Accession Number : AD0860439

Title :   Synchronization of Multipoint Hoists.

Descriptive Note : Final rept.,

Corporate Author : UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV

Personal Author(s) : Clarke, Dennis P. ; O'Connor, Sean J. ; Karas, George R.

Report Date : JUL 1969

Pagination or Media Count : 82

Abstract : A contractor has conceived an electrohydraulic feedback system that will provide position synchronization of four aircraft cargo hoists. To demonstrate the feasibility of the concept and to verify the method of analysis, the contractor has designed, fabricated, and tested a model four-point synchronized hoist system. Test results show that the feedback system concept provides adequate synchronization control; i.e., the platform pitch and roll angles do not exceed plus or minus 5. The analysis derived to predict performance of the feedback system was shown to be valid. (Author)

Descriptors :   (*HELICOPTER HOISTS, CONTROL SYSTEMS), SUSPENSION DEVICES, HYDRAULIC SERVOMECHANISMS, SYNCHROS, REACTION KINETICS, FEEDBACK, OSCILLATION, LOAD DISTRIBUTION, RESPONSE, MECHANICAL CABLES, ERRORS, PREDICTIONS, RESCUES.

Subject Categories : Helicopters
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE