公开(公告)号：US20190144107A1

公开(公告)日：2019-05-16

申请号：US15811002

申请日：2017-11-13

Applicant: Bell Helicopter Textron Inc.

Inventor： Chandrashekar Rudraswamy

IPC: B64C27/52 ,  B64C27/28 ,  B64C27/26

Abstract: A tiltrotor assembly has a central hub with a plurality of rotor blades extending therefrom and is configured to rotate about a mast axis to generate lift in a hover position. The central hub is configured to rotate about a tilt axis between the hover position and a forward-flight position such that rotation about the mast axis generates forward thrust. The central hub is surrounded by a segmented duct that includes a thin rotatable inner ring and a wide fixed outer ring. The inner ring is configured to rotate with the central hub about the tilt axis leaving the wide outer ring in a generally horizontal position.

公开(公告)号：US10988245B2

公开(公告)日：2021-04-27

申请号：US15811002

申请日：2017-11-13

Applicant: Bell Helicopter Textron Inc.

Inventor： Chandrashekar Rudraswamy

IPC: B64C27/52 ,  B64C29/00 ,  B64C27/26 ,  B64C27/28 ,  B64C11/00 ,  B64C3/32

Abstract: A tiltrotor assembly has a central hub with a plurality of rotor blades extending therefrom and is configured to rotate about a mast axis to generate lift in a hover position. The central hub is configured to rotate about a tilt axis between the hover position and a forward-flight position such that rotation about the mast axis generates forward thrust. The central hub is surrounded by a segmented duct that includes a thin rotatable inner ring and a wide fixed outer ring. The inner ring is configured to rotate with the central hub about the tilt axis leaving the wide outer ring in a generally horizontal position.