| 摘要 |
An aircraft (10) is provided having a rotary lifting system (26) including vanes (36) supported thereon which are movable between a deployed position in which the vanes (36) provide lift to the aircraft (10) when rotated and an undeployed position in which the rotary lifting system (26) is generally in the shape of an airfoil so as to provide lift when propelled in a forward direction. A forward drive system (54) is included to generate forward thrust to propel the housing in the forward direction. The airfoil shape of the rotary lifting system (26) permits the wings (24) of conventional aircraft to be reduced or even eliminated to minimize excessive drag from wings which are larger than necessary for normal cruise on conventional aircraft. Furthermore, the engines(54) of the forward drive system are not required to be any larger or more powerful than appropriate for sustaining flight at normal cruise height.
|
