Flight Display Systems has provided a custom 20-inch flip-up monitor to NASA for its Boeing 747SP, which is taking part in the Stratospheric Observatory for Infrared Astronomy (Sofia) research program. The display is intended to monitor infrared emissions from space as part of Sofia, which is funded jointly by NASA and the German Aerospace Center. The centerpiece of the research is a 2.5-meter-diameter telescope mounted in the 747SP.
German Aerospace Center
Researchers at the German Aerospace Center (DLR), working at Turbomeca’s test facilities in Bordes, France, have managed to measure the noise inside a helicopter engine. They used new hot-gas microphone probes in an environment of high pressure (up to 12 bar) and high temperature (up to 1,200 degrees C). The microphones were installed at various places inside the engine and around the exhaust. Their signals were recorded simultaneously. Analysis of the noise field enabled the DLR to explain how noise is generated and how sound propagates.