Design of a balance for NAL base flow facility

Krishnan, V and Kangovi, S and Yajnik, KS and Balasubramaniam, R (1978) Design of a balance for NAL base flow facility. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    This report describes the methodology of designinq a strain gage balance, which is an important,component of the13; proposed special-purpose base flow facility meant for aftbody studies. General design requirements of a balance are first reviewed. A method is then given for calculating loads acting on the balance for a given model configuration. A survey has also been made to assess available materials for balance fabrication and methods of axial force measurement. An internal strain gage balance of 25 rom diameter and 200 rom length was designed based on these design inputs to measure a maximum axial load of 60 Kg in the presence of other loads and moments. The balance was optimised to provide an output of 260 micros trains at the maximum axial load with a resolution of 0.5% of full load. The use of aluminium alloy as an alternative to steel for balance fabrication to measure small 1021s is also examined in this report.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Axicial force unit;Cage section
    Subjects: AERONAUTICS > Aircraft Design, Testing & Performance
    Division/Department: Aerodynamics, Aerodynamics, Aerodynamics, Aerodynamics
    Depositing User: M/S ICAST NAL
    Date Deposited: 25 Aug 2006
    Last Modified: 24 May 2010 09:49
    URI: http://nal-ir.nal.res.in/id/eprint/2576

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