Flight Worthiness of Fire Resistant Hydraulic Systems. Volume 2. Component and Endurance Testing

摘要

This document is the second of two volumes which make up the Flight Worthiness of Fire Resistant Hydraulic Systems final report. This document reports efforts involved in component procurement, analysis, qualification testing, the 750-hour endurance test, analytical model verification, and results of the teardown are included. The follow-on contract to perform a study of pump pulsation attenuation and actuator stiffness are reported in this volume. Components procured for the endurance tests setup included an 8000 psi hydraulic pump, servoactuator, utility actuator, filters, relief and check valves, and various required seals. The results of the endurance test show that 8000 psi CTFE hydraulic systems are a practical and feasible approach for next generation aircraft design. Two areas of concern, pump pulsations, and actuator stiffness were studied. Acceptable candidate solutions for both topics are included. Keywords: Fire resistant hydraulic system, Hydraulic system life-cycle costs.