Long seventh is the first Deputy to count many points
International online coverage: the long seventh rocket program from June 25 to 29th in new China's Hainan Wenchang launch timing of the launch site. Hainan Wenchang space launch site the long seventh, launch vehicle and payload combinations stood quietly on the launch Tower, under the sea breeze caresses, waiting for the launch window.
First flew in here come the long seventh rocket is of China's manned space project of launching cargo ships and the newly developed a new generation of high reliability, high security, medium launch vehicle of toxic pollution-free. Length long seventh to 53.1 m level, core diameter of 3.35 meters long in shape, with 730 tons of force, its carrying capacity exceeded the service rocket's 1.5 times. In addition, a new liquid oxygen and kerosene fuel combustion produces carbon dioxide and water, and will not cause any pollution to the environment. Deputy Commander Zhang said of the long seventh carrier rocket, seven rockets long represents the future direction of development, will become the main force of China's future space missions: "up to seven rockets are the future development direction, first thrust, another point is green. Space launch vehicle capacity on behalf of a national space capabilities, how high the rocket level, space capabilities will have much. The future (March seventh will) put satellite field, becoming the main force, take 80% 's space mission. ”
According to the Central meteorological station's latest weather forecast, from June 25 to 29th, Wenchang area is located in the precipitation zone, 25th as the drizzle turned a thunderstorm, and launching in the rain to give the rocket effect, Zhang said, everyone can get insurance. Hainan Wenchang launch site the damp climate, rainfall, in order to adapt to the environment, on the long seventh rocket waterproof design permeates every detail from the start. "Days has accidents cloud, main see weather forecast rain more big, rocket itself is can anti-rain, usually Wenchang launch site moisture gas quite badly, we found from plug place invaded has moisture, targeted of do has many improved, we later put cable, and interface are irrigation rubber, alone moisture has, put in water in bubble seven days test, are didn't problem, guarantee it in rain weather is can launches of. ”
Bear this times launches task of Hainan Wenchang launch site because close to coast, location special, except hot and humid rainfall of effect, local wind speed with from ground height of increased will gradually increased, formed shallow layer wind, "wind" is March seventh, faced of a big problem, Zhang Tao said: "in inland words no shallow layer wind, here sea level above 100-200 meters, wind also is is big, launch site measured wind reached has each seconds 20 meters above, we do has corresponding of improved, support institutions, increased has lever, Just to wind resistance, transitions now rocket launches, can withstand 20 meters per second, 8, 9, Typhoon. ”
And now the rest of the long March series of active "brotherhood" than the long seventh carrier rocket has a "unique skills", is before the ignition, can do about 50 seconds of the test, check the parameters and achieve better engine performance. Zhang reminded, although full of "warm-up time", but in view of seven rocket new Lox/kerosene engine long special operation mode, from the end of the countdown, rocket firing, leaving the launch pad took off the long seventh rocket "slower". "After ignition from 01 commander issued a password, rockets to 7.3-7.4 seconds to take off, because there are effects of engine working process, and the establishment of the effects of stress, engine fire to create thrust takes 6.3 seconds, 1 second after the establishment of thrust, reached more than 600 tons in order to truly take off leaving the launch pad. ”
Except on "starting reaction speed" has psychological prepared zhiwai, March seventh, rocket also will in Visual effect Shang to everyone brings novelty of feel: due to new of rocket used new of environmental fuel replaced off has original of toxic advance agent, in launches moments of burning flame Shang will has obviously difference: "General rocket advance agent fuel original partial II methyl hydrazine and four oxidation II nitrogen of flame yellow, and new engine used liquid oxygen and kerosene, color partial blue, looks will more bright, burning product is carbon dioxide added water, are is environmental of. ”
In General, a launch rocket system success lies mainly in the rocket's takeoff and grade separation of the satellite and the rocket are normal, whether within the specified height, time and inclination, the payload into orbit, compared with the long seventh rocket flight tasks bear a heavier responsibility. Zhang Tao said: "from rocket angle, to 2 level star arrows separation, Rectifier cover open and combination body separation, even rocket launches success, but long seven first fly task also including top some effective load, future new manned space of shrink than returns class, combination body and rocket separation this is will insurance, addition is returns class returns, variable rail, security landing, only is last success".
According to the plan, long seventh rocket launch on June 25 to the 29th time, do the first flight test mission. Eight years of sword, long seventh finally will usher in the soaring "opener." Zhang admitted that waiting for ignition of the mood is like sending their children to college entrance examination, excited little nervous: "feeling very excited, looking forward to, and a little bit nervous, that's for sure. Want kids to get a good result, but the work done in the usual, do final Assembly at home, testing, experimental works, to be launched when Frank Dang, no regrets, the rocket will succeed. ”
(Editors: Liu Cheng UN649)
2016-06-25 09:13:01
China News Network
长征七号即将首发 副总指挥细数诸多看点
国际在线报道：长征七号运载火箭计划6月25日至29日在中国新建成的海南文昌发射场择机发射。在海南文昌航天发射场，长征七号运载火箭与有效载荷组合体静静的矗立在发射塔架上，在海风轻抚下，静待发射窗口到来。
即将在这里迎来首飞的长征七号运载火箭是是中国载人航天工程为发射货运飞船而全新研制的新一代高可靠、高安全，无毒无污染的中型运载火箭。长征七号以长度53.1米、芯级直径3.35米的修长身形，拥有着730吨的强大推力，其运载能力超过了现役火箭的1.5倍。此外，新的液氧和煤油燃料燃烧产生的二氧化碳和水，不会对环境造成任何污染。长征七号运载火箭副总指挥 张涛介绍说，长七火箭代表了未来发展方向，将成为中国未来航天发射任务的主力军：“长七火箭是未来发展方向，首先推力大， 另外一点就是环保。航天运载火箭的能力代表了一个国家航天能力，运载火箭水平有多高，航天能力就有多大。未来(长征七号将)投入卫星发射的主战场，成为主力军，承担我国80%的航天发射任务。”
根据中央气象台的最新天气预报，6月25日至29日，文昌地区位于降雨带当中，25日为小雨转雷阵雨，而对于雨中发射带给火箭的影响，张涛表示，大家大可吃个定心丸儿。海南文昌发射场气候潮湿，降水量大，为了适应这种环境，对长征七号火箭的防水设计从一开始就渗透到了每一个细节。“天有不测风云，主要看看天气预报雨多大，火箭本身是可以防中雨，平时文昌发射场湿气气相当厉害，我们发现从插头地方侵入了潮气，针对性的做了很多改进，我们后来把电缆、接口都灌胶，别说防潮了，放在水里泡七天测试，都没问题，保证它在中雨天气是可以发射的。”
承担本次发射任务的海南文昌发射场因为紧邻海岸，地理位置特殊，除了湿热降雨的影响，当地风速随着距地面高度的增加会逐渐加大，形成浅层风，“防风”也是长征七号面临的一大难题，张涛说：“在内陆的话没有浅层风，这里海平面以上100-200米，风力还是很大，发射场实测风力达到了每秒20米以上，我们做了相应的改进，支撑机构，增加了拉杆，就是为了抗风，现在火箭转场发射，可以抵御每秒20米，8、9级台风。”
与目前现役的其他长征系列“兄弟”相比，长征七号运载火箭有一招“独门绝技”，就是在正式点火之前，可以做50秒左右的试车，检查各项参数，让发动机性能达到更佳。张涛特别提醒，虽然有充分的“热身时间”，但是鉴于长七火箭全新液氧煤油发动机的特殊运行方式，从倒计时结束、火箭点火，到离开发射台起飞，长征七号火箭会“慢半拍”。“从01指挥员发出点火口令之后，火箭要7.3-7.4秒才能起飞，因为这里边有发动机工作流程的影响，和建立压力的影响，发动机要建立推力需要6.3秒见火，1秒之后建立推力，达到600吨以上才能真正离开发射台起飞。”
除了对“起跑反应速度”有所心理准备之外，长征七号运载火箭还会在视觉效果上给大家带来新奇的感受：由于全新的火箭采用新的环保燃料替换掉了原来的有毒推进剂，在发射瞬间的燃烧火焰上会有明显区别：“常规火箭推进剂燃料原来偏二甲肼和四氧化二氮的火焰发黄，而新发动机采用液氧和煤油，颜色偏蓝，看起来会更亮，燃烧产物是二氧化碳加水，都是环保的。”
一般来说，一次发射任务对于火箭系统是否成功的标准主要在于火箭的起飞和二级星箭分离是否正常，是否能在规定高度、时间和倾角内，将载荷送入轨道，而相比之下，长征七号运载火箭的首飞任务承担着更重的责任。张涛说：“从火箭角度，到2级星箭分离，整流罩打开和组合体分离，就算火箭发射成功，但是长七首飞任务还包括上边有的有效载荷，未来新一代载人航天的缩比返回舱，组合体和火箭分离这是必保，另外就是返回舱返回，变轨，安全着陆，才算最后成功”。
按照计划，长征七号运载火箭将在6月25日至29日择机发射，执行首次飞行试验任务。八年磨一剑，长征七号终于将迎来一飞冲天的“揭幕战”。张涛坦言，等待点火的心情就像送自己的孩子去高考，很激动，小紧张：“心情很激动，很期待，也有点小紧张，这是肯定的。都希望孩子考个好成绩，但是工作做在平时，做在家里的总装，测试，实验等工作，才能做到发射的时候坦坦荡荡、无怨无悔，火箭就必然成功。”
(责任编辑：刘盛钱 UN649)
2016-06-25 09:13:01
中国新闻网