Full success! Launch was at 12:11:04 UTC.http://9ifly.spacety.com/forum.php?mod=redirect&goto=findpost&ptid=69004&pid=752050Lin Xiaoyi30 seconds ago, from the space enthusiast network super talk"Success! At 20:11:04 p.m. on July 9, the Asia-Pacific 6D satellite was launched by the CZ-3B F69 carrier rocket at the Xichang Satellite Launch Center, and after nearly half an hour's flight, the Asia-Pacific 6D satellite was accurately put into geosynchronous transfer orbit (GTO), the star-arrow separation normal, solar sails once unfolded normally. In the next few days, the satellite will also complete a number of orbit ingorbit, and solar sails for the second time, antenna expansion, after the completion of the in-orbit test, the final fixed point at 134 degrees E service orbit.
The launch was a complete success
The Asia-Pacific 6D satellite weighs 5,550 kilograms, which is overweight for the rocket's capacity.The Long March 3B launch vehicle for this mission has a geosynchronous transfer orbit (GTO) launch capacity of 5,500 kg, which is more than the satellite's 50 kg less weight. The weight of the satellite cannot be changed, only to allow the rocket to meet the launch requirements by reducing its own weight without losing performance.For the Long March 3B rocket, which has a takeoff mass of more than 450 tons, 50 kilograms may seem insignificant. However, every gram of weight on the spacecraft has to be carefully calculated, and it is no more important for it to meet the "slimming" requirements than for us to lose weight on a regular basis. Easy. The rocket development team of the First Academy of Aerospace Science and Technology had to "subtract" step by step.In the past, the third stage of the Long March 3B rocket was equipped with five titanium alloy replenishment cylinders. After analysis, the designers reduced one cylinder to meet the strength and usage requirements, and then used composite materials to make the rocket. Replaced the titanium alloy material. This reduced the overall weight of the rocket by 20 kg.The weight of the three-stage tanks has a 1:1 effect on rocket capacity, meaning that a 1 kg reduction in tank weight will result in a 1 kg reduction in rocket capacity. The capacity can be increased by 1 kg. The designers optimized the process and structure of the rocket storage tank with the premise of maintaining the carrying capacity, and selected a more The light and thin wall plate makes the weight of the storage box drop by 10 kg.In recent years, in order to improve the adaptability of the rocket, the Long March 3B has installed a total of four layers of ring-shaped anti-swaying plates in the three-stage hydrogen tank, which can meet the needs of all the Orbital mission requirements. Designers have reduced two layers of anti-sway plates and another 20 kilograms for the rocket, based on the actual orbital requirements of the Asia-Pacific 6D satellite."With these improvements, the rocket's carrying capacity has been made to meet the Asia-Pacific 6D satellite carrying needs. This is unprecedented for the Long San B rocket," Zhang Yipu, overall deputy chief designer of the First Dean Sanjia series of rockets, said.
