Foam reverses aerodynamic lift
 

I hope this may be of interest:
"Physicists in France have discovered that when a foam flows over an aerofoil, the resulting force is exerted downwards rather than upwards" - see Foam result surprises scientists.

It made me wonder if there might be effects from other types of fluid that are encountered more frequently than foam - e.g. clouds. Anyone know if research has been done in this area?

It blows a hole in the equation P.V=K.

It doesn't add up, if you'll pardon the pun. Using their figures, I make the aerofoil about 4.5cm chord length. Let's see them try it on a proper aerofoil.

Simple! Spray foam on underside of wing, and get even MORE lift!!

Prof BN2A.

:8

I wonder if they also tried the aerofoil at higher angles of attack and if they found the same result?

In any case this discovery could have a profound effect on future discussions regarding the behavior of aerofoil sections in beer froth!

Does that mean that for all of those years that we sprayed Water Methanol into the engines that we should have been spraying it on the under-side of the wing instead?:E

Regards,

Old Smokey

pressure to publish
 

Maybe under the intense pressure to publish new discoveries they forgot to add some positive angle of attack?