Invention Grant
- Patent Title: Rotor assembly with high lock-number blades
-
Application No.: US15398919Application Date: 2017-01-05
-
Publication No.: US10457388B2Publication Date: 2019-10-29
- Inventor: Gary Miller , Frank B. Stamps
- Applicant: Bell Helicopter Textron, Inc.
- Applicant Address: US TX Fort Worth
- Assignee: Bell Helicopter Textron, Inc.
- Current Assignee: Bell Helicopter Textron, Inc.
- Current Assignee Address: US TX Fort Worth
- Agency: Lightfoot & Alford PLLC
- Main IPC: B64C27/35
- IPC: B64C27/35 ; B64C27/48 ; B64C27/33 ; B64C27/54 ; B64C27/51

Abstract:
An aircraft rotor assembly has a central yoke and a plurality of rotor blades coupled to the yoke for rotation with the yoke about an axis, each blade having a Lock number of approximately 5 or greater. A lead-lag pivot for each blade is a radial distance from the axis and allows for in-plane lead-lag motion of the associated blade relative to the yoke, each pivot allowing for in-plane motion from a neutral position of at least 1 degree in each of the lead and lag directions. Lead and lag motion of each blade is opposed by a biasing force that biases the associated blade toward the neutral position, and the biasing force is selected to achieve a first in-plane frequency of greater than 1/rev for each blade.
Public/Granted literature
- US20190061929A9 Rotor Assembly with High Lock-Number Blades Public/Granted day:2019-02-28
Information query