The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2011
Filed:
Aug. 03, 2006
Ashok K. Agnihotri, Southlake, TX (US);
Jimmy Charles Narramore, Bedford, TX (US);
John J. Schillings, Fort Worth, TX (US);
Ashok K. Agnihotri, Southlake, TX (US);
Jimmy Charles Narramore, Bedford, TX (US);
John J. Schillings, Fort Worth, TX (US);
Bell Helicopter Textron Inc., Hurst, TX (US);
Abstract
One embodiment of the present invention is a main rotor helicopter blade for generating higher lift with less drag and delaying stall at high Mach numbers. A cross-section of this blade includes aft camber. The difference between a chord line of the cross-section and a camber line of the cross-section increases from a leading edge of the cross-section to a maximum between a trailing edge of the cross-section and a midpoint of the chord line and decreases to the trailing edge producing the aft camber of the blade. The aft camber generates higher lift with less drag and delays stall at high Mach numbers.