ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,913, issued on Sept. 23.
"Variable area fan nozzle actuation system" was invented by Stephen Michael Roberts (San Diego).
According to the abstract* released by the U.S. Patent & Trademark Office: "A variable area fan nozzle (VAFN) actuation system is disclosed. The VAFN actuation system is part of an aircraft nacelle, comprising a thrust reverser translating sleeve and a VAFN cowl. The system may translate the VAFN cowl to various positions to optimize engine performance. The system works in two phases. The first phase occurs when the translating sleeve is stowed. During this time, a linear, fluid-pressure VAFN actuator with multiple pistons may translate the VAFN cowl forward ...