9 votes
Accepted

Are the aerodynamic benefits of winglets similar for both powered airplanes and gliders?

Technically yes, but you have to consider that the benefits are weighted toward higher AOAs and lower indicated airspeeds, where the vortice flow is strong enough for the energy extraction benefit to ...
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  • 103k
6 votes

Are the aerodynamic benefits of winglets similar for both powered airplanes and gliders?

Perhaps a better question might be swept wings vs straight wings. Gliders gain efficiency through straight high Aspect Ratio wings that have relatively weak wingtip vortices, especially near the best ...
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5 votes
Accepted

What causes air flow towards fuselage near the winglet?

Suction does. Air flow follows pressure gradients, and the lift-creating suction over the upper wing pulls in more air, not only from ahead of the airplane (which explains the induced angle of attack),...
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2 votes

Do F-4 Phantom II pilots actually fold the wings?

On our RF-4C's the pilot could not fold the wings the crew chief had to do it. It was part of the 25 hour check to fold them and inspect and lube them.
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1 vote

Are the aerodynamic benefits of winglets similar for both powered airplanes and gliders?

The thing to understand about winglets is that all they do is increase the effective aspect ratio of the wing. This has the effect of increasing the Oswald efficiency and reducing induced drag. On an ...
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1 vote

Where can I place an engine in a twist morphing wing?

Don't Twist, morphing sounds torsionally flexible. Add mass to a soft spring and you get all kinds of resonances and eigenmodes. Better put the engine mass to a stiff and strong structure that can ...
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