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<br /> I <br /> development and has made <br /> advances with superplastically <br /> formed, titanium exhaust mixer <br /> nozzles for commercial aircraft <br /> engines. <br /> High-Tem~erature <br /> Aerostru ctures <br /> Rohr has entered several new <br /> development and prototype- <br /> fabrication contracts using a <br /> range of high-temperature <br /> materials including metals, <br /> metal-matrix composites, high- <br /> RDhr's acoustic technology is a major noise-reduction contributor temperature organic composites <br /> in a program to re-engine Boeing 727-200 aircraft. In addition to and ultra-high-temperature <br /> less noise, the re-engined aircraft have improved performance and <br /> fuel economy. composites such as carbon- <br /> carbon. Applications include <br /> advanced nozzle systems and <br /> including the DynaRohJ"!> family. components from weight-saving surrounding airframe structures <br /> The company's acoustic tech- composites rather than metals. for fighter aircraft currently in <br /> nology has made significant Several prototype components development. Other applications <br /> contributions to "hush kit" have successfully completed are for cooled structures designed <br /> programs for older, four-engine ground and flight testing, leading to withstand intense heat on <br /> aircraft and, more recently, to a to possible production in the internal engine surfaces or <br /> program to quiet Boeing 727s early 1990s. Among these are exterior aircraft surfaces for <br /> through re-engining. fighter engine ducts, commercial hypersonic flight vehicles which <br /> engine fan cases and fan frames, will operate at an extremely <br /> To widen its participation in and a propfan propulsion system high Mach number. <br /> overall propulsion systems, Rohr rotating cowl. Recent developments have led to <br /> has expanded activities in Rohr has successfully tested a increased industry recognition <br /> engine component and high- prototype metal inlet particle of Rohr's ability to develop and <br /> temperature aerostructure separator for the engine of a manufacture high-temperature <br /> technology development. combat helicopter now in aerospace structures. <br /> Engine Components <br /> <br /> Rohr has been using new tech- Research engineers Paul Gray (left) and Duane Linderman examine <br /> an ultra -high -tem perature panel designed to resist heat in h yperson ic <br /> nologies to expand this product flight vehicles. RDhr is developing Sl.æh structures, made from <br /> line. The company has manu- carbon-carbon material, at its Chula Vista facility. <br /> factured several prototype <br /> 10 <br />