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I doubt it has any significant impact on lowering drag. I can say that based on design principles utilized in aircraft.Look at many commercial subsonic transports like the Boeing 747. Despite the fact that it can travel over 600 miles per hour, it was designed with a fairly rounded nose. To the contrary, a supersonic aircraft like the F-16 has a slender pointy nose. What drives these different design philosophies?What needs to be said is that there is not just one kind of "drag". Two of importance are friction drag and wave drag. Friction drag is, of course, drag that is caused by friction between the air and the surface of the aircraft. The ideal way to reduce friction drag is to reduce an aircraft's surface area. The shape of minimum area is a sphere. This is why subsonic aircraft have rounded noses; to reduce surface area and therefore friction drag.Supersonic aircraft have a type of drag that subsonic aircraft do not have to deal with: wave drag. This is caused when shockwaves form across the aircraft's surface when travelling faster than sound. The shockwaves drain the aircraft's energy, which increases drag. The best way to reduce wave drag is to make the aircraft as narrow and pointy as possible (on both ends, not just the nose!) This reduces wave drag. The increased surface area of a narrow shape will increase friction drag, but wave drag can be a much more powerful form of drag so it tends to be the focus for supersonic designs.Looking at the hummingbird, which is VERY subsonic, I'll have to say that the beak isn't designed to reduce drag at all.
Nah, I wasn't trying to suggest that you believed hummingbirds were supersonic.I guess my post was just a really long way of saying that the pointy bill doesn't reduce drag.