Gulfstream Aerospace's announcement yesterday of four new directors at its Savannah, Ga. headquarters hints at design elements for the widely expected G600, which is thought to be a composite-fuselage, long-range widebody business twinjet. Gulfstream has repeatedly denied such speculation, and a spokesman today maintained there officially is no G600 model, even though the company holds trademarks for this model name, the G625 and G675. Perhaps the most telling appointment is that of David Hornick, who has been tapped as Gulfstream's new director of composite technology. Previously he was the engineering and technology director for GKN Aerospace in Tallassee, Ala., where he led engineers in the development of composite aircraft assemblies. "Gulfstream already uses composites in tail sections and floorboards," the spokesman told AIN. "But we continue to look at composites for other uses–and we wanted someone who was an expert in the field." In addition, Joseph Ireland III was promoted to director of mechanical systems, a field that encompasses flight-control systems; Cindy Jefferson is the new director of initial phase procurement; and Fred Karst was promoted to director of service engineering.