Soundwaves Boost Wing Lift

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

If you look at the theory you will see that it is counteracting the
effect of vortices. In fact the perceived noise fron the aircraft is
REDUCED. It is in fact antisound.


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.

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.