Design of NAL-NLF-208-MARK 2 airfoil for NAL's light aircraft

Srilatha, KR and Dwarakanath, GS and Ramamoorthy, P (1989) Design of NAL-NLF-208-MARK 2 airfoil for NAL's light aircraft. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    Recently the airfoil NAL-l-.F-208 was designed for NAL's light aircraft. It was sho that this airfoil now designated as Mark 1, performed better than Wortmann airfoil FX-60-177 for the design conditions. Both these airfoils incorporate sharp and almost cusped trailing edges. In response to the sugGestion by the fabricating group NAL-NLF-208-Mark 1 is now modified to incorporate appropriate bluntness at the trailing edGe. The new13; airfoil, designated as NAL-NLF-208-Mark 2, is snown to give the same drag performance and better pitchin? moment compared to Mark 1 airfoil. Further a surface waviness of amplitude of .025 percent and wave length of 4.1 percent each of the local chord was shown to have no significant effect on the I Mark2 airfoil. It is concluded that NAL-NLF-208-Mark 2 airfoil is robust both with respect to performance and fabricatian.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Airfoil;Design;Pressure distribution
    Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
    AERONAUTICS > Aircraft Design, Testing & Performance
    Division/Department: Computational and Theoretical Fluid Dynamics Division, Computational and Theoretical Fluid Dynamics Division, Computational and Theoretical Fluid Dynamics Division
    Depositing User: Deputy Head Poornima Narayana
    Date Deposited: 11 Aug 2006
    Last Modified: 24 May 2010 09:45
    URI: http://nal-ir.nal.res.in/id/eprint/2063

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