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Enjoy raised initially launched as a domestic technology call has been evaluated as half success. Until the target trajectory, but a good destination because it did sikijineun mounted above the St. Mary s body in orbit. Despite the great challenges and also the rest of Shem.
In the 21 days after the free call launched 19:00 in advanced technology briefings Lim, Hye - Sook Minister of Information and Communication and the Korea Aerospace Research Institute staff are scheduled for the second launch in May next year, he vowed to complete the mission the means to solve this problem.
Why it has not mounted on satellites orbiting body simulations were analyzed because they did differ in the speed of 7.5km per second plan at the moment of climax. This is a point emphasized in a press conference hangwooyeon progress in the last 12 days ago ten days.
To narrow time ohseung hangwooyeon launcher propulsion development manager is called a satellite launch vehicle, it is the performance of the satellite launch vehicle to raise exactly the desired satellite orbit and to accurately seating the satellite at an altitude of 700km 1.5 tons must enter the 7.5km per second rate , he said.
It describes the process of catching a gradual acceleration immediately after launch. O manager to the free call is 55km altitude and speed naejwoya the initial velocity in the 1.8km, in the two-stage engine operating altitude of 252km 4.3km per second must be in and 3-step per second engine mounted to a 1.5 ton satellite 7.5km The Dada Raya, he explained.
Piwoseo not even hundreds of thousands of parts that make up any trouble for the free, however the actual Come to enjoy the launch of the call orbit rate was left as the first unfortunate one step shots.
Who are the cause of different 7.5km per second is due to three engines give you the power to write at that step is chwotgi stopped early than expected. Three engines should be fired for 521 seconds, if a 7-ton liquid engines, as planned, but ended in 475 seconds. The exact reason for this being to illuminate through data analysis.
Gojeonghwan hangwooyeon Korean projectile Development Director, we enjoy heading the three burning time when I saw watching the flight 40-50 seconds around seems to have been early terminated, did bojin is the current measurement data and download and researchers to Do Analysis , was still enough time to do so, yen, which should take a couple of days and more, he said.
The concept of dimension and fact checking thresholds mentioned some caution.
Yisangryul hangwooyeon ledger. In fact, not more important high or did lower than the altitude 700km thing, it was important to more than the orbital velocity at the target altitude and high part that will can be controlled depending on the speed, to go further up than 700km It is not, he said.
The president also said, Just one pre-flight calculations is not a lack of fuel or had a problem with the engine.
About the particularity of the 7 t Engine Development jipeot.
And Head of the seven tons engine there might think, and also see that (75 tons medium and large-class engine than) developed by completed quickly, annya difficult am one tenth of the 75 tons engine thrust 7 t Engine, internally 7 t think the engine is more difficult, said said nozzle than 75 tons situation gotta put in more severe conditions are more difficult to develop.
Following was fully tested, I guess ARM, not for the one that happened now rather than later cause other side of the engine, because the flying finish certification for now, said, but seems to be able to say look at the data in detail, he said.
7 tons engines that call for the phased development goals Nuri step of, undertaken in March 2010 succeeded in developing the development, deployment in July 2015. In February 2019 Step 2 In the case of 75-ton engine it completed the development and testing ground for a projectile uses.
Hangwooyeon has secured a reputation through nearly 100 yeohoe verification tests in various environments before applying this test-fired engines. 75-ton liquid engine with an engine of 33 groups, the experiment was a total of 184 times on the ground and simulate high-altitude environments. The cumulative burning time was carried out for 18,290 seconds. 7-ton liquid engine test in 12th whilst the engine has performed a total of 93 times, the cumulative 16,000 million 925.7 seconds.
Clustering reliability ... However Separation steadily mounting
Flying process until it reaches the 700km altitude was performed successfully Unlike feared.
In particular, it is assumed that this is the launch of a core of 75-ton engine 4GB tied (clustered) one engine working properly could reach the target altitude.
75-ton engine with 4 gigs of moving produce a total of 300 tons of thrust. 1 engine serves to boost the overall deundeunhi consists courtesy enjoy lower. At this time, the exact alignment and uniform thrust of the engine 4 based clustering technology should fit. This technical difficulty is the high part of clustering technology.
Clustering technology is required, such as engine flame heating ▲ analysis and insulation technology ▲ engine thrust between heterogeneous technologies corresponding ▲ engine Quaternary assembly, alignment, and load Burlington (orientation control) technology. It fired until it was difficult to say dwaetdago no choice but to be fully validated environmental limitations of ground tests. But up wolhi can enjoy the No. 1 car engine one step in the target altitude launch, it was to secure a reliable clustering technology also.
Stage separation process also took place, steadily mounting. After taking off one at an altitude of 59km point to should be separated from the pair 191km, 2-stage at 258km, 700km from the body simulated satellite, were carried safely in this test launch.
The Lim Minister Nuri call was normally performed, including one separate, paired separation, two separated after take-off and with each stage separation 75-ton engine 4GB gotta clustering, including the 300-ton thrust my first end flying successfully for made sure the ignition, he evaluated.
Following showed that this projectile launched a significant level of domestic technology accumulation, he added.
75-ton engine will be developed by a Korean launch vehicle since the performance advantage of clustering and improved sustainable development for large and small projectiles. Yeoseo the next pass scheduled for May 2nd to 4th launch additional examples Tagawa June, in addition to launching the state is likely to be fully utilized to improve the projectile in the future.
Additional launches a reliability level for opening a private space exploration era. But the projectile been made by the government led by the development of its technology is expected to continue to expand the universe ecosystems through the transfer of technology of the future civilian.
2025 ~ 2030, plans to expand the association and the free call technology in preparation for increased demand for small satellites under 500kg projectile into a small platform. In 2030-2040 when abundant domestic demand associated with performing various space missions, such as the large low orbit satellites, geostationary satellites are planned to ensure the large launch vehicle platform technologies.
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