Blunt-leading-edge raked wingtips

In a high subsonic Mach number airplane, characterized by the combination of

• opposed main wings each including an outboard end;
• and
• a pair of raked wingtips, each wingtip having a root end connected to a main wing outboard end;
• each raked wingtip further including a plurality of local airfoils each having a leading-edge nose radius, a chord, and a maximum thickness;
• the span of each raked wingtip being at least 4% of the total semispan;
• wherein the ratio of local maximum thickness-to-chord is greater than the ratio ot root maximum thickness-to-chord for the majority of the wingtip span, and wherein from the wingtip root end to the wingtip outboard end the wingtip local nose radii increase in a transition region and then generally decrease thereafter;
• each raked wingtip having a camber that remains constant or decreases in the outboard direction and a trailing edge bluntness that remains constant or decreases in the outboard direction.

A raked wingtip comprising:

• an inboard end, an outboard end, and a transition region located at the inboard end and adapted to connect to the outboard end of a high subsonic Mach number swept main wing;
• the wingtip further including a plurality of local airfoils each having a maximum thickness and a chord;
• wherein the ratio of wingtip local maximum thickness-to-chord is greater than about 0.12 over the majority of the wingtip span;
• the thickness-to-chord ratio generally increasing in the outboard direction for the majority of the wingtip span;
• and
• wherein from the raked wingtip inboard end to the raked wingtip outboard end the wingtip local nose radii increase in a transition region and then generally decrease thereafter;
• the raked wingtip having a camber that remains constant or decreases in the outboard direction and a trailing edge bluntness that remains constant or decreases in the outboard direction.

A raked wingtip comprising:

• a generally planar member having a leading edge, a trailing edge, a chord, and a leading-edge nose radius;
• the ratio of leading,-edge nose radius-to-chord being greater than about 1.5% over the majority of the span of the raked wingtip;
• the wingtip local nose radii increasing in a transition region and then generally decrease thereafter in the outboard direction;
• the raked wingtip having a camber that remains constant or decreases in the outboard direction and a trailing edge bluntness that remains constant or decreases in the outboard direction.