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:
Jun. 07, 1994
Filed:
Apr. 14, 1992
Applicant:
Inventor:
Ronald C Stoner, Bellevue, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
244 / ;
Abstract
An improved trailing edge configuration for a transonic airfoil is disclosed. The upper and lower surfaces converge without diverging over the aft 40% of the airfoil chord, and the airfoil has significantly increasing downward curvature at the aft end. The absolute value of the negative slope of the camber typically increases by at least 50% over the aft 4% of the chord, usually increasing by a factor of about 2. The negative slope of the camber of the airfoil typically reaches at least about -0.25 at the trailing edge of the airfoil, and in preferred designs, the slope of the camber changes from about -0.175 to about -0.325 over the aft 4% of the chord.