|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/023D; 244/0125; 244/0230C; 180/117|
|§371/§102 date||20081104 (20081104)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 13 인용 특허 : 83|
A vehicle, particularly a VTOL air vehicle, includes a duct carried by the vehicle frame with the longitudinal axis of the duct perpendicular to the longitudinal axis of the vehicle frame; a propeller rotatably mounted within the duct about the longitudinal axis of the duct to force an ambient fluid therethrough from its inlet at the upper end of the duct through its exit at the lower end of the duct, and thereby to produce an upward lift force applied to the vehicle, and a plurality of spaced vanes mounted to and across the inlet and exit ends of the du...
What is claimed is: 1. A method of improving aerodynamic flow through a ducted fan of a Vertical Take Off and Landing (VTOL) vehicle when the VTOL vehicle is in proximity to the ground, the ducted fan comprising an open-ended duct, having an inlet end and an outlet end; a propeller mounted within said duct between said inlet and outlet ends; and a first plurality of vanes extending across the inlet end of the duct; the method comprising:(a) adding a second plurality of vanes across the outlet end of the duct, said second plurality of vanes being pivotal...