| 摘要 |
PURPOSE: To improve the lift and drag obtained by a rotating balloon to obtain good flight characteristics by locating a gondola near the balloon surface and making the gondola top surface matched with the balloon surface. CONSTITUTION: An aircraft comprises a balloon, a central gondola 36, an arm 32 extending therefrom, a shaft 30 for rotatably connecting the balloon with the top end of the arm 32, and a gas turbine engine 40. The balloon has cables 12b forming a series of squares on the balloon surface in addition to peripheral cables 12a, the gondola 36 is disposed very close to the balloon and has a recessed part to the rear of the gondola top behind a standard horizontal shaft 16 to thereby improve the blanking effect. Such constitution restricts the air flow between the balloon and the gondola 36, this reduces the drag caused on the balloon surface while the lift increases with an increase in the balloon rotation speed, thus improving the flight characteristics. |
