Accession Number : AD0768200

Title :   Development of a Lightweight Hydraulic Starter System for an Airborne Auxiliary Power Unit.

Descriptive Note : Final rept. 14 Jun 71-30 Apr 73,

Corporate Author : SUNDSTRAND AVIATION ROCKFORD ILL

Personal Author(s) : Paskevich,Stephen C. ; Iseman,Walter J. ; Reynolds,Richard W.

Report Date : AUG 1973

Pagination or Media Count : 322

Abstract : 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)

Descriptors :   (*ENGINE STARTERS, HYDRAULIC EQUIPMENT), AUXILIARY POWER PLANTS, AIRCRAFT EQUIPMENT, HYDRAULIC ACCUMULATORS, ENGINES, MOTORS, WEIGHT

Subject Categories : Aircraft
      Electric Power Production and Distribution
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE