No, that is not the advantage of high aspect ratio wings. If the wing model extends all the way to the wind tunnel wall on each side, there are no wingtips and there is no tip vortex, no tip loss. The circulation and the lift are the same at each cross section all the way across the span. There is still downwash and there is still induced drag. The wing is flying "uphill", metaphorically speaking, relative to the deflected air stream. The flow pattern will be the same at each cross section and so this is called two dimensional flow. If the wing does not extend to the wall and there are wing tips, there will be tip vortices at each tip. There will be loss of circulation and lift, greatest near the tips, but extending inward in diminishing degree. There will be some loss of circulation and lift even at the center of the wing. The flow pattern will not be the same at each cross section, there will be flow across each cross section and so this is known as three dimensional flow; you have air movement in three dimensions. The center cross section of the three dimensional wing will resemble two dimensional flow; there is no cross flow. A high aspect ratio wing has more area in the center which resembles two dimensional flow. Losses at the tip do not affect the center as much as on a low aspect ratio wing. The circulation and lift in the center region of the higher aspect ratio wing will be higher than at center region of the lower aspect ratio wing. The pressure difference will be higher in the center region of the higher aspect ratio wing than at center region of the lower aspect ratio wing. The tip losses affect a smaller portion of the area of the higher aspect ratio wing.
Thank you for taking the time to make this available to all of us. This is a truly remarkable piece of footage and a real gem!
Das ist wirklich ein Kleinod, die ganze Serie ist wunderbar.
Deserve million views
Can’t believe I’m getting lessons from the man himself…
One of the best explanation
Gotta shout out B Sport for bringing me here
No, that is not the advantage of high aspect ratio wings.
If the wing model extends all the way to the wind tunnel wall on each side, there are no wingtips and there is no tip vortex, no tip loss. The circulation and the lift are the same at each cross section all the way across the span. There is still downwash and there is still induced drag. The wing is flying "uphill", metaphorically speaking, relative to the deflected air stream. The flow pattern will be the same at each cross section and so this is called two dimensional flow.
If the wing does not extend to the wall and there are wing tips, there will be tip vortices at each tip. There will be loss of circulation and lift, greatest near the tips, but extending inward in diminishing degree. There will be some loss of circulation and lift even at the center of the wing. The flow pattern will not be the same at each cross section, there will be flow across each cross section and so this is known as three dimensional flow; you have air movement in three dimensions.
The center cross section of the three dimensional wing will resemble two dimensional flow; there is no cross flow. A high aspect ratio wing has more area in the center which resembles two dimensional flow. Losses at the tip do not affect the center as much as on a low aspect ratio wing. The circulation and lift in the center region of the higher aspect ratio wing will be higher than at center region of the lower aspect ratio wing. The pressure difference will be higher in the center region of the higher aspect ratio wing than at center region of the lower aspect ratio wing. The tip losses affect a smaller portion of the area of the higher aspect ratio wing.
aeromodeller1 Which is basically what Lippisch said.
Kindly explain this with related pictures and videos..want to learn.
uff those vortices
wow 😍