Invention Grant
- Patent Title: Counter-torque device for a helicopter
- Patent Title (中): 直升机的反扭矩装置
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Application No.: US13568262Application Date: 2012-08-07
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Publication No.: US08640984B2Publication Date: 2014-02-04
- Inventor: John M. Kebrle , James R. Andrews , Justin Daw , Jim Hurdle , Paul Sherrill , Jimmy C. Narramore , Sidney Xue , Charles Hollimon , Dudley Smith , Bryce Docker , John T. Brieger
- Applicant: John M. Kebrle , James R. Andrews , Justin Daw , Jim Hurdle , Paul Sherrill , Jimmy C. Narramore , Sidney Xue , Charles Hollimon , Dudley Smith , Bryce Docker , John T. Brieger
- Applicant Address: US TX Hurst
- Assignee: Bell Helicopter Textron Inc.
- Current Assignee: Bell Helicopter Textron Inc.
- Current Assignee Address: US TX Hurst
- Agency: Pillsbury Winthrop Shaw Pittman LLP
- Main IPC: B64C27/82
- IPC: B64C27/82

Abstract:
A ducted fan for a helicopter includes a transverse duct and a counter-torque device supported within the duct. The counter-torque device includes a rotor rotatably mounted within the duct and a stator fixedly mounted within the duct downstream from the rotor. The rotor includes a rotor hub having a rotor axis, and rotor blades extending from the hub. The Rotor blades have a modulated angular distribution about the rotor axis. The stator includes a stator hub, and a plurality of stator vanes distributed around the stator hub. The stator vanes are angularly modulated around the stator hub.
Public/Granted literature
- US20130032664A1 COUNTER-TORQUE DEVICE FOR A HELICOPTER Public/Granted day:2013-02-07
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