Soundwaves Boost Wing Lift

On Mon, 22 Aug 2005 00:53:26 -0700, wrote
(in article .com):


As with sound canceling headphones, this would only work locally - as in
needing different cancelation waveforms for each side of the head. The film
would have to be a checkerboard of detectors and generators.

-- Charlie Springer

As with sound canceling headphones, this would only work locally - as in
needing different cancelation waveforms for each side of the head. The
film
would have to be a checkerboard of detectors and generators.


This has been modified for your right ear.

As with sound canceling headphones, this would only work locally - as in
needing different cancelation waveforms for each side of the head. The
film
would have to be a checkerboard of detectors and generators.

-- Charlie Springer

This has been modified for your left ear.

No reason why not a piezoelectric material will both tramsmit and
receive. In fact intelligent skin is very biological. It has evolved
independently many times. Dolphins and sharks have intelligent skin.
So, presumably, did Ichtheosaurs, although skin is not in the fossil
record.

On Tue, 23 Aug 2005 03:15:40 -0700, wrote
(in article .com):

No reason why not a piezoelectric material will both tramsmit and
receive. In fact intelligent skin is very biological. It has evolved
independently many times. Dolphins and sharks have intelligent skin.
So, presumably, did Ichtheosaurs, although skin is not in the fossil
record.


Sport SONAR pucks work that way, but they can't send and receive at the same
time.

-- Charlie Springer

True. However we can divide our material up. There is clearly a lot of
room for research. To illustrate the potential benefits of research let
me make a biological statement. Water is 1000 times denser than air (at
2,000m altitude). Dolphins and sharks swim at up to 70km/h. Putting
ther same energy in in air would = 700km/hr. Just a bit slower than a
passenger jet.

The Dolphin/Shark at pek energy will probably rougly equal a modern
250cc motobike engine. This is typical of microlight propulsion.
700km/h - Think about it.

I also feel that aircraft of all types would benefit, not just
microlights although for reasons of cost they make the best
experimental machimes. An airliner would have a lower optimal operating
altitude as induced drag (caused by the fact that the plane has got to
impart 9.81M m/s momentum downwards to fly. Induced drag goes down
with air mass swept.

Makes one wonder what the technique could do for prop performance. Any
thoughts?
" wrote in message
ups.com...
Here's some news that recently came out:

http://www.newscientist.com/article.ns?id=dn7867

http://abc.net.au/science/news/stories/s1439827.htm

Apparently, soundwaves can help airflow stay near the wing and increase
lift. This can help smaller aircraft to avoid stalling at lower
airspeeds. Is this a technology that could be usefully applied to
existing small aircraft? Or would it require some totally new design
thinking?

In article ,
"Jim Rodgers" wrote:

Makes one wonder what the technique could do for prop performance. Any
thoughts?
" wrote in message
ups.com...
Here's some news that recently came out:

http://www.newscientist.com/article.ns?id=dn7867

http://abc.net.au/science/news/stories/s1439827.htm

Apparently, soundwaves can help airflow stay near the wing and increase
lift. This can help smaller aircraft to avoid stalling at lower
airspeeds. Is this a technology that could be usefully applied to
existing small aircraft? Or would it require some totally new design
thinking?



It would be really difficult to mount the equipment inside a prop's
blades!

Why not add a canard to all small A/C?

" wrote in message
ups.com...
Here's some news that recently came out:

http://www.newscientist.com/article.ns?id=dn7867

http://abc.net.au/science/news/stories/s1439827.htm

Apparently, soundwaves can help airflow stay near the wing and increase
lift. This can help smaller aircraft to avoid stalling at lower
airspeeds. Is this a technology that could be usefully applied to
existing small aircraft? Or would it require some totally new design
thinking?

I don't see why not. Chips have been fired out of guns. Shells are now
intelligent. The chips would go into the hub and there would be a
printed circuit on the prop. No I don't see anything impossible.