Fabrication and Testing of Lightweight Hydraulic System Simulator Hardware.
Final rept. 15 May 80-15 Nov 85,
ROCKWELL INTERNATIONAL COLUMBUS OH NORTH AMERICAN AIRCRAFT OPERATIONS
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The Lightweight Hydraulic System LHS Advanced Development Program is a multi-phase investigation of the concept of using an 8000 psi operating pressure level to achieve smaller and lighter weight hydraulic components than those used in aircraft with conventional 3000 psi systems. This report presents the results of Phase II in which a full scale A-7E 8000 psi dual system hydraulic simulator was fabricated and tested. Tests conducted were proof pressure, system integration, baseline, dynamic performance, and 600 hours of endurance cycling. No major technological problems were encountered. Four flight control actuators accumulated over 3,000,000 cycles one pump accumulated over 1000 hours of operation Phase I Phase II. Hydraulic system math models were corroborated by test data. A weight and space analysis update projected 33.1 and 36.3 savings, respectively, over an equivalent 3000 psi system. A study of simulator operating experience indicated a 23 improvement in reliability over a comparable 3000 psi system. An additional 600 hours of simulator endurance cycling are scheduled for completion in FY 86.
- Flight Control and Instrumentation
- Hydraulic and Pneumatic Equipment