Why does the CEG supersonic air nozzle out perform other air jets?
In head to head tests, the CEG supersonic air nozzle dislodged harder clay soil and dug faster than other air digging tools. Soil fractures from stress, i.e. force per unit area, on its surface. As shown below for the same pressure and flow, compressed air exiting from a pipe nipple, orifice, or improperly designed nozzle expands outward rapidly to 3 to 4 times the area versus the jet from the patented CEG supersonic nozzle. The flow from these competitors can even go sub-sonic as indicated by the presence of a “Mach Disk,” which can be seen in the flow if the light is right. In head to head tests, the AIR-SPADE ® with CEG supersonic nozzle dislodged harder clay soil and dug faster than other air digging tools. Shown below is a comparison test between the AIR-SPADE ® and two competitive air excavation tools. In the test, the first 3 inches of soil with a moisture content of 23% were excavated by each tool. The CEG supersonic nozzle worked up to 50% faster in the harder soil. In fact, i
