公开(公告)号：US20210354814A1

公开(公告)日：2021-11-18

申请号：US17229831

申请日：2021-04-13

Applicant: Bell Helicopter Textron Inc.

Inventor： George Matthew Thompson ,  Jonathan Andrew Knoll ,  Robert Glenn Vaughn ,  William Anthony Amante

IPC: B64C27/473

Abstract: A rotor system is provided in one example embodiment and may include a rotor duct; at least one rotor blade, wherein the at least one rotor blade comprises a tip end; and a multi-material tip extension affixed at the tip end of the at least one rotor blade, wherein the multi-material tip extension comprises an inboard portion fabricated from a first material and an outboard portion fabricated from a second material, wherein the second material is different than the first material.

公开(公告)号：US11286037B2

公开(公告)日：2022-03-29

申请号：US16159208

申请日：2018-10-12

Applicant: Bell Helicopter Textron Inc.

Inventor： Robert Glenn Vaughn ,  Michael J. Ryan ,  Brent Randal Achttien ,  Kirk L. Groninga ,  Daniel B. Robertson ,  Matthew Edward Louis

IPC: B64C11/00 ,  B64C11/18 ,  B29C39/10 ,  B64C29/00 ,  F16J15/3288 ,  B29L31/08

Abstract: A rotor system is provided in one example embodiment and may include a rotor duct; at least one rotor blade, wherein the at least one rotor blade comprises a tip end; and a tip extension affixed at the tip end of the at least one rotor blade, wherein the tip extension comprises a plurality of flexible elements and the rotor blade has a fixed extended length based on the tip extension. The tip extension may provide a clearance distance between the tip extension and the rotor duct.

公开(公告)号：US11286036B2

公开(公告)日：2022-03-29

申请号：US16159178

申请日：2018-10-12

Applicant: Bell Helicopter Textron Inc.

Inventor： Kirk L. Groninga ,  Daniel B. Robertson ,  Matthew Edward Louis ,  Robert Glenn Vaughn ,  Michael J. Ryan ,  Brent Randal Achttien

IPC: B64C11/00 ,  B29C39/18 ,  B64C11/18 ,  B64C29/00 ,  B29L31/08 ,  F16J15/3288

Abstract: A rotor system is provided in one example embodiment and may include a rotor duct; at least one rotor blade, wherein the at least one rotor blade comprises a tip end; and a tip extension affixed at the tip end of the at least one rotor blade, wherein the tip extension is comprised, at least in part, of a flexible material and the rotor blade has a fixed extended length based on the tip extension. The tip extension may provide a clearance distance between the tip extension and the rotor duct.