The wrong "Bernoulli" explanation in Sci. American for April 2005

[Tom Sanderson]

> Flowwise Circulation is a pure mathematical model, for correcting the
> Potential flow field!
>
> It愀 very easy to see that in real flight there is no flowwise
> circulation around the wing, only the spanwise circulation in
> connection with the downwash!

What do you call air moving in circles? Most people call it circulation.

In real flight there is flowwise circulation above and below the wing...not
around it.

>> As a side benefit, you can fit more fuel in there and use deeper chords,
>> but
>> it's not strictly necessary...the 747 doesn't have a supercritical wing
>> and
>> does just fine.
>
> Because the "old" B747-400 does not have the new supercritical wing,
> it愀 draglosses is some 15-20 % higher than the new 787.

The 747-400 is more than 15-20% larger than the 787...of course its drag
losses are higher.

Tom.