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1945 __ Luftkanone
Comment : Noise that kills : A single page report on German experimentation with use of sound waves as a weapon, from the Intelligence Bulletin, May 1946 : "Never too busy to pick-up a new idea, or to try out a new weapon, some German scientists in World War II experimented with noise as a means of causing fatalities among troops of the enemies of the Reich. Such was the discovery of Allied observers who investigated the more technical aspects of the Nazi war effort. Near the little town of Lofer, the Germans had established a small experimental station intended originally for research on problems concerned with mountain artillery. Eventually, however, this station became devoted to experiments in connection with lethal sound. Experiments were carried on by a Dr. Richard Wallauscheck, the assistant director for technical research. His last and best design for a sound weapon consisted of a parabolic reflector slightly over 10 1/2 feet in diameter, with a sound combustion chamber mounted to the rear of the reflector. Into this chamber methane and oxygen was fed through two nozzles. The mixture of gases was exploded within the chamber, and the sound of the explosion was intensified and projected by the parabolic reflector. Explosions were continually initiated by the shock wave from preceding explosions at a rate of 800 to 1,500 per second. The main lobe of the sound intensity pattern had a 65-degree angle of opening. At a distance of 60 meters (198.5 feet) from the generator, the sound intensity has been measured at a pressure believed sufficient to kill a man after 30 to 40 seconds exposure. At greater ranges, perhaps up to 330 yards, the same pressure, while not lethal, would be very painful and would probably disable a man for an appreciable length of time. The operator of the device is housed in a wooden cabin at the rear of the machine and wears a soundproof helmet. The weapon has a very doubtful military value, chiefly because of lack of range. The whole machine is large and unwieldy. Unlike some experiments carried on by the Germans, no actual tests were made with human beings acting as guinea pigs. Perhaps this indicates that the Germans themselves did not have too much faith in the device as an effective and practical weapon.”.Toward the end of World War II, the Germans were reported to have made a type of acoustic device. It looked like a large cannon and sent out a sonic boomlike shock wave that in theory could have felled a B-17 bomber. In the mid-1940s, the U.S. Navy created a program called Project Squid to study the German vortex technology. The results are unknown. But Guy Obolensky, an American inventor, says he replicated the Nazi device in his laboratory in 1949. Against hard objects the effect was astounding, he says: It could snap a board like a twig. Against soft targets like people, it had a different effect. "I felt like I had been hit by a thick rubber blanket," says Obolensky, who once stood in its path. (Compiled from various sources)[...] design consisted of a parabolic reflector, 3.2 meters in diameter, having a short tube which was the combustion chamber or sound generator, extending to the rear from the vertex of the parabola. The chamber was fed at the rear by two coaxial nozzles, the outer nozzle emitting methane, and the central nozzle oxygen. The length of the chamber was one-quarter the wavelength of the sound in air. Upon initiation, the first shock wave was reflected back from the openend of the chamber and initiated the second explosion. The frequency was from 800 to 1500 impulses per second. The main lobe of the sound intensity pattern had a 65 degree angle of opening, and at 60 meters' distance on the axis a pressure of 1000 microbars had been measured. No physiological experiments were conducted, but it was estimated that at such a pressure it would take from 30 to 40 seconds to kill a man. At greater ranges, perhaps up to 300 meters, the effect, although not lethal, would be very painful and would probably disable a man for an appreciable length of time. Vision would be affected, and low-level exposures would cause point sources of light to appear as lines." The device was not deployed, due to complexity and lack of range. Also, a device that created vortices in the air, and a device that shot 'plugs' of air were developed at the same facility, primarily for low-level anti-aircraft defence. (Leslie E. Simon, "Secret Weapons of the Third Reich", 1971)
French comment : Le LuftKanone, ou canon à air en français, était une arme anti-aérienne expérimentale créé par les allemands durant la Seconde Guerre mondiale. Elle fut conçue par une usine de Stuttgart durant la guerre par le Dr. Richard Wallauscheck. Elle avait pour but de lancer un jet d'air extrêmement puissant contre les avions ennemies. Apparemment, le canon utilisait un mélange d'excrément et d'urine [? - un mélange de méthane et d’oxygène, selon d’autres sources] pour produire une turbulence assez puissante pour faire tomber un avion. Un seul exemplaire fut produit. Des tests initiaux démontrèrent que l'arme était capable de percer 3 cm de bois à une distance de 200 mètres ce qui était insuffisant pour percer le métal de la coque d'un avion. Malgré tout, à la fin de la guerre, il fut installé sur un pont de l'Elbe sans grand résultat. (Compiled from various sources)
Urls : http://www.sysx.org/soundsite/texts/weapon.html (last visited ) http://www.lonesentry.com/articles/noise/index.html (last visited ) http://greyfalcon.us/restored/AN%20INVENTORY%20OF%20NAZI%20SECRET%20WEAPONS.htm (last visited )

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