Development of a Lightweight Hydraulic Starter System for an Airborne Auxiliary Power Unit.
Final rept. 14 Jun 71-30 Apr 73,
SUNDSTRAND AVIATION ROCKFORD ILL
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A report is made of the design study, fabrication and testing of an advanced high pressure hydraulic starting system suitable for use on a high powered lightweight auxiliary power unit ADP. The purpose of the study was to develop the smallest lightest possible hydraulic starting system for a 400 HP APU being developed under Air Force Contract F33615-69-C-1100. Key development items were 1 an 8000 psi helium pressurized metal bellows accumulator using a high strength steel shell with carbon fiber Epoxy composite overwrap 2 an 8000 psi hydraulic motor and hydraulic intensifier unit utilizing only one hydraulic unit and 3 a hydraulic flow sensing starter cutout valve requiring no electrical inputs. The report describes the design rationale in selecting parameters and specific hardware to build an operating system as well as actual test results. Author
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