Dual rotor, rotary wing aircraft

US10822076B2 · kind B2 · utility

Assignee

• SIKORSKY AIRCRAFT CORPORATION · US

Inventors

• David H. Hunter · Cheshire, US
• Justin Thomas · New Haven, US
• Robert D. Beatty · Trumbull, US
• Nicholas Charles Tuozzo · Hamden, US
• Thomas Alan Egolf · Stratford, US
• Peter F. Lorber · Coventry, US
• Robert C. Moffitt · Seymour, US
• Shawn Westfall · Stratford, US

Key dates

• Filing date: Sep 30, 2015
• Grant date: Nov 3, 2020
• Expiry date: Sep 19, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C2027/8281
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A main rotor blade assembly for a rotary wing aircraft is provided including a main rotor blade root region, a main rotor blade inboard region arranged outboard of said main rotor blade root region, a main rotor blade main region arranged outboard of said main rotor blade inboard region, and a main rotor blade tip region arranged outboard of said main rotor blade main region. At least one of chord, twist, sweep, airfoil shape, and thickness/chord of the main rotor blade assembly has been optimized to achieve balanced high speed forward flight and hover relative to both efficiency and high thrust capability.