On a cold March night last year in Portsmouth, England, an entirely new type of aircraft flew for the first time, along a dimly lit 120-meter corridor in a cavernous building once used to build minesweepers for the Royal Navy. • This is the Phoenix, an uncrewed blimp that has no engines but propels itself forward by varying its buoyancy and its orientation. The prototype measures 15 meters in length, 10.5 meters in wingspan, and when fully loaded weighs 150 kilograms (330 pounds). It flew over the full length of the building, each flight requiring it to undulate up and down about five times.

中文翻译：

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这艘飞艇仅靠浮力飞行凤凰将上下运动转化为推力

去年 3 月一个寒冷的夜晚，在英国朴茨茅斯，一架全新的飞机第一次沿着一条 120 米长的昏暗走廊飞行，该走廊曾经是为皇家海军建造扫雷舰的海绵状建筑。• 这是凤凰号，一种无人飞艇，没有引擎，但通过改变浮力和方向来推动自己前进。原型机长 15 米，翼展 10.5 米，满载时重 150 公斤（330 磅）。它飞过建筑物的整个长度，每次飞行都需要它上下波动大约五次。