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12 小时
on MSN
Key Milestones In The F-35 Lightning II Program
Lightning II program evolved into one of the most ambitious and complex Militaryaircraft projects in modern history.
14 小时
on MSN
DARPA展示喷气与旋翼动力融合后的VTOL X飞机风洞试验图像
在贝尔公司发布了一张新图片后,我们看到了直升机和喷气式飞机融合后可能是什么样子。 这是贝尔公司在 DARPA 的"速度与跑道独立技术"(SPRINT)项目中进行风洞试验时使用的模型。直升机等旋翼机具有在崎岖地带垂直起降的优势,但速度并不高。
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