Do winglets decrease ground effect?

[shdw]

I am not sure that the reduction in ground effect is the primary objective of winglet.

And you'd be right. The reduction in induced drag only causes the aircraft to be more susceptible to floating during landing. Hardly can call that beneficial.

What winglets also do is help reduce tip vortices. Something that, in some cases, is necessary to keep spacing between heavies reasonable. By far their real benefit lies in the improvements to L/D ratio at high cruise speeds. Instead of regurgitate it, here: Understanding Winglets.

It's a PDF download, no author is given just a mention of using ideas from Fred George. As a brief background, Fred was (maybe still is, not sure) the chief test pilot and writer for BCA magazine. The article, at a glance, appears to be on target.

 

[dasleben]

Yes, because it is the winglet causing the float, not Hack McHackerton at the controls...

I never said I was a good pilot, only that I make a mean coffee.

 

[Roger Roger]

I never said I was a good pilot, only that I make a mean coffee.

And really, when you get down to it, what else is there to this job?

 

[Hellboy888]

And you'd be right. The reduction in induced drag only causes the aircraft to be more susceptible to floating during landing. Hardly can call that beneficial.

What winglets also do is help reduce tip vortices. Something that, in some cases, is necessary to keep spacing between heavies reasonable. By far their real benefit lies in the improvements to L/D ratio at high cruise speeds. Instead of regurgitate it, here: Understanding Winglets.

It's a PDF download, no author is given just a mention of using ideas from Fred George. As a brief background, Fred was (maybe still is, not sure) the chief test pilot and writer for BCA magazine. The article, at a glance, appears to be on target.

Even the author of that article is not certain about this fact.
Only mean or knowing is simulation via research.

 

[shdw]

Even the author of that article is not certain about this fact.

About what fact? I sent this link to illustrate the primary purpose of winglet design.

 

[dasleben]

I fly jets.

 

[seagull]

Listen to Shdw, the reduction in vorticies is a byproduct of what winglets do, it is NOT how they work, it is NOT how they reduce drag, it is just a visible RESULT of those things.