Accession Number : ADA328587
Title : The Measurement of Aerodynamic Forces on a Short Body at High Angles of Attack with the Magnetic Balance System.
Descriptive Note : Final rept. 13 Mar 74-31 Dec 74
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROPHYSICS LAB
Personal Author(s) : Bisplinghoff, R. L. ; Coffin, J. B. ; Covert, E. E. ; Finn, D. M. ; Haldeman, C. W.
PDF Url : ADA328587
Report Date : DEC 1974
Pagination or Media Count : 73
Abstract : For many years magnetic suspension systems for wind tunnel models have been in use at the M.I.T. Aerophysics Laboratory. The study of the original balance system included design of a new power supply for the pitch and yaw degrees of freedom which would permit operation at higher angles of attack. Until recently this phase of the original design was not implemented. Under PA Contract No. DAAA2l-74-C-0304 the original design study was reviewed as was the balance capability to support models in the range of + or - 200 deg angle of attack up to a velocity of 400 feet per second. As a consequence, a power supply was designed and a prototype tested. This power supply was then built and data was obtained at angles of attack from -20 to +20 de- grees. This report describes the original balance limits, the choice of surplus aircraft generators for the power supply, the model design used, and the data obtained for the short blunt, finned body configuration. Care was taken to ensure that the new power supplies were compatible with the existing configuration, which has allowed recording accurate Magnus force data.
Descriptors : *AERODYNAMIC FORCES, *MAGNETIC DEVICES, MEASUREMENT, MAGNETIC FIELDS, MAGNETIC PROPERTIES, YAW, AIRCRAFT, ANGLE OF ATTACK, DEGREES OF FREEDOM, PHYSICS, LIMITATIONS, CONFIGURATIONS, BALANCE, POWER SUPPLIES, SUSPENSION DEVICES, GENERATORS, BODIES, FINS, WIND TUNNEL MODELS, HIGH ANGLES.
Subject Categories : Aerodynamics
Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE