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Four-man Space X Crew Dragon spacecraft wraps up six-month stay in orbit_我的网站

A |     在全球航空兵器竞争愈发激烈的当下，印度空军的未来规划引起广泛关注。    Two NASA astronauts, a Russian cosmonaut and a United Arab Emirates astronaut undocked from the International Space Station Sunday and headed for an overnight splashdown off Florida's East Coast early Monday to wrap up a six-month stay in orbit.Strapped into their SpaceX Crew Dragon "Endeavour" spacecraft, Crew-6 commander Stephen Bowen, pilot Woody Hoburg, cosmonaut Andrey Fedyaev and UAE crewmate Sultan Alneyadi undocked from the station's forward Harmony module at 7:05 a.m. ET to kick off a 17-hour flight back to Earth.

             

"Before we get busy, we just want to say wow!" mission control radioed a few minutes before undocking. "Can you believe it's already time to leave? We can't. ... You've done an incredible job, and to say it's been a pleasure to support you guys in this mission would be an understatement."      "Thank you very much," Bowen replied. "It's been a real pleasure and an honor to be here for this expedition. We're coming up on 23 years of continuous occupation of the International Space Station, which is absolutely amazing. Just a real privilege to be a part of it."If all goes well, the Crew Dragon will execute a 16-minute de-orbit thruster firing starting at 11:24 p.m. ET. The "burn" will slow the spacecraft by 252 mph, just enough to drop it back into the lower atmosphere on a southwest-to-northeast trajectory.                 Splashdown in the Atlantic Ocean east of Jacksonville, Florida, is expected at 12:17 a.m. ET Monday."We're definitely looking forward to our return, and for me as a rookie flyer, the final part of that unique life experience (of) decelerating from 17,500 miles an hour down to hopefully a great splashdown," Hoburg said last week.A SpaceX team will be standing by to pull the spacecraft aboard a company recovery ship and assist the crew members getting out of the cabin as they begin readjusting to the unfamiliar tug of gravity after a half year in weightlessness.Before departing the space station, Bowen, a former submariner, said he most looked forward to "the nice ocean air and peaceful calm seas. That'll be really nice to get back to."                      Hoburg said he was looking forward to a "real shower." Alneyadi said he couldn't wait to rejoin friends and family, along with enjoying "a real hot cup of coffee." As for Fedyaev, "I think my dream is a bed for good sleeping. I can lay on one side. Another side. My back. Sleeping!"After initial medical checks aboard the recovery ship, all four fliers will be flown to shore by helicopter. A NASA jet then will carry them back to Houston and the Johnson Space Center for debriefing and reunions with friends and family.Left behind in orbit were three Soyuz crew members -- station commander Sergey Prokopyev, Dmitri Petelin and NASA astronaut Frank Rubio -- and four Crew Dragon fliers launched August 26 to replace Bowen and company: Crew-7 commander Jasmin Moghbeli, European Space Agency astronaut Andreas Mogensen, Japanese astronaut Satoshi Furukawa and cosmonaut Konstantin Borisov.

             

Prokopyev, Petelin and Rubio were launched to the station last September and are wrapping up a marathon 371-day mission.They originally planned to spend six months in space, but their Soyuz ferry ship was disabled by a major coolant leak last December. The Russians opted to send up a replacement spacecraft, and the crew's mission was extended an additional six months.A fresh Soyuz crew — commander Oleg Kononenko, Nikolai Chub and NASA astronaut Loral O'Hara — is scheduled for launch from the Baikonur Cosmodrome in Kazakhstan on Sept.15.Prokopyev, Petelin and Rubio will undock and return to Earth 12 days later. In so doing, Rubio will set a new U.S. record for the longest single spaceflight by an American astronaut.                      Launched atop a SpaceX Falcon 9 rocket on March 2, the Crew-6 fliers will have spent 185 days and 22 hours off planet, circling the globe 2,976 times while traveling 78.9 million miles through space. At splashdown, Bowen, the only space veteran on the crew, will have logged 227 days in space across four missions.Over the course of their mission, the Crew-6 astronauts welcomed seven visiting vehicles, including two unpiloted Cargo Dragon spacecraft, two Russian Progress supply ships, a Northrop Grumman Cygnus cargo carrier and two piloted Crew Dragons.They also carried out three spacewalks. Bowen and Hoburg ventured outside twice to install new roll-out solar blankets and Alneyadi joined Bowen for a third excursion to retrieve a failed antenna package and to carry out other maintenance."It's certainly been the experience of a lifetime, and a real honor to get to spend six months, six incredibly short-feeling months, living and working aboard this incredible orbiting outpost," Hoburg said before departing the station. "I think we got a lot done."                                 

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。然而，最近一次关于印度战斗机发展进程的访谈节目，却让这个曾经雄心壮志的军事梦显得有些不堪。刚刚退休的印度空军副参谋长纳格什·卡普尔在新德里电视台（NDTV）的节目中痛批印度斯坦航空公司（HAL），称其研发的“光辉”MK2战斗机毫无用处，不仅真相直击，也引发了关于中国和印度空军力量差距的深思。    卡普尔在节目中指出，预计到2035年，“光辉”MK2才会开始量产，而此时中国可能已经装备了第六代战斗机。根据更为乐观的估算，未来几年内，中国空军的歼-20战斗机数量将从现在的500架飙升至1000架。而对比之下，印度空军所面临的压力及中印空中力量的差距，似乎远没有得到应有的重视。        这种差距不仅体现在数量上，更在于技术的领先。以“光辉”系列战斗机的研发为例，从上世纪80年代启动的LCA计划就是个惨痛的教训。到如今“光辉”MK1战斗机的交付问题频出，正是对这一历史教训的生动映射。    虽然“光辉”MK2是被寄予厚望的一款战斗机，但卡普尔的直言无疑揭示了它的短板。这款被视为“光辉”系列最终改进版的战斗机，其研发与试飞周期依然漫长且不确定。即使在2026年首飞，形成战斗力也要到2038年，整个过程充满了变量。此外，MK2的核心技术，包括F414发动机的采购以及相关系统的集成，一直徘徊在延迟与不确定性之中。

B |     HAL屡次延迟交付的背后，反映的是印度国防工业的低效与无能。即便经历了多次的计划调整和改进，最终的成果却依旧让人失望。印度空军希望通过“光辉”MK1A来提升自身实力，但迄今为止，HAL的交付时间已经一再推迟，甚至被迫接收“半成品”，这在任何军队中都几乎是不可想象的噩梦。        万一“光辉”MK2真能按期研发完成，然而随着美国GE公司宣布将F414发动机大幅涨价，这一切似乎又添变数。当前，印度正遭遇来自美国的技术与价格的双重“痛宰”。如果说“光辉”MK2只是面临资金问题，那么未来的项目如TEDBF和AMCA则更是苦不堪言。由于在发动机选项上的局限，印度空军不得不开始寻找替代方案，然而这些方案大多在技术上没有保障，甚至连研发合同都未能落实。    例如，印度国内的“卡佛里”发动机开发延迟，以至于这一计划几乎成为了笑柄；而与法国和英国企业的合作，则面临着研发技术转让的博弈，恐怕不久的将来也难以成功落地。

C |     在这种背景下，印度空军要想重新建立自己的强大形象，必须真正面对自身存在的深层次问题。如何打破HAL的研发瓶颈与管理弊端，如何确保战斗机的性价比以及持续的技术更新，将是摆在决策者面前的重要课题。    而对于中国而言，这一情况自然形成了一种隐秘的优势。在这一问题的背后，体现出的是两国之间在国防工业独立自主、技术积累和市场运作等方面的深刻差异。        印度空军的未来，是否会在“光辉”MK2的阴影下步入困境？或许这个问题并没有简单的答案。

D | 但是，在全球科技日新月异的今天，任何国家无法在短时期内逆袭他国的技术优势，唯有正视现实，脚踏实地的推进国防建设，才能真正实现“光辉”的理想。    作为世界上最大的发展中国家，印度需要反思的不仅仅是战斗机的数量，更是整体国防工业能力的提升。只有当技术与战略同频共振，印度空军才能迎来真正的曙光。返回，查看更多。

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