公开(公告)号：US09937999B2

公开(公告)日：2018-04-10

申请号：US14727045

申请日：2015-06-01

Applicant: Northrop Grumman Systems Corporation

Inventor： Barnaby S. Wainfan ,  Stephen D. Johnson

IPC: B64C27/50 ,  F03D1/06 ,  B64C11/28 ,  B64C11/04 ,  B64C27/46 ,  B64C27/473

CPC classification number: B64C11/28 ,  B64C11/04 ,  B64C27/46 ,  B64C27/50 ,  B64C2027/4736

Abstract: A propeller which can be folded and stowed in compact form and then deployed for powered flight is disclosed. The deployable propeller has two or more blades, and each blade is composed of multiple segments which are disengaged when stowed and then interlock when deployed to form an efficient blade. The segmented deployable propeller retains all effective area to the spinner radius.

公开(公告)号：US09975633B1

公开(公告)日：2018-05-22

申请号：US15151287

申请日：2016-05-10

Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION

Inventor： Stephen D. Johnson ,  Barnaby S. Wainfan

IPC: B64C39/02 ,  B64C3/00 ,  B64C7/02 ,  B64C11/00

CPC classification number: B64C39/024 ,  B64C3/00 ,  B64C7/02 ,  B64C11/001 ,  B64C2201/104 ,  B64C2201/105 ,  B64C2201/108 ,  B64C2201/162 ,  B64C2201/20

Abstract: A ducted fan UAV that can be collapsed into a stowed configuration and then deployed for flight by, for example, inflating the duct to a deployed configuration. The UAV includes a plurality of rotor blades, a plurality of struts and a plurality of control vanes each being pivotally mounted to a center body by a hinge so that the rotor blades, the struts and the control vanes can be folded into the stowed configuration to be substantially parallel to the center body and be unfolded into the deployed configuration to be substantially perpendicular to the center body. The UAV also includes a pressurization system providing a pressurant to a chamber within the duct so as to inflate the duct and cause the struts, the rotor blades and the control vanes to move from the stowed configuration to the deployed configuration.