Accession Number : AD0638010

Title :   AN EXPERIMENTAL STUDY OF AIR-LUBRICATED FOILS WITH REFERENCE TO TAPE TRANSPORT IN MAGNETIC RECORDING.

Descriptive Note : Technical rept.

Corporate Author : COLUMBIA UNIV NEW YORK LUBRICATION RESEARCH LAB

Personal Author(s) : Licht,L.

Report Date : AUG 1966

Pagination or Media Count : 161

Abstract : An elastic foil under tension is wrapped partly around a rotating cylinder and is supported on a thin film of air. Capacitance probes, coincident with the surface of the cylinder, scan the air gap along the arc of wrap. The cylinder can be traversed across the width of the stationary foil, so that the topography of the air gap can be determined from a series of circumferential scans. Experimental results are compared quantitatively with theoretical predictions for the perfectly flexible and for the elastic foil-bearing of infinite width. A comparison is also made with theory, for the case when the angle of wrap is small and the entrance and exit transition zones merge. The effect of foil and gap width on side leakage is illustrated. The major part of the study deals with elastic foil-bearings of finite width and with the characteristic 'edge effect' in particular. The influence of various parameters on the nature of the displacement field of foils is demonstrated and related to recent analyses. (Author)

Descriptors :   (*GAS BEARINGS, MAGNETIC RECORDING SYSTEMS), (*MAGNETIC TAPE, GAS BEARINGS), FOILS(MATERIALS), AIR, LUBRICANTS, NUMERICAL ANALYSIS, MEMORY DEVICES

Subject Categories : Lubricants and Hydraulic Fluids
      Computer Hardware
      Machinery and Tools
      Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE