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View Full Version : New Piezo Acoustic Discovery Substantially Reduces Drag.


View Full Version : New Piezo Acoustic Discovery Substantially Reduces Drag.


esecallum
May 4th, 2009, 07:57 AM
New Piezo Acoustic Discovery Substantially Reduces Drag.

Wind tunnel tests done by me on models fitted with piezo acoustic transducers on inside the hull and fed with various audio and ultrasonic frequencies showed dramatic decreases in air resistance of the model's air resistance as it flew through the air.

It seems that the micro vibration of the hull may make the hull more slippery or in some way the hull vibration amplitude pushes/compresses the air out of the way resulting in considerable reduction in drag varying from 20% to 60%.

Another mechanism may be some kind of resonance phenomenon which allows the aircraft to be more slippery through the air.The acoustic device may be distorting the hull by microscopic amounts could be another mechanism.

The piezo transducers are the same as used in toys or electrical devices to make beeping noises/sounds.They were glued solidly onto inside the hull near the front and at other points and then fed various frequencies and waveforms such as sine,square,triangle waveforms at different frequencies.

Piezo disc devices distort when a voltage is applied to the ceramic attached to the usually brass metal disc.If it solidly attached to a another surface then that surface will also distort.

The frequencies generated were from a bog standard laboratory square/sine/triangle waveform generator ranging from 0.1 Hz to 100 kilohertz.These were fed by wires attached to the transducers.

The application of this discovery to both commercial and military aircraft are profound in that the reduction in air resistance will boost speed and reduce fuel consumption and extend range as well as improve maneouverability.

As the frequency required to achieve the lower air resistance varied with wind speed a computer controlled system could easily be used but of course more research is needed in actual aircraft to derive the air resistance versus frequency graphs as well as location parameters which will vary with the shape of the aircraft.

This could also be applied to boats/ships but may cause noise pollution in the ocean disturbing ocean animals.

I claim exclusive ownership of this discovery and I have submitted papers to my lawyer who has notarized this discovery.

Other people can do similar experiments to confirm this for themselves and report on their results.You can use model aircraft , etc. and bog standard lab equipment.

1cooldude
May 4th, 2009, 09:33 AM
What was your average reduction to Hopf drag coefficient?