Sankar, R and Jarandhan, S
(1971)
*Making of wing models by tangent-milling.*
The Journal of Aeronautical Society of India, 23 (1).
pp. 37-43.

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## Abstract

Wings whose surfaces arc developable have been milled on a jig-borer at the National Aeronautical Laboratory, Bangalore, employing tangential milling. In this process, the Wing cross-section is approximated by a polygon which can be smoothened by hand-finish. The polygonal approximation itself is such that each side of the polygon is a tangent to the aerofoil. The aerofoil is defined by a finite set of points got from experiments or otherwise. These points are joined smoothly by using Spline approximation to achieve continuity of first and second13; derivatives. The splines and the settings of the jig-borer (for tangential milling) were obtained on the NAL SIRIUS Computer. Each setting of the jig-borer consists of the cutter-height and two turnings of the turnables one about the axis perpendicular to the turntable and the other about a fixed horizontal axis, so that the plane of milling becomes horizontal. The two angles of rotation and the cutter height depend upon the Wing geometry besides some of the machine parameters.

Item Type: | Article |
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Additional Information: | Copyright belongs to Aeronautical Society of India |

Uncontrolled Keywords: | Aircraft models;Milling (machininig);Wing profiles;Airfoils; Cross sections;Jigs;Polygons;Smoothing |

Subjects: | AERONAUTICS > Aeronautics (General) |

Depositing User: | Users 64 not found. |

Date Deposited: | 12 Dec 2006 |

Last Modified: | 24 May 2010 04:24 |

URI: | http://nal-ir.nal.res.in/id/eprint/3711 |

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