Rotor hub fairing system for a counter-rotating, coaxial rotor system

US7530787B2 · kind B2 · utility

Assignee

• SIKORSKY AIRCRAFT CORPORATION · US

Inventors

• Fabio Bertolotti · Bad Bentheim, DE
• Mark W. Scott · Bethany, US
• Brian E. Wake · South Glastonbury, US
• T. Alan Egolf · Glastonbury, US
• Duane C. McCormick · Colchester, US
• Ebru Usta · Glastonbury, US
• Stuart S. Ochs · Manchester, US

Key dates

• Filing date: May 18, 2006
• Grant date: May 12, 2009
• Expiry date: Jul 19, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/20
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A rotor hub fairing system includes an upper hub fairing, a lower hub fairing and a shaft fairing therebetween. The rotor hub fairing system reduces the total drag on a dual, counter-rotating, coaxial rotor system. Other aerodynamic structures may be mounted to the shaft fairing, hub fairings and airframe to facilitate flow around the upper and lower hub fairings to reduce flow separation and drag.