertical, landing on the attitude of the strict requirements, and as offshore platforms can not do much recovered, so the rocket recovery process position control also proposed strict requirements, coupled with the impact of factors such as weather and waves, making the sea more complicated recovery, these are offshore recovery relatively low success rate of the main reasons. Of course, if the rocket carrying its maximum load carrying capacity than the much smaller, a lot of residual propellant rocket, you can use more propellant after separating a child changes its velocity direction, it is possible to return to the launch site nearby, the use of land recycling. Despite failure after many setbacks, SpaceX company still did it! Using reusable technology is the only way to reduce the cost of space launch, but in the end there is a difference which technology is more reasonable way. The success of the recycling company SpaceX is of great significance, how to develop its follow-up worthy of our attention.Frozen Games - Juegos de Frozen - Jogos de Frozen - Permainan Frozen - Игры Холодное сердце
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